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Distributed Selection and Optimization of Threshold of Energy Detection for Cooperative Spectrum Sensing

Authors:
Lei Xiang
Xianzhong Xie
Weijia Lei
Bin Ma

Keywords: Cognitive radio; Energy detection; Threshold; Cooperative sensing

Abstract:
Spectrum detection is the prerequisite for the Cognitive Radio. Energy detection is often used to sense the spectrum hole in Cognitive Radio network, and the threshold plays a vital role. In this paper, a method of setting threshold is proposed. In the low SNR environment, to protect the primary user, each secondary user observes the environment adaptively and then sets the threshold independently. The simulation results prove that, under the method proposed in this paper, the detection performance can be greatly improved, comparing with the tranditional one , i.e., the threshold is set by the spectrum broker and all the secondary users have a same fixed threshold.

Pages: 6 to 11

Copyright: Copyright (c) IARIA, 2012

Publication date: May 27, 2012

Published in: conference

ISSN: 2308-4030

ISBN: 978-1-61208-199-1

Location: Stuttgart, Germany

Dates: from May 27, 2012 to June 1, 2012