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  • 201. Jiang, Mingzhe
    et al.
    Gia, Tuan Nguyen
    Anzanpour, Arman
    Rahmani, Amir
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    Westerlund, Tomi
    Salantera, Sanna
    Liljeberg, Pasi
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    IoT-based Remote Facial Expression Monitoring System with sEMG Signal2016Inngår i: 2016 IEEE SENSORS APPLICATIONS SYMPOSIUM (SAS 2016) PROCEEDINGS, IEEE, 2016, s. 211-216Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Biopotentials including Electrocardiography (ECG), Electromyography (EMG) and Electroencephalography (EEG) measure the activity of heart, muscles and brain, respectively. They can be used for noninvasive diagnostic applications, assistance in rehabilitation medicine and human-computer interaction. The concept of Internet of Things (IoT) can bring added value to applications with biopotential signals in healthcare and human-computer interaction by integrating multiple technologies such as sensors, wireless communication and data science. In this work, we present a wireless biopotentials remote monitoring and processing system. A prototype with the case study of facial expression recognition using four channel facial sEMG signals is implemented. A multivariate Gaussian classifier is trained offline from one person's surface EMG (sEMG) signals with four facial expressions: neutral, smile, frown and wrinkle nose. The presented IoT application system is implemented on the basis of an eight channel biopotential measurement device, Wi-Fi module as well as signal processing and classification provided as a Cloud service. In the system, the real-time sEMG data stream is filtered, feature extracted and classified within each data segment and the processed data is visualized in a browser remotely together with the classification result.

  • 202. Jin, Y.
    et al.
    Shen, Jue
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Nejad, M. B.
    Xie, Li
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Zou, Zhuo
    KTH, Skolan för informations- och kommunikationsteknik (ICT). Fudan University, China.
    Mao, Jia
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar.
    Zheng, L.
    A Power management scheme for wirelessly-powered RFID tags with inkjet-printed display2017Inngår i: 2017 IEEE International Conference on RFID Technology and Application, RFID-TA 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, s. 180-185Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This work proposes a new power management scheme for wirelessly-powered UHF RFID tags with flexible inkjet-printed Electrochromic (EC) display for human-to-device interaction. EC display on polyimide substrate is integrated at tag side to provide an ambient and direct human-to-device display interface. An aggressive duty-cycling power management scheme with dual supplies is designed to drive the EC display under the tag power budget in microwatt level through RF energy harvesting. In this scheme, energy for display refreshing is accumulated over multiple power management cycles. A single-pixel addressing scheme with minimal pixel size is proposed to further reduce display power and improve tag sensitivity by exploiting EC display bi-stability. The experimental results show that the EC display can be refreshed with the tag sensitivity of -10.5 dBm at 11.7 sec/cm2 update rate.

  • 203. Jonsson, B. E.
    et al.
    Tenhunen, Hannu
    KTH, Tidigare Institutioner                               , Mikroelektronik och informationsteknik, IMIT.
    A 3 V wideband CMOS switched-current A/D-converter suitable for time-interleaved operation2000Inngår i: Analog Integrated Circuits and Signal Processing, ISSN 0925-1030, E-ISSN 1573-1979, Vol. 23, nr 2, s. 127-139Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The simulated and measured performance of an experimental 10-b wideband CMOS A/D converter design is presented. Fully-differential first-generation switched-current circuits with common-mode feedforward were used to implement a 1.5-b/stage pipelined architecture in order to evaluate the switched-current technique for digital radio applications. With f(in) = 1.83 MHz, the measured spurious-free dynamic range (SFDR) is 60.3 dB and the signal-to-noise-and-distortion ratio (SNDR) = 46.5 dB at 3 MS/s. Although this 3 V design was fabricated in a standard digital 5 V, 0.8 mu m CMOS process, a high bandwidth was achieved. Since the ADC maintains an SNDR greater than or equal to 40 dB for input frequencies of more than 20 MHz, it has the highest input bandwidth reported for any CMOS switched-current A/D-converter implementation. Its sample rate can be increased by parallel, time-interleaved, operation. Measurement results are compared with the measured performance of other wideband switched-current A/D converters and found to be competitive also with respect to area and power efficiency.

  • 204. Kalinga, E. A.
    et al.
    Ibwe, K. S.
    Mvungi, N. H.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar.
    Active learning through smart grid model site in challenge based learning course2018Inngår i: IMSCI 2018 - 12th International Multi-Conference on Society, Cybernetics and Informatics, Proceedings, International Institute of Informatics and Systemics, IIIS , 2018, s. 120-126Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Smart Grid is a new and growing technology to developing countries. Its implementation and sustainability rely on well trained experts. Sustainability of the smart grid need local experts, hence a project named iGRID: Smart Grid Capacity Development and Enhancement in Tanzania was started. The project is running at the College of Information and Communication Technologies, University of Dar es Salaam. It intends to generate the necessary technical and scientific skills to ensure sustainable implementation of smart grid. iGRID project introduced taught PhD and Masters programs focusing on society, innovation and entrepreneurship in iGRID aspects, as well as to facilitate implementation of automation of monitoring, evaluation, analysis, control and management of electrical power system (smart grid) in order to improve delivery efficiency and to optimize operational costs in the electrical power system in Tanzania. The project made use of Challenge-Based Learning (CBL) methodology to engage students to work together with stakeholders in identifying challenges facing electrical power system in Tanzania. This paper presents the experience of using CBL methodology to achieve active learning to engineering students. The dynamicity of the teaching model, allowed students to acquire skills necessary to solve medium to high tech complex problems. The results build a continuous learning platform for students researching in electrical field. 

  • 205. Kanduri, A.
    et al.
    Haghbayan, M. -H
    Rahmani, A. M.
    Liljeberg, P.
    Jantsch, A.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar.
    Dark silicon patterning: Efficient power utilization through run-time mapping2017Inngår i: The Dark Side of Silicon: Energy Efficient Computing in the Dark Silicon Era, Springer, 2017, s. 237-258Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    An efficient run-time application mapping approach can considerably enhance resource utilization and mitigate the dark silicon phenomenon. In this chapter, we present a dark silicon aware run-time application mapping approach that patterns active cores alongside the inactive cores in order to evenly distribute power density across the chip. This approach leverages dark silicon to balance the temperature of active cores to provide higher power budget and better resource utilization, within a safe peak operating temperature. In contrast to exhaustive search based mapping techniques, the proposed agile heuristic approach has a negligible run-time overhead. This patterning strategy yields a surplus power budget of up to 17?% along with an improved throughput of up to 21?% in comparison with other state-of-the-art run-time mapping strategies, while the surplus budget is as high as 40?% compared to worst case scenarios.

  • 206. Kanduri, A.
    et al.
    Rahmani, A. M.
    Liljeberg, P.
    Hemani, Ahmed
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar.
    Jantsch, A.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar.
    A perspective on dark silicon2017Inngår i: The Dark Side of Silicon: Energy Efficient Computing in the Dark Silicon Era, Springer, 2017, s. 3-20Kapittel i bok, del av antologi (Fagfellevurdert)
    Abstract [en]

    The possibilities to increase single-core performance have ended due to limited instruction-level parallelism and a high penalty when increasing frequency. This prompted designers to move toward multi-core paradigms [1], largely supported by transistor scaling [2]. Scaling down transistor gate length makes it possible to switch them faster at a lower power, as they have a low capacitance. In this context, an important consideration is power density-the power dissipated per unit area. Dennard’s scaling establishes that reducing physical parameters of transistors allows operating them at lower voltage and thus at lower power, because power consumption is proportional to the square of the applied voltage, keeping power density constant [3]. Dennard’s estimation of scaling effects and constant power density is shown in Table 1.1. Theoretically, scaling down further should result in more computational capacity per unit area. However, scaling is reaching its physical limits to an extent that voltage cannot be scaled down as much as transistor gate length leading to failure of Dennardian trend. This along with a rise in leakage current results in increased power density, rather than a constant power density. Higher power density implies more heat generated in a unit area and hence higher chip temperatures which have to be dissipated through cooling solutions, as increase in temperature beyond a certain level results in unreliable functionality, faster aging, and even permanent failure of the chip. To ensure a safe operation, it is essential for the chip to perform within a fixed power budget [4]. In order to avoid too high power dissipation, a certain part of the chip needs to remain inactive; the inactive part is termed dark silicon [5]. Hence, we have to operate working cores in a multi-core system at less than their full capacity, limiting the performance, resource utilization, and efficiency of the system.

  • 207. Kanduri, A.
    et al.
    Rahmani, Amir
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    Liljeberg, P.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    Predictable Application Mapping for Manycore Real-Time and Cyber-Physical Systems2015Inngår i: Proceedings - IEEE 9th International Symposium on Embedded Multicore/Manycore SoCs, MCSoC 2015, 2015, s. 135-142Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Cyber Physical Systems (CPS) are typically implemented on multicore platforms to handle computational pressure and performance requirements. Complex data flows in those applications cause contention among networked processors, resulting in unpredictable performance. In this work, we explore the impact of application mapping on network contention and predictability. A mapping algorithm focusing on minimizing the number of shared paths while not worsening the total path count is proposed. This algorithm is verified against other recent works over synthetic and realistic traffic patterns. The proposed algorithm considerably improved predictability with 0% shared paths and reasonable latency constraints compared to the other recently proposed algorithms.

  • 208. Kanduri, Anil
    et al.
    Haghbayan, Mohammad-Hashem
    Rahmani, Amir M.
    Liljeberg, Pasi
    Jantsch, Axel
    Dutt, Nikil
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    Approximation Knob: Power Capping Meets Energy Efficiency2016Inngår i: 2016 IEEE/ACM INTERNATIONAL CONFERENCE ON COMPUTER-AIDED DESIGN (ICCAD), Institute of Electrical and Electronics Engineers (IEEE), 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Power Capping techniques are used to restrict power consumption of computer systems to a thermally safe limit. Current many-core systems employ dynamic voltage and frequency scaling (DVFS), power gating (PG) and scheduling methods as actuators for power capping. These knobs are oriented towards power actuation, while the need for performance and energy savings are increasing in the dark silicon era. To address this, we propose approximation (APPX) as another knob for close-looped power management, lending performance and energy efficiency to existing power capping techniques. We use approximation in a pro-active way for long-term performance-energy objectives, complementing the short-term reactive power objectives. We implement an approximation-enabled power management framework, APPEND, that dynamically chooses an application with appropriate level of approximation from a set of variable accuracy implementations. Subject to the system dynamics, our power manager chooses an effective combination of knobs APPX, DVFS and PG, in a hierarchical way to ensure power capping with performance and energy gains. Our proposed approach yields 1.5x higher throughput, improved latency upto 5x, better performance per energy and dark silicon mitigation compared to state-of-the-art power management techniques over a set of applications ranging from high to no error resilience.

  • 209. Kanduri, Anil
    et al.
    Haghbayan, Mohammad-Hashem
    Rahmani, Amir M.
    Liljeberg, Pasi
    Jantsch, Axel
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar. University of Turku, Finland.
    Dutt, Nikil
    Accuracy-Aware Power Management for Many-Core Systems Running Error-Resilient Applications2017Inngår i: IEEE Transactions on Very Large Scale Integration (vlsi) Systems, ISSN 1063-8210, E-ISSN 1557-9999, Vol. 25, nr 10, s. 2749-2762Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Power capping techniques based on dynamic voltage and frequency scaling (DVFS) and power gating (PG) are oriented toward power actuation, compromising on performance and energy. Inherent error resilience of emerging application domains, such as Internet-of-Things (IoT) and machine learning, provides opportunities for energy and performance gains. Leveraging accuracy-performance tradeoffs in such applications, we propose approximation (APPX) as another knob for close-looped power management, to complement power knobs with performance and energy gains. We design a power management framework, APPEND+, that can switch between accurate and approximate modes of execution subject to system throughput requirements. APPEND+ considers the sensitivity of the application to error to make disciplined alteration between levels of APPX such that performance is maximized while error is minimized. We implement a power management scheme that uses APPX, DVFS, and PG knobs hierarchically. We evaluated our proposed approach over machine learning and signal processing applications along with two case studies on IoT-early warning score system and fall detection. APPEND+ yields 1.9x higher throughput, improved latency up to five times, better performance per energy, and dark silicon mitigation compared with the state-of-the-art power management techniques over a set of applications ranging from high to no error resilience.

  • 210. Kanduri, Anil
    et al.
    Haghbayan, Mohammad-Hashem
    Rahmani, Amir-Mohammad
    Liljeberg, Pasi
    Jantsch, Axel
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT). University of Turku, Finland.
    Dark Silicon Aware Runtime Mapping for Many-core Systems: A Patterning Approach2015Inngår i: 2015 33RD IEEE INTERNATIONAL CONFERENCE ON COMPUTER DESIGN (ICCD), IEEE , 2015, s. 573-580Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Limitation on power budget in many-core systems leaves a fraction of on-chip resources inactive, referred to as dark silicon. In such systems, an efficient run-time application mapping approach can considerably enhance resource utilization and mitigate the dark silicon phenomenon. In this paper, we propose a dark silicon aware runtime application mapping approach that patterns active cores alongside the inactive cores in order to evenly distribute power density across the chip. This approach leverages dark silicon to balance the temperature of active cores to provide higher power budget and better resource utilization, within a safe peak operating temperature. In contrast with exhaustive search based mapping approach, our agile heuristic approach has a negligible runtime overhead. Our patterning strategy yields a surplus power budget of up to 17% along with an improved throughput of up to 21% in comparison with other state-of-the-art run-time mapping strategies, while the surplus budget is as high as 40% compared to worst case scenarios.

  • 211. Kanth, R. K.
    et al.
    Ahmad, Waqar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Liljeberg, P.
    Zheng, Li-Rong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Analysis, design and development of novel, low profile 2.487 GHz microstrip antenna2010Inngår i: 2010 14th International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference, ANTEM/AMEREM 2010, 2010, s. 1-4Konferansepaper (Fagfellevurdert)
    Abstract [en]

    International Telecommunication Union Radio Communication Sector ( ITU-R) has assigned 1.176 GHz and 2.487 GHz respectively in L and S band to Regional Navigational Satellite System (RNSS) for satellite navigation purpose. In this paper attempt has been made to design a novel, low profile compact microstrip antenna which achieves required specification such as gain of -4dBi up to ±50° and bandwidth of 30 MHz. The design of S band antenna was carried out using Ansoft Designer software, was fabricated and the required performance of antenna was measured in terms of its return loss, VSWR and gain radiation pattern. The return loss of the developed antenna was measured with the vector network analyzer and its gain radiation pattern in anechoic chamber and the performance of its measurements were compared with the analyzed results.

  • 212.
    Kanth, R. K.
    et al.
    Turku Centre for Computer Science (TUCS).
    Kumar, H.
    Liljeberg, P.
    Turku Centre for Computer Science (TUCS).
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Exploring course development for green ICT in engineering education: A preliminary study2012Inngår i: AICERA 2012 - Annual International Conference on Emerging Research Areas: Innovative Practices and Future Trends, IEEE , 2012, s. 6306685-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper aims to give an insight into the importance of green ICT course in the curriculum of Master and PhD level studies. An attempt has been made to demonstrate its necessity, implementation issues and strategic plans to execute this course. General structural plans along with details of the course content are discussed in this paper. The course aims to provide a unified view of sustainable embedded system technologies, practices of using efficiently computers and telecommunication equipments, environmental assessment strategies and life cycle management of electronic components as well as end-products. The objective of this new course is to give knowledge and foresight toward assessment of environmental impacts. This course will also be capable of imparting knowledge of sustainable design approach in life cycle of the materials, manufacturing processes, use/reuse and recycling of the electronic equipments and components. The course has been proposed of 5 ECTS credit units inclusive of extensive theoretical lectures and lab exercises using suitable environmental assessment software tools.

  • 213.
    Kanth, R. K.
    et al.
    Turku Centre for Computer Science (TUCS).
    Liljeberg, P.
    Turku Centre for Computer Science (TUCS).
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Comparative End-of-Life Study of Polymer and Paper Based Radio Frequency Devices2012Inngår i: International Journal of Environmental Protection, ISSN 2224-7777, Vol. 2, s. 23-27Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In this work end-of-life (EOL) analysis of polymer and paper based radio frequency devices have been carried out. Polymer and paper based RFID antenna has been chosen as a radio frequency device. An attempt has been made to investigate and evaluate the environmental emissions at end-of-life-cycle stage and to explore type and quantity of emissions at their disposal. The Gabi’s balance calculation methodology has been employed to determine amount of environmental emissions at the end-of-life cycle stage. Each significant component of the antenna and their corresponding emissions has been investigated in this paper. We have also compared the corresponding emissions to air and fresh water in both the technologies i.e. incineration and land-filling at EOL stage.

  • 214. Kanth, R. K.
    et al.
    Liljeberg, P.
    Tenhunen, H.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Ahmad, Waqar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Shakya, S.
    Zheng, Li Rong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Autonomous use of fractal structure in low cost, multiband and compact navigational antenna2010Inngår i: Proc. Mediterranean Microwave Symp. (MMS), 2010, s. 135-138Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Different fractal structures and their relevance in navigational antennas have been studied. Based on multiband characteristics and performance of sierpinski gasket fractal structures, a dual band, low profile antenna is devised in this paper. Classical fractal structures have been generated with extensive use of MATL AB, dimensions of the parasitic layers are determined viaseveral optimizations in Math CAD and finally design analysis is carried out using Ansoft Designer. The performance of this antenna is theoretically measured in terms of its return loss, gain radiation pattern and axial ratio. The multi layered physical antenna has been fabricated using glass epoxy substrate material contributing acceptable bandwidth in bothbands. The measured performance of the fabricated antenna has been analyzed and evaluated with the theoretical outcomes.

  • 215. Kanth, R. K.
    et al.
    Liljeberg, P.
    Tenhunen, Hannu
    Turku Centre for Computer Science, University of Turku, Finland.
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Janstch, Axel
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Kumar, H.
    Design of sierpinski grid patch antenna for multiband application2013Inngår i: Progress In Electromagnetics Research Symposium Proceedings, Stockholm, Sweden, Aug. 12-15, 2013, 2013, s. 577-582Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The purpose of this paper is two-fold. Firstly, we have attempted to design a planar Sierpinski fractal antenna with stacked configuration for multiband applications. The stacked configuration of Sierpinski fractal patch and Sierpinski grid are employed to improve the multiband characteristics. The operating frequencies obtained are at 3.3 GHz, 5GHz, 5.74 GHz and 5.9 GHz which covers the bands useful for HIPERLAN2 frequencies and for implementation in futuristic WiFi enabled devices and PCI Cards for mobile internet. The Simulated results show that the operating frequencies obtained are spread over a wide range of frequency band compared to the simple Sierpinski fractal patch antenna. Secondly this paper aims at evaluating the sustainability and life cycle management of proposed antenna.

  • 216.
    Kanth, R. K.
    et al.
    Turku Centre for Computer Science (TUCS).
    Liljeberg, P.
    Turku Centre for Computer Science (TUCS).
    Tenhunen, Hannu
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Kumar, H.
    Quantifying the environmental footprint of rigid substrate printed antenna2012Inngår i: Proceedings of the 2012 IEEE Conference on Technology and Society in Asia, T and SA 2012, IEEE , 2012, s. 6397973-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Quantifying environmental footprint is an important task for the embedded system researcher as this study keep them aware of environmental impacts' threat toward green and healthy living of human beings. In this work we have presented a study on analysis of sustainability and environmental impacts assessment in manufacturing process of rigid substrate printed antennas. Life cycle assessment approach has been employed to quantify and asses the environmental footprint. A case study has been carried out for epoxy resin substrate based tip truncated equilateral triangle microstrip antenna. The subtractive printing methodology have been conducted to trace the required antenna pattern. The output parameters have been analyzed in terms of global warming potential, ozone layer depletion potential, human toxicity and acidification potential. Gabi's balance approach has been utilized to analyze the environmental emissions to the air, fresh water, sea water, agricultural and industrial soils. The consumption of resources has also been shortly described in this paper.

  • 217.
    Kanth, R. K.
    et al.
    Turku Centre for Computer Science (TUCS).
    Liljeberg, P.
    Turku Centre for Computer Science (TUCS).
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Janstch, Axel
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Kumar, H.
    Varshney, L.
    Turku Centre for Computer Science (TUCS).
    Design of Sierpinski Grid Patch Antenna for Multiband Application and Sustainability Analysis in its Manufacturing Process2012Inngår i: IEEE International Conference on Industrial Technology, 2012, s. 1-5Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The purpose of this paper is two-fold. Firstly, we have attempted to design a planar Sierpinski fractal antenna in stacked configuration for multiband application. The stacked configuration of Sierpinski fractal patch and Sierpinski grid are employed to improve the multiband characteristics. The operating frequencies obtained are at 3.3 GHz, 5 GHz, 5.74 GHz and 5.9 GHz which covers the bands useful for HIPERLAN2 frequencies and for implementation in futuristic WiFi enabled devices and PCI Cards for mobile internet. The Simulated results show that the operating frequencies obtained are spread over a wide range of frequency band compared to the simple Sierpinski fractal patch antenna. Secondly this paper aims at evaluating the sustainability and life cycle management of proposed antenna.

  • 218. Kanth, R. K.
    et al.
    Liljeberg, P.
    Tenhunen, Hannu
    University of Turku, Finland.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Kumar, Harish
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Comparative toxic emission analysis in production process of polymer and paper Based RFID tags2012Inngår i: 2012 11th International Conference on Environment and Electrical Engineering, EEEIC 2012 - Conference Proceedings, IEEE , 2012, s. 184-187Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A balance optimization method has been employed to determine the quantity of toxic emissions particularly in emissions to air, fresh water, sea water and industrial soil, in production process of polymer and paper based RFID tags. We have developed a low profile antenna design for passive UHF RFID tags using both polymer and paper substrate with copper and aluminum for the antenna trace. Comparative analysis of toxic emissions during production process of polymer and paper based RFID antennas have been discussed in this paper. Our results show that paper based RFID antennas yield lower organic emissions to the environment while considerably higher inorganic emissions to the air. The results also depict that air is highly affected with the toxic emissions compared to fresh water, sea water and industrial soil.

  • 219. Kanth, R. K.
    et al.
    Liljeberg, P.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Wan, Qiansu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Insight into quantitative environmental emission analysis of printed circuit board2011Inngår i: 2011 10th International Conference on Environment and Electrical Engineering, EEEIC.EU 2011 - Conference Proceedings, 2011, s. 1-4Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents quantitative analysis of environmental emissions in different life cycle stages such as raw material preparation (RMP) and production processing (PP) of printed circuit board. A general emission model for printed circuit board (PCB) has been developed to analyze the emissions to air, fresh water, sea water and industrial soil. This work also demonstrates the quantities of renewable and non-renewable resources that are required to manufacture PCBs. Based on these generic models, the environmental assessment has been carried out in a production of one million PCBs. We also make an attempt to give an analytic description for evaluating the amount of emissions in each life cycle stages of the printed circuit board.

  • 220. Kanth, R. K.
    et al.
    Liljeberg, P.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik.
    Amin, Y.
    Kumar, H.
    Study on sustainability and life cycle assessment of RFID antenna2015Inngår i: Environmental Engineering and Computer Application - Proceedings of the International Conference on Environmental Engineering and Computer Application, ICEECA 2014, CRC Press/Balkema , 2015, s. 369-372Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This work gives a unique insight into evaluating sustainability, life cycle assessment and environmental emissions of the specified RFID tag antenna that validates the potential for ultra-low cost mass production for green electronics. We have designed a printed RFID antenna that employs commercially available paper substrates, and has capability to endure itself at varying environmental effects. The geometry and dimension of the antenna has been set as per requirement of read range of RFID tag. The environmental emissions profiles global warming, acidification potential, ozone layer depletion and human toxicity potentials are illustrated in this paper.

  • 221. Kanth, R. K.
    et al.
    Singhal, A. K.
    Liljeberg, P.
    Tenhunen, Hannu
    Dept. of Inf. Technol., Univ. of Turku, Turku, Finland .
    Analysis, design and development of novel, low profile microstrip antenna for satellite navigation2009Inngår i: Proc. NORCHIP, 2009, s. 1-4Konferansepaper (Fagfellevurdert)
    Abstract [en]

    International Telecommunication Union Radio Communication Sector ( ITU-R) has assigned 1.176 GHz and 2.487 GHz respectively in L and S band to Regional Navigational Satellite System (RNSS) for satellite navigation purpose. In this paper attempt has been made to design a novel, low profile compact microstrip antenna which achieves required specification such as gain of -4 dBi up to ±50° and bandwidth of 30 MHz. The design of L band antenna was carried out using Ansoft Designer Version 2 software and was fabricated and measured the required performance of antenna in terms of its return loss, VSWR and gain radiation pattern. The return loss of the developed antenna was measured with the vector network analyzer and its gain radiation pattern in anechoic chamber and the performance of its measurements were compared with the analyzed results.

  • 222. Kanth, R. K.
    et al.
    Singhal, A. K.
    Liljeberg, P.
    Tenhunen, Hannu
    University of Turku, Finland.
    Design of multiband fractal antenna for mobile and handheld terminals2009Inngår i: 1st South Central Asian Himalayas Regional IEEE/IFIP International Conference on Internet, AH-ICI 2009, 2009, s. 1-4Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The main objective of this paper is to give detailed analysis of a Dual Band fractal antenna operating simultaneously at L and S Band. A L/S band Sierpinski fractal stacked multilayer patch antenna has been designed, and analyzed for achieving -4 dBi gain at ±50 degree using Ansoft Designer Tool. To evaluate the performance of this dual band antenna in comparison to two separate antennas, efforts are also made to design two separate triangular patch antennas resonating at individual L and S band frequencies. The analyzed performance of the antenna indicates two distinct frequency bands, meeting the VSWR requirement and its gain radiation pattern. The designed topology of the dual band fractal antenna can be employed for satellite navigation.

  • 223. Kanth, R. K.
    et al.
    Wan, Qiansu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Kumar, H.
    Liljeberg, P.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Zheng, LiRong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Tenhunen, Hannu
    University of Turku.
    Evaluating sustainability, environment assessment and toxic emissions in life cycle stages of printed antenna2012Inngår i: International Conference On Communication Technology And System Design 2011, Elsevier, 2012, Vol. 30, s. 508-513Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In this work cradle to grave life cycle assessment of printed electronics resources have been presented. An attempt has been made to investigate and evaluate the life cycle assessment and environmental impacts of printed electronics resources such as polymer substrate-printed RFID antenna. Life cycle inventory analysis for these resources has been carried out to quantify total systems' inputs and outputs that are relevant to the environmental impacts especially emissions to air, fresh water, industrial soil and sea water. The results show that printed electronics materials are considerably more environment friendly than materials needed for PCB electronics. We have obtained the mass of emissions in each life cycle stages which verify that technology wise printed antenna causes less harmful and hazardous impacts to the environment.

  • 224. Kanth, R. K.
    et al.
    Wan, Qiansu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Kumar, H.
    Liljeberg, P.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Life cycle assessment of printed antenna: Comparative analysis and environmental impacts evaluation2011Inngår i: Proceedings of the 2011 IEEE International Symposium on Sustainable Systems and Technology, ISSST 2011, New York: IEEE , 2011, s. 5936899-Konferansepaper (Fagfellevurdert)
    Abstract [en]

    THIS paper presents cradle to grave life cycle assessment of printed electronics resources. In this work, an attempt has been made to investigate and evaluate the life cycle assessment and environmental impacts of printed electronics resources such as polymer substrate-printed RFID antenna. Life cycle inventory analysis for these resources has been carried out to quantify total systems' inputs and outputs that are relevant to the environmental impacts especially emissions to air, fresh water, industrial soil and sea water.

  • 225.
    Kanth, Rajeev Kumar
    et al.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Liljeberg, Pasi
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Wan, Qiansu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Shao, Botao
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Chen, Qiang
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem.
    Zheng, Lirong
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektroniksystem. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Kumar, Harish
    Evaluating Sustainability, Environmental Assessment and Toxic Emissions during Manufacturing Process of RFID Based Systems2011Inngår i: Dependable, Autonomic and Secure Computing (DASC), 2011 IEEE Ninth International Conference on, 2011, s. 1066-1071Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The present state of the art research in the direction of embedded systems demonstrate that analysis of life-cycle, sustainability and environmental assessment have not been a core focus for researchers. To maximize a researcher's contribution in formulating environmentally friendly products, devising green manufacturing processes and services, there is a strong need to enhance life-cycle awareness and sustainability understandings among embedded systems researchers, so that the next generation of engineers will be able to realize the goal of a sustainable life-cycle. In this work an attempt has been made to investigate and evaluate the life-cycle management and environmental assessment in fabricating processes of the RFID based systems. We have chosen a general life cycle assessment approach which involves the collection and evaluation of quantitative data on the inputs and outputs of materials and energy associated with the RFID based systems. Based on the developed generic models, we have obtained the results in terms of environmental emissions for a production of paper substrate printed RFID antennas. We also make an attempt to raise several sustainability issues and quantify the toxic emissions during the manufacturing process.

  • 226. Kanth, Rajeev Kumar
    et al.
    Wan, Qiansu
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Pasi, Liljeberg
    Aulis, Tuominen
    Zheng, Li-Rong
    Hannu, Tenhunen
    Investigation and Evaluation of Life Cycle Assessment of Printed Electronics and its Environmental Impacts Analysis2010Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents cradle to gate life cycle assessment of printed electronics resources. In this work an attempt has been made to investigate and evaluate the life cycle assessment and the environmental impacts of printed electronics resources such as printed RFID antenna. Life cycle inventory analysis for these resources has been carried out to quantify total systems’ inputs and outputs that are relevant to environmental impact especially emissions to air, fresh water. We have also compared printed flexible substrate structure based on polymer substrate with inkjet material deposition to more traditional PCB technology. The chosen approach can be easily relevant to other flexible substrates and materials or device structures.

  • 227.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar. Univ Turku, Turku, Finland..
    Ben Dhaou, Imed
    Qassim Univ, Unaizah Coll Engn, Buraydah, Saudi Arabia.;Univ Monastir, Monastir, Tunisia..
    Kondoro, Aron
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system. Univ Dar Es Salaam, Dar Es Salaam, Tanzania..
    Rwegasira, Diana
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system. Univ Dar Es Salaam, Dar Es Salaam, Tanzania..
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system. Univ Turku, Turku, Finland..
    IoT based Appliances Identification Techniques with Fog Computing for e-Health2019Inngår i: IST-Africa 2019 Conference Proceedings / [ed] Paul Cunningham, Miriam Cunningham, IEEE , 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    To improve the living standard of urban communities and to render the healthcare services sustainable and efficient, e-health system is experiencing a paradigm shift. Patients with cognitive discrepancies can be monitored and observed through the analyses of power consumption of home appliances. This paper surveys recent trends in home-based e-health services using metered energy consumption data. It also analyses and summarizes the constant impedance, constant current and constant power (ZIP) approaches for load modelling. The analysis briefly recaptures both non-intrusive and intrusive techniques. The work reports an architecture using IoT technologies for the design of a smart-meter, and fog-computing paradigm for raw processing of energy dataset. Finally, the paper describes the implementation platform based on GirdLAB-D simulation to construct accurate models of household appliances and test the machine-learning algorithm for the detection of abnormal behaviour.

  • 228.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar. Univ Turku, Turku, Finland..
    Ben Dhaou, Imed
    Qassim Univ, Buraydah, Saudi Arabia.;Univ Monastir, Monastir, Tunisia..
    Taajamaa, Ville
    Univ Turku, Turku, Finland..
    Rwegasira, Diana
    Royal Inst Technol, Stockholm, Sweden.;Univ Dar Es Salaam, Dar Es Salaam, Tanzania..
    Kondoro, Aron
    Royal Inst Technol, Stockholm, Sweden.;Univ Dar Es Salaam, Dar Es Salaam, Tanzania..
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar. Univ Turku, Turku, Finland..
    Mvungi, Nerey
    Univ Dar Es Salaam, Dar Es Salaam, Tanzania..
    CHALLENGES FOR TEACHING AND LEARNING ACTIVITIES (TLA) AT ENGINEERING EDUCATION2018Inngår i: 12TH INTERNATIONAL TECHNOLOGY, EDUCATION AND DEVELOPMENT CONFERENCE (INTED) / [ed] Chova, LG Martinez, AL Torres, IC, IATED-INT ASSOC TECHNOLOGY EDUCATION & DEVELOPMENT , 2018, s. 9093-9098Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In the knowledge-based society, the legacy education system does not provide the needed skills for creative engineers especially enhancing student innovation and entrepreneurship capacity. Triple-helix model is a concept that aims to bond universities, industry and government in a bid to create innovations. In Europe, integrating research, education, and innovation together in a comprehensive manner has been the major driving force for local and European university development, as example in the form of European Institute Innovation Technology (EIT). At KTH, there are activities that alien the Teaching and Learning Activities (TLA) with different task group with the aim of creating a mutual innovation capacity to contribute solutions for major social challenges. Some of these task groups are Cross-Cultural Faculty Development for Challenge Driven Education, Global learning and digital platform and open innovation platform for learning. The progress and the success are measured by the number of joint student teams and their skills, knowledge development with the follow-up workshop, and the ongoing research and results of the socio-oriented projects. To enhance TLA and the teaching and learning practices, we have developed new curriculums (MSc. and PhD) for our partners to spark innovation and entrepreneurship where the students interact with Open Lab activities. The assessments show that the enrolled students have gained creative skills in dealing with engineering problem and consolidate their knowledge to improve the future TLA and the Intended Learning Outcome (ILO).

  • 229.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik. University of Turku, Finland .
    DHAOU, Imed BEN
    Unaizah College of Engineering, Qassim University, Saudi Arabia; University of Monastir, Tunisia .
    Kondoro, Aron
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik. University of Dar es Salaam, Tanzania .
    Rwegasira, Diana
    KTH. University of Dar es Salaam, Tanzania .
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik. University of Turku, Finland .
    IoT based Appliances Identification Techniques with FogComputing for e-Health2019Inngår i: 2019 IST-Africa Week Conference (IST-Africa, Narobi, Kenya: IEEE, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    To improve the living standard of urban communities and to render the healthcare services sustainable and efficient, e-health system is experiencing a paradigm shift. Patients with cognitive discrepancies can be monitored and observed through the analyses of power consumption of home appliances. This paper surveys recent trends in home-based e-health services using metered energy consumption data. It also analyses and summarizes the constant impedance, constant current and constant power (ZIP) approaches for load modelling. The analysis briefly recaptures both non-intrusive and intrusive techniques. The work reports an architecture using IoT technologies for the design of a smart-meter, and fog-computing paradigm for raw processing of energy dataset. Finally, the paper describes the implementation platform based on GirdLAB-D simulation to construct accurate models of household appliances and test the machine-learning algorithm for the detection of abnormal behaviour.

  • 230.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Elektronik och inbyggda system. KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar. University of Turku, Finland.
    Nigussie, Ethiopia
    University of Turku, Finland.
    Plosila, Juha
    University of Turku, Finland.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar. University of Turku, Finland.
    Biosignal Feature Extraction Techniques for IoT Healthcare Platform2016Inngår i: IEEE Conference on Design and Architectures for Signal and Image Processing (DASIP2016), Rennes, France, 2016Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    In IoT healthcare platform, a variety of biosignals are acquired from its sensors and appropriate feature extraction techniques are crucial in order to make use of the acquired biosignal data and help the healthcare scientist or bio-engineer to reach at optimal decisions. This work reviews the existing biosignal feature extraction and classification methods for different healthcare applications. Due the enormous amount of different biosignals and since most healthcare applications uses electrocardiogram (ECG), electroencephalogram (EEG), electromyogram (EMG), Electrogastrogram (EGG), we focus the review on feature extractions and classification method for these biosignals. The review also includes a summary of Blood Oxygen Saturation determined by Pulse Oximetry (SpO2), Electrooculography and eye movement (EOG), and Respiration (RSP) signals. Its discussion and analysis focuses on advantages, performance and drawbacks of the techniques.

  • 231.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Elektronik och inbyggda system. KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar. University of Turku, Finland.
    Nigussie, Ethiopia
    University of Turku, Finland.
    Plosila, Juha
    University of Turku, Finland.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar. University of Turku, Finland.
    Biosignal Feature Extraction Techniques for IoT Healthcare Platform2016Inngår i: IEEE Conference on Design and Architectures for Signal and Image Processing (DASIP2016), Rennes, France, 2016Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    In IoT healthcare platform, a variety of biosignals are acquired from its sensors and appropriate feature extraction techniques are crucial in order to make use of the acquired biosignal data and help the healthcare scientist or bio-engineer to reach at optimal decisions. This work reviews the existing biosignal feature extraction and classification methods for different healthcare applications. Due the enormous amount of different biosignals and since most healthcare applications uses electrocardiogram (ECG), electroencephalogram (EEG), electromyogram (EMG), Electrogastrogram (EGG), we focus the review on feature extractions and classification method for these biosignals. The review also includes a summary of Blood Oxygen Saturation determined by Pulse Oximetry (SpO2), Electrooculography and eye movement (EOG), and Respiration (RSP) signals. Its discussion and analysis focuses on advantages, performance and drawbacks of the techniques.

  • 232.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Elektronik och inbyggda system. University of Turku (UTU), Turku, Finland.
    Plosila, Juha
    University of Turku (UTU), Turku, Finland.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Elektronik och inbyggda system. University of Turku (UTU), Turku, Finland.
    Smart Meter Load Profiling for e-Health Monitoring System2019Inngår i: 2019 IEEE 7th International Conference on Smart Energy Grid Engineering (SEGE), Oshawa, ON, Canada: IEEE, 2019, , s. 6Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A structural health-monitoring system needed to come out from the problem associated due to the rapidly growing population of elderly and the health care demand. The paper discussed the consumer's electricity usage data, from the smart meter, how to support the healthcare sector by load profiling the normal or abnormal energy consumption. For this work, the measured dataset is taken from 12 households and collected by the smart meter with an interval of an hour for one month. The dataset is grouped according to the features pattern, reduced by matrix-based analysis and classified with K-Means algorithm data mining clustering method. We showed how the clustering result of the Sum Square Error (SSE) has connection trend to indicate normal or abnormal behavior of electricity usage and leads to determine the assumption of the consumer's health status.

  • 233.
    Kelati, Amleset
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknik, Elektronik och inbyggda system, Integrerade komponenter och kretsar.
    Wearable in a Cloud2018Inngår i: 2018 IEEE/ACM INTERNATIONAL CONFERECE ON CONNECTED HEALTH: APPLICATIONS, SYSTEMS AND ENGINEERING TECHNOLOGIES (CHASE), IEEE , 2018, s. 7-8Konferansepaper (Fagfellevurdert)
    Abstract [en]

    I Nowadays, health care at home becomes more and more important, there are also some product which can measure the ECG, EMG with wearable device. However, these devices are not so accurate for diagnosis because of the low sample rate and less channel on body. In this project, we design a wearable system with 8-channels AFE and use Wi-Fi module to transfer the data to cloud so that we can measure the ECG or EMG more accurate at home, almost at the same sample rate and channels at the hospital. And then the cloud is built for received the data and a real-time display can help doctor monitor the patients' condition remotely. template is essential with some standard steps.

  • 234.
    Kelati, Amleset
    et al.
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik och Inbyggda System. UTU.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik och Inbyggda System.
    Johansson, Fredrik
    KTH, Skolan för informations- och kommunikationsteknik (ICT).
    Deep Breath - Wearable IoT sensor node to Monitor and Detect cough2016Inngår i: Thirteenth International Summer School on Advanced Computer Architecture and Compilation for High-Performance and Embedded Systems, 2016Konferansepaper (Annet (populærvitenskap, debatt, mm))
    Abstract [en]

    Coughing is the number one symptom individuals report when experiencing an illness. It is the most common symptom for respiratory disorders, including chronic lung disease, pneumonia, tuberculosis and influenza. Cough can appear sporadically with common illnesses

    (e.g. cold), but when it becomes chronic it can severely impair life quality. This symptom is the most common reason for people to seek medical advice.

    Continuous monitoring of objective cough frequency and severity can greatly assist physicians to give an early diagnosis of patient’s illness and the assessment of treatment efficiency. It requires a combination of measures characterizing cough frequency, intensity and its impact on quality of life.

    In the proposed project we will investigate a sensor fusion approach, where the sound detection algorithms are combined with additional sensor parameters from a wearable health device. Parameters such as accelerometer and bio impedance data is combined with audio input to give a reliable cough detection. The algorithms will be

    implemented on a low power sensor node for real-time operation. The respiratory sounds and signal processing focused on detection of frequency and phases of respiratory cycle are the main features. The research include cough sound detection designed for operation on sensor node with low power management.

  • 235.
    Kerek, Daniel
    et al.
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Tenhunen, Hannu
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Maguire Jr., Gerald Q.
    KTH, Tidigare Institutioner, Teleinformatik.
    Reichert, Frank
    KTH, Tidigare Institutioner, Teleinformatik.
    Direct Sequence CDMA Technology and its Application to Future Portable Multimedia Communication Systems1994Inngår i: Proceedings of the 1994 IEEE 3rd International Symposium on Spread Spectrum Techniques & Applications. Part 2 (of 2), IEEE , 1994, Vol. 2, s. 445-449Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The design of flexible and efficient future mobile communication systems is a major challenge. The Walkstation Project involves researchers from different areas in order to find a solution via a global system approach. An important task is the investigation of new digital, highly integrated radio interfaces with low cost, small size and low power consumption based on direct sequence CDMA. The simplicity of the design of both the analog and digital parts will allow low power operation and small area in an eventual BiCMOS implementation.

  • 236.
    Kerek, Daniel
    et al.
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Tenhunen, Hannu
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Maguire Jr., Gerald Q.
    KTH, Tidigare Institutioner, Teleinformatik.
    Reichert, Frank
    KTH, Tidigare Institutioner, Teleinformatik.
    The Walkstation transceiver design1994Inngår i: Proceedings of the 44th IEEE Vehicular Technology Conference'94,, IEEE , 1994, Vol. 1, s. 462-466Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The design of flexible and efficient future mobile communication systems is a major challenge. The Walkstation Project involves researchers from different areas in order to find a solution via a global system approach. An important task is the investigation of new digital, highly integrated radio interfaces with low cost, small size and low power consumption based on direct sequence CDMA. The simplicity of the design of both the analog and digital parts will allow low power operation and small area in a eventual BiCMOS implementation.

  • 237. Khan, Aamir
    et al.
    Naqvi, Syeda I.
    Arshad, Farzana
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Elektronik, Integrerade komponenter och kretsar. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. Åbo universitet, Finland.
    A Compact Quad-band CPW-fed Planar Resonator for Multiple Wireless Communication Applications2017Inngår i: Applied Computational Electromagnetics Society Journal, ISSN 1054-4887, Vol. 32, nr 11, s. 1001-1007Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This article presents a low-cost, compact antenna with coplanar waveguide (CPW) feed line for multiband wireless applications. The presented multiband radiator is envisioned for integration into microwave circuits and portable RF devices. The prototype is realized on 1.6 mm thick readily available FR4 substrate with a compact geometrical size of 24x32 mm(2). The acquired quad-bands are centered at: 2.45, 3.5, 5.2 and 5.8 GHz justifying the appropriateness of the proposed radiator for the WLAN and WiMAX applications, as well as Bluetooth and ISM wireless standards. From the aspect of integration into transportable handheld devices and system designing, the presented compact antenna illustrates more expandability and flexibility. The radiation characteristics measured in the E and H-planes for desired operating frequencies are monopole-like and omni-directional, respectively. A sufficient gain is also achieved. Simulated as well as experimental results exhibit agreeable behavior.

  • 238. Khan, Mozammel H.
    et al.
    Hemani, Ahmed
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Tenhunen, Hannu
    KTH, Tidigare Institutioner, Elektroniksystemkonstruktion.
    Implementation-Independent Macrolibrary for Telecommunication in VHDL1996Inngår i: Proceedings of the Baltic Electronics Conference, 1996, s. 291-294Konferansepaper (Fagfellevurdert)
  • 239.
    Khan, Tayyaba
    et al.
    Univ Engn & Technol, Dept Telecommun Engn, Taxila 47050, Pakistan..
    Rahman, MuhibUr
    Polytech Montreal, Dept Elect Engn, Montreal, PQ H3T 1J4, Canada..
    Akram, Adeel
    Univ Engn & Technol, Dept Telecommun Engn, Taxila 47050, Pakistan..
    Amin, Yasar
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik. Univ Engn & Technol, Dept Telecommun Engn, Taxila 47050, Pakistan..
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik.
    A Low-Cost CPW-Fed Multiband Frequency Reconfigurable Antenna for Wireless Applications2019Inngår i: ELECTRONICS, ISSN 2079-9292, Vol. 8, nr 8, artikkel-id 900Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A novel, cedar-shaped, coplanar waveguide-fed frequency reconfigurable antenna is proposed. The presented antenna uses low-cost FR4 substrate with a thickness of 1.6 mm. Four PIN diodes are inserted on the antenna surface to variate the current distribution and alter the resonant frequencies with different combinations of switches. The proposed antenna is fabricated and measured for all states, and a good agreement is seen between measured and simulated results. This antenna resonates within the range of 2 GHz to 10 GHz, covering the major wireless applications of aviation service, wireless local area network (WLAN), worldwide interoperability for microwave access (WiMAX), long distance radio telecommunications, and X-band satellite communication. The proposed antenna works resourcefully with reasonable gain, significant bandwidth, directivity, and reflection coefficient. The proposed multiband reconfigurable antenna will pave the way for future wireless communications including WLAN, WiMAX, and possibly fifth-generation (5G) communication.

  • 240. Khan, U. H.
    et al.
    Aslam, B.
    Khan, J.
    Nadeem, M.
    Shahid, H.
    Azam, M. A.
    Amin, Y.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik.
    A novel asterisk-shaped circularly polarized RFID tag for on-metal applications2016Inngår i: Applied Computational Electromagnetics Society Journal, ISSN 1054-4887, Vol. 31, nr 9, s. 1035-1042Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An asterisk-shaped, metal-mountable RFID tag with a minuscule footprint is presented. The proposed design makes use of multiple asymmetric slots patterned in a cross-shaped fashion to achieve circular polarization. The structure is excited capacitively using a terminally-grounded, T-shaped feed line positioned within the slots. This peculiar arrangement permits the attainment of circular polarized radiation characteristics over a wide band of operation. Impedance matching, antenna size reduction and read range enhancement are the additional advantages offered by the embedded feed line. The final design is realized on a commercially available FR-4 substrate over dimensions of 40 x 40 mm2 yielding an impedance bandwidth and an axial ratio bandwidth of 37 MHz and 20 MHz, respectively. Improvement in antenna gain (and consequently in the read range) is reported upon mounting the tag on metallic surfaces.

  • 241. Khan, Umar Hasan
    et al.
    Aslam, Bilal
    Azam, Muhammad Awais
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Industriell och Medicinsk Elektronik. KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK. University of Turku, Finland.
    Compact RFID Enabled Moisture Sensor2016Inngår i: Radioengineering, ISSN 1210-2512, E-ISSN 1805-9600, Vol. 25, nr 3, s. 449-456Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This research proposes a novel, low-cost RFID tag sensor antenna implemented using commercially available Kodak photo-paper. The aim of this paper is to investigate the possibility of stable, RFID centric communication under varying moisture levels. Variation in the frequency response of the RFID tag in presence of moisture is used to detect different moisture levels. Combination of unique jaw shaped contours and T-matching network is used for impedance matching which results in compact size and minimal ink consumption. Proposed tag is 1.4x9.4 cm(2) in size and shows optimum results for various moisture levels upto 45 % in FCC band with a bore sight read range of 12.1 m.

  • 242. Khan, Umar Hasan
    et al.
    Rasheed, Hira
    Aslam, Bilal
    Fatima, Ammara
    Shahid, Laiba
    Amin, Yasar
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Tenhunen, Hannu
    KTH, Skolan för informations- och kommunikationsteknik (ICT), Centra, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
    Localization of Compact Circularly Polarized RFID Tag Using ToA Technique2017Inngår i: Radioengineering, ISSN 1210-2512, E-ISSN 1805-9600, Vol. 26, nr 1, s. 147-153Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A compact, flexible crossed-dipole circularly polarized antenna using commercially available paper substrate is presented which caters North American frequency band. The crossed-dipoles have meandered lines for reduction of size as well as increased inductivity in the antenna. Dipoles have asymmetric T-shaped rectangular endings to provide the required compactness. Two semicircles are induced between the orthogonal dipoles and meandering matching structure to accomplish circular polarization excitation. Good impedance matching with the chip is achieved through a modified meander line matching structure. The proposed design dimensions are 32 x 32 x 0.4 mm(3). Systematic analysis revealed the results comprising circular polarization 3dB-AR bandwidth of 12 MHz (908-920 MHz) and power transmission coefficient bandwidth of 36 MHz (900-936 MHz). Time delay between interrogating signal and backscattered signal is measured and relative distance is calculated. Linear Least Square (LLS) method is applied to approximate the position of tag in interrogation area. The proposed tag is placed at known locations and its position is measured to analyze accuracy of the method by simulating the positioning algorithm code in MATLAB. Six valid tag positions 0.5-2 m read range and 0 degrees-150 degrees angular resolution has been investigated.

  • 243.
    Kondoro, Aron
    et al.
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik.
    Ben Dhaou, I.
    Rwegasira, Diana
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik.
    Kelati, Amleset
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik.
    Tenhunen, Hannu
    KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektronik, Integrerade komponenter och kretsar.
    Mvungi, N.
    A Simulation Model for the Analysis of Security Attacks in Advanced Metering Infrastructure2018Inngår i: 2018 IEEE PES/IAS PowerAfrica, PowerAfrica 2018, Institute of Electrical and Electronics Engineers Inc. , 2018, s. 533-538Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The integration of Information and Communication Technologies in the power grid has given rise to new applications such as Advanced Metering Infrastructure. However, these technologies have also exposed the grid to new forms of security attacks. It is challenging to analyse and find solutions for these attacks due to the complexity of the grid system. There is a need of simple mechanisms to model and study the security implications of new power applications. This paper introduces a simulation model to evaluate the impact of security attacks on the Advanced Metering Infrastructure of a microgrid. The model is evaluated by demonstrating three security attack scenarios which lead to theft of power theft, privacy loss, and power outage.

  • 244. Kumar, H.
    et al.
    Kanth, R. K.
    Liljeberg, P.
    Tenhunen, Hannu
    University of Turku.
    Metamaterial based slotted patch antenna2011Inngår i: Telecommunication in Modern Satellite Cable and Broadcasting Services (TELSIKS), 2011 10th International Conference on, 2011, s. 43-46Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Metamaterial like EBG (Electromagnetic Band Gap) structures are used in slotted microstrip antenna and mobile handset applications for increasing efficiency and better return loss characteristics. As we know that traditional microstrip antennas have inferior feature in case of bandwidth. In this paper an antenna with slotted ground plane and patch has been developed in which EBG structure is used as a metamaterial above the ground plane for reducing surface wave losses. This antenna has desirable characteristics for use in mobile communications at two frequency bands (2067-2245 MHz) covering UMTS band and (2390-2795 MHz) covering ISM band whereas antenna using EBG structure is working at three frequency bands covering GSM, UMTS and ISM band. The patch size of this antenna is relatively small and is compatible with integrated circuits, and with EBG structures it covers three frequency bands.

  • 245. Latif, K.
    et al.
    Niazi, M.
    Tenhunen, Hannu
    University of Turku.
    Seceleanu, T.
    Sezer, S.
    Application development flow for on-chip distributed architectures2008Inngår i: 2008 IEEE International SOC Conference, SOCC / [ed] Arslan, T; Tran, T; Buechner, T; Marshall, A, 2008, s. 163-168Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We approach the construction of design methodologies for on-chip multiprocessor platforms, with the focus on the SegBus, a segmented bus platform. We study how applications can be mapped on such distributed architecture and show how to build the concrete level software procedures that will coordinate the control flow on the platform. The approach employs models developed in the Matlab-Simulink environment considering also a unified representation of both platform and application. The running example is represented by the H.264 encoder. Allocation of processing elements on the platform, structure and functionality and the eventual control code for arbiters are the in topics described here.

  • 246.
    Latif, K.
    et al.
    University of Turku and Turku Centre for Computer Science (TUCS).
    Rahmani, Amir Mohammad
    University of Turku and Turku Centre for Computer Science (TUCS).
    Guang, Liang
    University of Turku.
    Seceleanu, Tiberiu
    ABB Corporate Research.
    Tenhunen, Hannu
    University of Turku and Turku Centre for Computer Science (TUCS).
    PVS-NoC: Partial Virtual Channel Sharing NoC Architecture2011Inngår i: Proceedings - 19th International Euromicro Conference on Parallel, Distributed, and Network-Based Processing, PDP 2011, IEEE , 2011, s. 470-477Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A novel architecture aiming for ideal performance and overhead tradeoff, PVS-NoC (Partial VC Sharing NoC), is presented. Virtual channel (VC) is an efficient technique to improve network performance, while suffering from large silicon and power overhead. We propose sharing the VC buffers among dual inputs, which provides the performance advantage as conventional VC-based router with minimized overhead. We reason theoretically and demonstrate quantitatively the benefits of proposed architecture by comparing to state-of-the-art NoC routers, with various traffic patterns. Extensive experiments with synthetic and real benchmarks show significant area and power saving with similar performance compared to latest VC based NoC architectures.

  • 247.
    Latif, K.
    et al.
    Turku Centre for Computer Science (TUCS) and University of Turku.
    Rahmani, Amir Muhammad
    Turku Center for Computer Science (TUCS) and University of Turku.
    Liljeberg, P.
    Turku Centre for Computer Science (TUCS) and University of Turku.
    Tenhunen, Hannu
    Turku Centre for Computer Science (TUCS) and University of Turku.
    Seceleanu, T.
    ABB Corporate Research.
    A Cluster-Based Core Protection Technique for Networks-on-Chip2012Inngår i: Proceedings International Computer Software & Applications Conference, 2012, s. 360-361Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Partial Virtual channel Sharing (PVS) architecture has been proposed to enhance the performance of Networks-on-Chip (NoC) based systems. In this paper, a cluster based processing core protection technique for NoC systems using PVS approach is presented. In case of network level faults, the processing core of faulty node can use any other router in the cluster for transmission or reception of data packets with proposed architecture. Simulation results show significant reduction in average packet latency at the expense of negligible area overhead.

  • 248.
    Latif, K.
    et al.
    University of Turku and Turku Centre for Computer Science (TUCS).
    Rahmani, Amir Muhammad
    University of Turku and Turku Centre for Computer Science (TUCS).
    Seceleanu, T.
    Mälardalen University and ABB Corporate Research.
    Tenhunen, Hannu
    University of Turku and Turku Centre for Computer Science (TUCS).
    Designing a High Performance and Reliable Networks-on-Chip Using Network Interface Assisted Routing Strategy2012Inngår i: Proceedings - 15th Euromicro Conference on Digital System Design, DSD 2012, 2012, s. 34-41Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Partial Virtual channel Sharing (PVS) architecture has been proposed to enhance the performance of Networks-on-Chip (NoC) based systems. In this paper, we present an efficient and reliable Network Interface (NI) assisted routing strategy for NoC using PVS architecture. For this purpose, NoC system is divided into clusters. Each cluster is a group of two nodes comprising Processing Elements (PE), switches, links, etc. Each PE in a cluster can inject data to the network through a router, which is closer to the destination. This helps to reduce the network load by reducing the average hop count of the network. The proposed architecture can recover the PE disconnected from the network due to network level faults by allowing the PE to transmit and receive the packets through the other router in the cluster. 5X6 crossbar is used for the proposed architecture which requires one more 5X1 multiplexer without increasing the critical path delay of the router as compared to the 5X5 crossbar. The proposed router has been simulated for uniform and negative exponential distribution (NED) traffic patterns. The simulation results show the significant reduction in average packet latency at the expense of negligible area overhead.

  • 249.
    Latif, K.
    et al.
    University of Turku.
    Rahmani, Amir
    University of Turku.
    Vaddina, K. R.
    University of Turku.
    Seceleanu, T.
    University of Turku.
    Liljeberg, P.
    University of Turku.
    Tenhunen, Hannu
    University of Turku.
    Enhancing Performance of NoC-Based Architectures Using Heuristic Virtual-Channel Sharing Approach2011Inngår i: 2011 35TH IEEE ANNUAL INTERNATIONAL COMPUTER SOFTWARE AND APPLICATIONS CONFERENCE (COMPSAC), IEEE Computer Society, 2011, s. 442-447Konferansepaper (Fagfellevurdert)
    Abstract [en]

    This paper presents a novel virtual-channel (VC) sharing technique for NoC architecture. The proposed architecture improves the utilization of resources to enhance the performance with minimal overheads. A heuristic approach towards the proper VC sharing strategy is proposed, which is performed by an adaptive algorithm that configures the VC sharing based on link load parameters. Architectural design to realize the adaptive VC sharing in generic router is elaborated. The technique can be applied to any NoC architecture, including 3-D NoCs. Extensive quantitative experiments with synthetic and real benchmarks, including an integrated video conference application, demonstrate considerable improvement in area and power efficiency compared to existing VC-based 2D/3D NoC architectures.

  • 250.
    Latif, K.
    et al.
    University of Turku and Turku Centre for Computer Science (TUCS).
    Rahmani, Amir-Muhammad
    University of Turku and Turku Centre for Computer Science (TUCS).
    Nigussie, E.
    University of Turku.
    Tenhunen, Hannu
    University of Turku and Turku Centre for Computer Science (TUCS).
    Seceleanu, T.
    ABB Corporate Research.
    A Novel Topology-Independent Router Architecture to Enhance Reliability and Performance of Networks-on-Chip2011Inngår i: Defect and Fault Tolerance in VLSI and Nanotechnology Systems (DFT), 2011 IEEE International Symposium on, IEEE Computer Society, 2011, s. 454-462Konferansepaper (Fagfellevurdert)
    Abstract [en]

    We present the partial virtual-channel sharing (PVS) NoC architecture which reduces the impact of fault on system performance and can also tolerate the faults on routing logic. A fault in one component makes the fault-free connected components out of use and this in turn leads to considerable performance degradation. Improving utilization of resources is a key to either enhance or sustain performance with minimal overheads in case of fault or overloading. In the proposed architecture autonomic virtual-channel buffer sharing is implemented. The runtime allocation of the buffers depends on incoming load and fault occurrence. This technique can be used in any NoC topology and for both 2D and 3D NoCs. The synthesis results for an integrated video conference application demonstrate significant reduction in average packet latency compared to existing VC-based NoC architecture. Extensive quantitative simulation results for synthetic benchmarks are also carried out. Furthermore, the simulation results reveal that the PVS architecture improves the performance significantly under fault free conditions compared to other VC architectures.

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