Cooperative Wideband Spectrum Sensing Over Fading Channels

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

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

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 multirate 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 modeled. 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 lognormal fading) is analyzed 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 for spectral recovery. In addition, the aliasing effects can bemitigated by the use of different sub-Nyquist sampling rates in a multirate sub-Nyquist sampling system.

Original languageEnglish
Pages (from-to)1382-1394
Number of pages13
JournalIEEE Transactions on Vehicular Technology
Volume65
Issue number3
Early online date26 Feb 2015
DOIs
Publication statusPublished - Mar 2016
Event10th IEEE Vehicle Power and Propulsion Conference 2014 - Coimbra, Portugal
Duration: 27 Oct 201430 Oct 2014

Keywords

  • Cognitive radio (CR)
  • lognormal fading
  • Rayleigh fading
  • sub-Nyquist sampling
  • wideband spectrum sensing
  • COGNITIVE RADIO NETWORKS
  • ENERGY DETECTION
  • POWER
  • PERFORMANCE
  • ALGORITHMS

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