Adaptive Channel Sensing for Asynchronous Cooperative Spectrum Sensing Scheme

Chunxiao JIANG  Hongyang CHEN  Peisen ZHAO  Nengqiang HE  Canfeng CHEN  Yong REN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E96-B   No.3   pp.918-922
Publication Date: 2013/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.918
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
asynchronous cooperative spectrum sensing,  cognitive radio,  

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Summary: 
Among the cognitive radio technologies, cooperative spectrum sensing has been corroborated to be an effective approach to counter channel fading. Recent research about it is mainly with the assumption that secondary users (SUs) are synchronous with primary users (PUs). In this letter, we discuss the asynchronous situation for the first time, which means SUs have no idea about the communication time table of PUs' network. Based on the ON/OFF channel model, we derive the detection and false alarm probabilities, and the optimal sensing parameters under such asynchronous scenario. Simulation results are shown in the end.