Noncoherent Short Packet Detection and Decoding for Scatter Radio Sensor Networking

Scatter radio, i.e., communication by means of reflection, has been recently proposed as a promising technology for low-power wireless sensor networks (WSNs). Specifically, this paper offers noncoherent receivers in scatter radio frequency-shift keying, for either channel-coded or uncoded scatter ra...

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Veröffentlicht in:IEEE transactions on communications Jg. 65; H. 5; S. 2128 - 2140
Hauptverfasser: Alevizos, Panos N., Bletsas, Aggelos, Karystinos, George N.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.05.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Backscatter sensor networks
Channel estimation
Coding
composite hypothesis test
Decoders
Decoding
Design parameters
Detectors
Fading
Frequency shift keying
generalized likelihood-ratio test
Keying
noncoherent detection/decoding
Power gain
Radio
Radio reception
Radiofrequency identification
Rayleigh channels
Receivers
Remote sensors
Rician fading
Scattering
Wireless sensor networks
ISSN:0090-6778, 1558-0857
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Zusammenfassung:Scatter radio, i.e., communication by means of reflection, has been recently proposed as a promising technology for low-power wireless sensor networks (WSNs). Specifically, this paper offers noncoherent receivers in scatter radio frequency-shift keying, for either channel-coded or uncoded scatter radio reception, in order to eliminate the need for training bits of coherent schemes (for channel estimation) at the packet preamble. Noncoherent symbol-by-symbol and sequence detectors based on hybrid composite hypothesis test (HCHT) and generalized likelihood-ratio test, for the uncoded case and noncoherent decoders based on HCHT, for small block-length channel codes, are derived. Performance comparison under Rician, Rayleigh, or no fading, taking into account fixed energy budget per packet is presented. It is shown that the performance gap between coherent and noncoherent reception depends on whether channel codes are employed, the fading conditions (e.g., Rayleigh versus Rician versus no fading), as well as the utilized coding interleaving depth; the choice of one coding scheme over the other depends on the wireless fading parameters and the design choice for extra diversity versus extra power gain. Finally, experimental outdoor results at 13-dBm transmission power corroborate the practicality of the proposed noncoherent detection and decoding techniques for scatter radio WSNs.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2017.2665494