Performance Analysis in Cognitive Radio Systems with Multiple Antennas

Peng WANG; Xiaofeng ZHONG; Limin XIAO; Shidong ZHOU; Jing WANG; Yong BAI

doi:10.1587/transcom.E93.B.182

Regular Section

Performance Analysis in Cognitive Radio Systems with Multiple Antennas

Peng WANG, Xiaofeng ZHONG, Limin XIAO, Shidong ZHOU, Jing WANG, Yong BAI

Author information

Peng WANG
State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University
Xiaofeng ZHONG
State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University
Limin XIAO
State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University
Shidong ZHOU
State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University
Jing WANG
State Key Laboratory on Microwave and Digital Communications, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University
Yong BAI
DoCoMo Beijing Communications Laboratories Co., Ltd.

Keywords: cognitive radio, multiple antennas, opportunistic spectrum access

JOURNAL RESTRICTED ACCESS

2010 Volume E93.B Issue 1 Pages 182-186

DOI https://doi.org/10.1587/transcom.E93.B.182

Details

Abstract

In this letter, the performance improvement by the deployment of multiple antennas in cognitive radio systems is studied from a system-level view. The term opportunistic spectrum efficiency(OSE) is defined as the performance metric to evaluate the spectrum opportunities that can actually be exploited by the secondary user (SU). By applying a simple energy combining detector, we show that deploying multiple antennas at the SU transceiver can improve the maximum achievable OSE significantly. Numerical results also reveal that the improvement comes from the reduction of both the detection overhead and the false alarm probability.

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