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Pasku, V., De Angelis, A., Moschitta, A., Carbone, P., Nilsson, J.-O., Dwivedi, S. & Händel, P. (2017). A Magnetic Ranging-Aided Dead-Reckoning Positioning System for Pedestrian Applications. Paper presented at IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN. IEEE Transactions on Instrumentation and Measurement, 66(5), 953-963
Åpne denne publikasjonen i ny fane eller vindu >>A Magnetic Ranging-Aided Dead-Reckoning Positioning System for Pedestrian Applications
Vise andre…
2017 (engelsk)Inngår i: IEEE Transactions on Instrumentation and Measurement, ISSN 0018-9456, E-ISSN 1557-9662, Vol. 66, nr 5, s. 953-963Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This paper investigates the applicability of a developed Magnetic Positioning System (MPS) as a support for a dead-reckoning inertial navigation system (DR-INS) for pedestrian applications. The integrated system combines the complementary properties of the separate systems, operating over long periods of time and in cluttered indoor areas with partial nonline-of-sight conditions. The obtained results show that the proposed approach can effectively improve the coverage area of the MPS and the operation time with bounded errors of the DR-INS. In particular, a solution that provides bounded position errors of 1-2 m over significantly long periods of time up to 45 min, in realistic indoor environments, is demonstrated. Moreover, system applicability is also shown in those scenarios where arbitrary orientations of the MPS mobile node are considered and an MPS position estimate is not available due to less than three distance measurements.

sted, utgiver, år, opplag, sider
IEEE, 2017
Emneord
Dead reckoning (DR), indoor positioning, inertial navigation, magnetic fields, range measurement, resonators
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-208236 (URN)10.1109/TIM.2017.2649918 (DOI)000399246000012 ()2-s2.0-85011295568 (Scopus ID)
Konferanse
IEEE International Instrumentation and Measurement Technology Conference (I2MTC), MAY 23-26, 2016, Taipei, TAIWAN
Forskningsfinansiär
VINNOVA
Merknad

QC 20170628

Tilgjengelig fra: 2017-06-28 Laget: 2017-06-28 Sist oppdatert: 2017-06-28bibliografisk kontrollert
Yajnanarayana, V., Magnusson, K. E. G., Brandt, R., Dwivedi, S. & Händel, P. (2017). Optimal Scheduling for Interference Mitigation by Range Information. IEEE Transactions on Mobile Computing, 16(11), 3167-3181
Åpne denne publikasjonen i ny fane eller vindu >>Optimal Scheduling for Interference Mitigation by Range Information
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2017 (engelsk)Inngår i: IEEE Transactions on Mobile Computing, ISSN 1536-1233, E-ISSN 1558-0660, Vol. 16, nr 11, s. 3167-3181Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
IEEE, 2017
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-216601 (URN)10.1109/TMC.2017.2688417 (DOI)000412231100014 ()2-s2.0-85021809245 (Scopus ID)
Merknad

QC 20171115

Tilgjengelig fra: 2017-11-15 Laget: 2017-11-15 Sist oppdatert: 2017-11-15bibliografisk kontrollert
Yajnanarayana, V., Dwivedi, S. & Händel, P. (2016). IR-UWB detection and fusion strategies using multiple detector types. In: IEEE Wireless Communications and Networking Conference, WCNC: . Paper presented at 2016 IEEE Wireless Communications and Networking Conference, WCNC 2016, Doha, Qatar, 3 April 2016 through 7 April 2016. Institute of Electrical and Electronics Engineers (IEEE), Article ID 7565140.
Åpne denne publikasjonen i ny fane eller vindu >>IR-UWB detection and fusion strategies using multiple detector types
2016 (engelsk)Inngår i: IEEE Wireless Communications and Networking Conference, WCNC, Institute of Electrical and Electronics Engineers (IEEE), 2016, artikkel-id 7565140Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Optimal detection of ultra wideband (UWB) pulses in a UWB transceiver employing multiple detector types is proposed and analyzed in this paper. To enable the transceiver to be used for multiple applications, the designers have different types of detectors such as energy detector, amplitude detector, etc., built in to a single transceiver architecture. We propose several fusion techniques for fusing decisions made by individual IR-UWB detectors. In order to get early insight into theoretical achievable performance of these fusion techniques, we assess the performance of these fusion techniques for commonly used detector types like matched filter, energy detector and amplitude detector under Gaussian assumption. These are valid for ultra short distance communication and in UWB systems operating in millimeter wave (mmwave) band with high directivity gain. In this paper, we utilize the performance equations of different detectors, to device distinct fusion algorithms. We show that the performance can be improved approximately by 4 dB in terms of signal to noise ratio (SNR) for high probability of detection of a UWB signal (> 95%), by fusing decisions from multiple detector types compared to a standalone energy detector, in a practical scenario.

sted, utgiver, år, opplag, sider
Institute of Electrical and Electronics Engineers (IEEE), 2016
Emneord
Neyman-Pearson test, Sensor Networks, Time of Arrival (TOA), Ultra Wideband (UWB), UWB ranging, Broadband networks, Communication channels (information theory), Matched filters, Millimeter waves, Radio transceivers, Signal detection, Signal to noise ratio, Time of arrival, Transceivers, Wireless telecommunication systems, Achievable performance, Gaussian assumption, Millimeter waves (mmwave), Multiple applications, Short distance communications, Ultra-wideband pulse, Ultra-wideband (UWB)
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-194858 (URN)10.1109/WCNC.2016.7565140 (DOI)000388603103020 ()2-s2.0-84989813883 (Scopus ID)9781467398145 (ISBN)
Konferanse
2016 IEEE Wireless Communications and Networking Conference, WCNC 2016, Doha, Qatar, 3 April 2016 through 7 April 2016
Merknad

QC 20161209

Tilgjengelig fra: 2016-12-09 Laget: 2016-11-01 Sist oppdatert: 2017-01-09bibliografisk kontrollert
Dwivedi, S., De Angelis, A., Zachariah, D. & Händel, P. (2015). Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements. IEEE Journal on Selected Areas in Communications, 33(11), 2379-2390
Åpne denne publikasjonen i ny fane eller vindu >>Joint Ranging and Clock Parameter Estimation by Wireless Round Trip Time Measurements
2015 (engelsk)Inngår i: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 33, nr 11, s. 2379-2390Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this paper, we develop a new technique for estimating fine clock errors and range between two nodes simultaneously by two-way time-of-arrival measurements using impulse-radio ultrawideband signals. Estimators for clock parameters and the range are proposed, which are robust with respect to outliers. They are analyzed numerically and by means of experimental measurement campaigns. The technique and derived estimators achieve accuracies below 1 Hz for frequency estimation, below 1 ns for phase estimation, and 20 cm for range estimation, at a 4-m distance using 100-MHz clocks at both nodes. Therefore, we show that the proposed joint approach is practical and can simultaneously provide clock synchronization and positioning in an experimental system.

sted, utgiver, år, opplag, sider
IEEE Press, 2015
Emneord
Clock synchronization, range estimation, robust estimators, ultrawideband
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-176946 (URN)10.1109/JSAC.2015.2430521 (DOI)000363238300010 ()2-s2.0-84945119871 (Scopus ID)
Merknad

QC 20151216

Tilgjengelig fra: 2015-12-16 Laget: 2015-11-13 Sist oppdatert: 2017-12-01bibliografisk kontrollert
Gholami, M. R., Dwivedi, S., Jansson, M. & Händel, P. (2015). Ranging without time stamps exchanging. In: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings: . Paper presented at 40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015, 19 April 2014 through 24 April 2014 (pp. 3981-3985). IEEE conference proceedings
Åpne denne publikasjonen i ny fane eller vindu >>Ranging without time stamps exchanging
2015 (engelsk)Inngår i: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, IEEE conference proceedings, 2015, s. 3981-3985Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

We investigate the range estimate between two wireless nodes without time stamps exchanging. Considering practical aspects of oscillator clocks, we propose a new model for ranging in which the measurement errors include the sum of two distributions, namely, uniform and Gaussian. We then derive an approximate maximum likelihood estimator (AMLE), which poses a difficult global optimization problem. To avoid the difficulty in solving the complex AMLE, we propose a simple estimator based on the method of moments. Numerical results show a promising performance for the proposed technique.

sted, utgiver, år, opplag, sider
IEEE conference proceedings, 2015
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-181568 (URN)10.1109/ICASSP.2015.7178718 (DOI)000427402904019 ()2-s2.0-84946048307 (Scopus ID)9781467369978 (ISBN)
Konferanse
40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015, 19 April 2014 through 24 April 2014
Merknad

QC 20160229

Tilgjengelig fra: 2016-02-29 Laget: 2016-02-02 Sist oppdatert: 2020-02-25bibliografisk kontrollert
Yajnanarayana, V., Dwivedi, S. & Händel, P. (2014). Design of impulse radio UWB transmitter with improved range performance using PPM signals. In: 2014 IEEE International Conference on Electronics, Computing and Communication Technologies (IEEE CONECCT): . Paper presented at 2014 IEEE International Conference on Electronics, Computing and Communication Technologies, IEEE CONECCT 2014, Bangalore, India, 6 January 2014 through 7 January 2014 (pp. 1-5). IEEE Computer Society
Åpne denne publikasjonen i ny fane eller vindu >>Design of impulse radio UWB transmitter with improved range performance using PPM signals
2014 (engelsk)Inngår i: 2014 IEEE International Conference on Electronics, Computing and Communication Technologies (IEEE CONECCT), IEEE Computer Society, 2014, s. 1-5Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

There are several practical challenges in designing an ultra wideband (UWB) device for communication. From the physical layer signaling perspective it is important to avoid the strong peaks in the transmitted signal to fully exploit the regulatory bodies power constraint requirements. This will result in increased range performance for the sensors. Design of the transmit impulse radio (IR) UWB signals under the practical constraints of hardware and regulatory body is a critical optimization issue in the UWB system design. In this paper, we propose a IR-UWB signaling, which is a variant of pulse position modulation (PPM) method and achieves an increased range performance under the practical constraints of hardware and Federal Communications Commission (FCC) regulations.

sted, utgiver, år, opplag, sider
IEEE Computer Society, 2014
Emneord
peak to average power (PAPR), pulse position modulation, time to digital converter (TDC), Ultra wideband, UWB communication
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-141049 (URN)10.1109/CONECCT.2014.6740281 (DOI)000349779700019 ()2-s2.0-84900578464 (Scopus ID)978-1-4799-2318-2 (ISBN)
Konferanse
2014 IEEE International Conference on Electronics, Computing and Communication Technologies, IEEE CONECCT 2014, Bangalore, India, 6 January 2014 through 7 January 2014
Merknad

QC 20140522

Tilgjengelig fra: 2014-02-06 Laget: 2014-02-06 Sist oppdatert: 2015-03-27bibliografisk kontrollert
Dwivedi, S. & Händel, P. (2014). Precise Clock Parameter Estimation and Ground Truth Capture for Clock Error Measurements using FPGAs. In: 2014 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication (ISPCS): . Paper presented at 8th IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS), SEP 22-26, 2014, Austin, TX (pp. 83-86). IEEE
Åpne denne publikasjonen i ny fane eller vindu >>Precise Clock Parameter Estimation and Ground Truth Capture for Clock Error Measurements using FPGAs
2014 (engelsk)Inngår i: 2014 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication (ISPCS), IEEE , 2014, s. 83-86Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this extended abstract we discuss and propose a mechanism to estimate clock parameters between two clocks using TDC. Simultaneously, we have proposed a ground truth capture methodology for clock error measurements. In particular, we have proposed an accurate way of measuring clock phase ground truth at any instant in time using delay lines in FPGA. Accuracy of clock phase ground truth measurement can be up to 16 ps. We have estimated clock parameters from measurements and have compared it with clock ground truth obtained using suggested methods. Relative frequency errors are estimated with RMSE of 0.46 Hz and phase error is estimated with RMSE of 0.29 ns.

sted, utgiver, år, opplag, sider
IEEE, 2014
Serie
IEEE International Symposium on Precision Clock Synchronization for Meaurement Control and Communication, ISSN 1949-0305
Emneord
Synchronization, Networks
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-160809 (URN)10.1109/ISPCS.2014.6948696 (DOI)000349106400015 ()2-s2.0-84913613198 (Scopus ID)978-1-4799-2699-2 (ISBN)
Konferanse
8th IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS), SEP 22-26, 2014, Austin, TX
Merknad

QC 20150227

Tilgjengelig fra: 2015-02-27 Laget: 2015-02-27 Sist oppdatert: 2015-02-27bibliografisk kontrollert
Zachariah, D., De Angelis, A., Dwivedi, S. & Händel, P. (2014). Schedule-based sequential localization in asynchronous wireless networks. EURASIP Journal on Advances in Signal Processing, 2014(1), 16
Åpne denne publikasjonen i ny fane eller vindu >>Schedule-based sequential localization in asynchronous wireless networks
2014 (engelsk)Inngår i: EURASIP Journal on Advances in Signal Processing, ISSN 1687-6172, E-ISSN 1687-6180, Vol. 2014, nr 1, s. 16-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In this paper, we consider the schedule-based network localization concept, which does not requiresynchronization among nodes and does not involve communication overhead. The concept makesuse of a common transmission sequence, which enables each node to perform self-localization andto localize the entire network, based on noisy propagation-time measurements. We formulate theschedule-based localization problem as an estimation problem in a Bayesian framework. This pro-vides robustness with respect to uncertainty in such system parameters as anchor locations and timing devices. Moreover, we derive a sequential approximate maximum a posteriori (AMAP) estimator.The estimator is fully decentralized and copes with varying noise levels. By studying the fundamentalconstraints given by the considered measurement model, we provide a system design methodology which enables a scalable solution. Finally, we evaluate the performance of the proposed AMAPestimator by numerical simulations emulating an impulse-radio ultra-wideband (IR-UWB) wireless network.

Emneord
Wireless positioning, Cooperative localization, Asynchronous networks
HSV kategori
Forskningsprogram
Elektro- och systemteknik
Identifikatorer
urn:nbn:se:kth:diva-141050 (URN)10.1186/1687-6180-2014-16 (DOI)000332014700001 ()2-s2.0-84904538074 (Scopus ID)
Forskningsfinansiär
Vinnova
Merknad

QC 20140331

Tilgjengelig fra: 2014-02-06 Laget: 2014-02-06 Sist oppdatert: 2017-12-06bibliografisk kontrollert
Yajnanarayana, V., Dwivedi, S., De Angelis, A. & Händel, P. (2014). Spectral efficient IR-UWB communication design for low complexity transceivers. EURASIP Journal on Wireless Communications and Networking, 2014(158)
Åpne denne publikasjonen i ny fane eller vindu >>Spectral efficient IR-UWB communication design for low complexity transceivers
2014 (engelsk)Inngår i: EURASIP Journal on Wireless Communications and Networking, ISSN 1687-1472, E-ISSN 1687-1499, Vol. 2014, nr 158Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Ultra wideband (UWB) radio for communication has several challenges. From the physical layer perspective, asignaling technique should be optimally designed to work in synergy with the underneath hardware to achievemaximum performance. In this paper, we propose a variant of pulse position modulation (PPM) for physical layersignaling, which can achieve raw bitrate in excess of 150 Mbps on a low complexity in-house developed impulseradio UWB platform. The signaling system is optimized to maximize bitrate under practical constraints of lowcomplexity hardware and regulatory bodies. We propose a detector and derive its theoretical performance boundsand compare the performance in simulation in terms of symbol error rates (SER). Modifications to the signaling, whichcan increase the range by 4 times with a slight increase in hardware complexity, is proposed. Detectors for thismodification and a comparative study of the performance of the proposed UWB physical layer signaling schemes interms of symbol error rates are discussed.

sted, utgiver, år, opplag, sider
Springer, 2014
Emneord
Pulse position modulation, Sensor networks, Time-to-digital converter, Ultra wideband, UWB communication
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-153968 (URN)10.1186/1687-1499-2014-158 (DOI)000343715700001 ()2-s2.0-84909987450 (Scopus ID)
Forskningsfinansiär
Vinnova
Merknad

QC 20141023

Tilgjengelig fra: 2014-10-10 Laget: 2014-10-10 Sist oppdatert: 2017-12-05bibliografisk kontrollert
De Angelis, A., Dwivedi, S. & Händel, P. (2013). Application of time-to-digital converters to radio-frequency distance measurement. In: NoMe - TDC 2013 - 2013 IEEE Nordic Mediterranean Workshop on Time to Digital Converters, Proceedings: . Paper presented at 2013 1st IEEE Nordic Mediterranean Workshop on Time to Digital Converters, NoMe - TDC 2013; Perugia; Italy; 3 October 2013 through 3 October 2013 (pp. 31-35).
Åpne denne publikasjonen i ny fane eller vindu >>Application of time-to-digital converters to radio-frequency distance measurement
2013 (engelsk)Inngår i: NoMe - TDC 2013 - 2013 IEEE Nordic Mediterranean Workshop on Time to Digital Converters, Proceedings, 2013, s. 31-35Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The application of TDCs to wireless distance measurement problems is evaluated by means of experimental tests using a realized system. The system is capable of measuring the round-trip-time of ultra-wideband radio pulses propagating between two active transceivers, utilizing a commercial TDC with sub-nanosecond resolution. The results show an operational range of approximately 30 m in an indoor environment, with a distance-measurement error of less than 0.5 m in approximately 90% of the considered cases. Further, a discussion of the fundamental error sources is provided, analyzing the effect of RF interference, timing jitter, received signal strength, and propagation conditions.

Emneord
Experimental test, Indoor environment, Operational range, Radio frequencies, Received signal strength, Sub nanoseconds, Time to digital converters, Ultra-wideband radio
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-137675 (URN)10.1109/NoMeTDC.2013.6658235 (DOI)2-s2.0-84892614404 (Scopus ID)978-147991184-4 (ISBN)
Konferanse
2013 1st IEEE Nordic Mediterranean Workshop on Time to Digital Converters, NoMe - TDC 2013; Perugia; Italy; 3 October 2013 through 3 October 2013
Merknad

QC 20140403

Tilgjengelig fra: 2013-12-16 Laget: 2013-12-16 Sist oppdatert: 2014-04-03bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-7450-8681