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Low complexity burst packet detection for wireless-powered UWB RFID systems
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Industrial and Medical Electronics. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
KTH, School of Information and Communication Technology (ICT), Industrial and Medical Electronics. KTH, School of Information and Communication Technology (ICT), Centres, VinnExcellence Center for Intelligence in Paper and Packaging, iPACK.
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2015 (English)In: 2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB), 2015, 1-5 p.Conference paper, Published paper (Refereed)
Abstract [en]

This paper addresses the issue of UWB signal acquisition in the context of wireless powered UWB RFID systems. In this scenario, the data transmission is based on short packet so as to meet the micro-power budget of autonomous power harvesting. The burst short packet transmission as well as the low duty cycling UWB pulse modulation places a stringent challenge at the UWB receiver for timing acquisition and packet detection. Besides, in a positioning enabled RFID system where variable signal-to-noise ratio (SNR) due to the variable link distance and noise background is unavoidable, conventional packet detection schemes rely on predefined threshold can hardly achieve good performance. In this study, we propose a low complexity method for burst packet detection. It is performed by sensing the preamble signal characteristic instead of the received signal strength, and thus bypassing the necessity of detection threshold. The validity of the proposed approach and its adaptivity to SNR variations is demonstrated by simulation results as well as field test with a UWB software defined radio (SDR) platform.

Place, publisher, year, edition, pages
2015. 1-5 p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-184150DOI: 10.1109/ICUWB.2015.7324469ISI: 000380434500080Scopus ID: 2-s2.0-84962208004OAI: oai:DiVA.org:kth-184150DiVA: diva2:915088
Conference
IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB), 4-7 Oct. 2015, Montreal, QC
Note

QC 20160404

Available from: 2016-03-29 Created: 2016-03-29 Last updated: 2016-11-11Bibliographically approved
In thesis
1. Sub-Nyquist Sampling Impulse Radio UWB Receivers for the Internet-of-Things
Open this publication in new window or tab >>Sub-Nyquist Sampling Impulse Radio UWB Receivers for the Internet-of-Things
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In the era of Internet-of-Things, the demand for short range wireless links featured by low-power and low-cost, robust communication and high-precision positioning is growing rapidly. Impulse Radio Ultra-Wideband (IR-UWB) technology characterized by the transmission of sub-nanosecond pulses spanning up to several GHz band with extremely low power spectral density emerges as a promising candidate. Nevertheless, several challenges must be confronted in order to take the full advantage of IR-UWB technology. The most significant one lies in the reception of UWB signals. Traditional receiver requires Nyquist rate ADC which is overwhelmingly complex and power hungry. This dissertation proposes and investigates possible sub-Nyquist sampling techniques for IR-UWB receiver design.

In the first part of this dissertation, the IR-UWB receiver based on energy detection (ED) principle is explored. A low-power ED receiver featured by flexibility and multi-mode operation is proposed. The receiver prototype for 3-5 GHz band is implemented in 90 nm CMOS. Measurement results demonstrate that 16.3 mW power consumption and -79 dBm sensitivity at 10 Mb/s data rate can be achieved. To further optimize the receiver performance, threshold optimization is suggested for the on-off-keying modulated signal, and adaptive synchronization and integration region optimization is proposed. Finally, a low complexity burst packet detection scheme is proposed, which is adaptive to the variations of noise background and link distance.

In the second part of this dissertation, the IR-UWB receiver based on compressed sensing (CS) theory is investigated. Firstly, appropriate sparse basis, sensing matrix and reconstruction algorithms are suggested for the CS based IR-UWB receiver. And then, the architectural analysis of the CS receiver with focuses on the random noise processes in the CS measurement procedure is presented. At last, a novel two-path noise-reducing architecture for the CS receiver is proposed. Besides the improvement on the receiver performance, the proposed architecture also relaxes the hardware implementation of the CS random projection as well as the back-end signal reconstruction.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. 79 p.
Series
TRITA-ICT, 2016:23
Keyword
Ultra-Wideband, impulse radio, receiver, energy detection, compressed sensing, sub-Nyquist sampling, Internet-of-Things
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Information and Communication Technology
Identifiers
urn:nbn:se:kth:diva-195816 (URN)978-91-7729-174-9 (ISBN)
Public defence
2016-12-12, Sal 205, Electrum, Kista, 09:00 (English)
Opponent
Supervisors
Note

QC 20161110

Available from: 2016-11-10 Created: 2016-11-09 Last updated: 2016-11-10Bibliographically approved

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Zhou, QinZou, ZhuoChen, QiangTenhunen, HannuZheng, Li-Rong
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