A Method to Mitigate the Impact of Primary User Traffic on an Energy Detector in Spectrum Sensing

Truc Thanh TRAN  Alagan S. ANPALAGAN  Hyung Yun KONG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E96-B   No.6   pp.1522-1530
Publication Date: 2013/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.1522
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
spectrum sensing,  cognitive radio,  energy detection,  Neyman-Pearson criterion,  

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Summary: 
In this article, we propose a method to reduce the impact of primary traffic on spectrum sensing performance. In practice, the sensing performance is degraded by noise-only sample in the spectrum sensing time. Therefore, we employ a time of primary user (PU) signal arrival detector in order to remove the noise-only portion. Then, we employ equal-weight-based energy detection (EWED) to provide the detection decision. The analysis and simulation results show that there exists an optimal early time of arrival (ToA) false alarm which provides better performance compared to the use of a single EWED scheme.