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Cooperative Wideband Spectrum Sensing over Fading Channels

Sun, Hongjian; Nallanathan, Arumugam; Cui, Shuguang; Wang, Cheng-Xiang

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Arumugam Nallanathan

Shuguang Cui

Cheng-Xiang Wang


In cognitive radio (CR) systems, it is crucial for secondary users to reliably detect spectral opportunities across a wide frequency range. This paper studies a novel multi-rate sub- Nyquist spectrum sensing (MS3) system capable of performing wideband spectrum sensing in a cooperative CR network over fading channels. The aliasing effects of sub-Nyquist sampling are modelled. To mitigate such effects, different sub-Nyquist sampling rates are applied such that the numbers of samples at different CRs are consecutive prime numbers. Moreover, the performance of MS3 over fading channels (Rayleigh fading and log-normal fading) is analysed in the form of bounds on the probabilities of detection and false alarm. The key finding is that the wideband spectrum can be sensed using sub-Nyquist sampling rates in MS3 over fading channels, without the need of spectral recovery. In addition, the aliasing effects can be mitigated by the use of different sub-Nyquist sampling rates in a multi-rate sub-Nyquist sampling system.


Sun, H., Nallanathan, A., Cui, S., & Wang, C. (2016). Cooperative Wideband Spectrum Sensing over Fading Channels. IEEE Transactions on Vehicular Technology, 65(3), 1382-1394.

Journal Article Type Article
Acceptance Date Feb 7, 2015
Online Publication Date Feb 28, 2015
Publication Date Mar 10, 2016
Deposit Date Feb 20, 2015
Publicly Available Date Mar 16, 2015
Journal IEEE Transactions on Vehicular Technology
Print ISSN 0018-9545
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 65
Issue 3
Pages 1382-1394
Keywords Cognitive radio, Rayleigh fading, Log-normal fading, Sub-Nyquist sampling, Wideband spectrum sensing.


Accepted Journal Article (397 Kb)

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