Two Adaptive Energy Detectors for Cognitive Radio Systems

Siyang LIU  Gang XIE  Zhongshan ZHANG  Yuanan LIU  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.6   pp.2332-2335
Publication Date: 2009/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2332
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
energy detector,  spectrum sensing,  cognitive radio,  

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Two adaptive energy detectors are proposed for cognitive radio systems to detect the primary users. Unlike the conventional energy detector (CED) where a decision is made after receiving all samples, our detectors make a decision with the sequential arrival of samples. Hence, the sample size of the proposed detectors is adaptive. Simulation results show that for a desired performance, the average sample size of the proposed detectors is much less than that of the CED. Therefore, they are more agile than the CED.