Performance Improvement in Cognitive Radio Systems with Correlated Multiple Antennas

Yixian LIU; Yide WANG; Gang WEI

doi:10.1587/transcom.E94.B.1053

Regular Section

Performance Improvement in Cognitive Radio Systems with Correlated Multiple Antennas

Yixian LIU, Yide WANG, Gang WEI

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Keywords: cognitive radio, correlated multiple antennas, opportunistic spectrum access, spectrum sensing

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2011 Volume E94.B Issue 4 Pages 1053-1056

DOI https://doi.org/10.1587/transcom.E94.B.1053

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Abstract

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.

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