Cooperative Spectrum Sensing Using Sub-Nyquist Sampling in Cognitive Radios

Honggyu JUNG  Thu L. N. NGUYEN  Yoan SHIN  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E99-A   No.3   pp.770-773
Publication Date: 2016/03/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E99.A.770
Type of Manuscript: LETTER
Category: Communication Theory and Signals
sub-Nyquist sampling,  sparsity,  compressed sensing,  spectrum sensing,  energy detection,  

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We propose a cooperative spectrum sensing scheme based on sub-Nyquist sampling in cognitive radios. Our main purpose is to understand the uncertainty caused by sub-Nyquist sampling and to present a sensing scheme that operates at low sampling rates. In order to alleviate the aliasing effect of sub-Nyquist sampling, we utilize cooperation among secondary users and the sparsity order of channel occupancy. The simulation results show that the proposed scheme can achieve reasonable sensing performance even at low sampling rates.