Performance Improvement in Cognitive Radio Systems with Correlated Multiple Antennas

Yixian LIU  Yide WANG  Gang WEI  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.4   pp.1053-1056
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1053
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Fundamental Theories for Communications
cognitive radio,  correlated multiple antennas,  opportunistic spectrum access,  spectrum sensing,  

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The performance of spectrum sensing in cognitive radio can be improved by employing multiple antennas. In this letter, the effect of antenna correlation on the performance improvement by deploying multiple antennas in the sensing node of the secondary system is investigated. It is proved mathematically that in the regime of low SNR, with antenna correlation, the secondary sensing node can achieve almost the same performance improvement as that without correlation. Simulation results verify the conclusions.