低信噪比下基于双检测长度的频谱感知算法

doi:10.3969/j.issn.1001-2400.2014.03.013

Abstract

Abstract:

According to the spectrum sensing problem under a low signal-noise ratio (SNR) in cognitive radio networks, this paper proposes a spectrum sensing method based on the double sensing length. For the proposed algorithm, a short length energy detection will be carried out first. While it is making the decision there is no primary user, and the second long length energy detection will be taken to make the final decision. This paper analyzes some significant properties, such as the average sample number (ASN), detection performance and implementation complexity. Simulation results validate the theory, and show that in the low SNR regime the proposed algorithm can make the spectrum sensing more efficient than conventional energy detection. Meanwhile it possesses the advantages of a smaller ASN and lower complexity, and has potential applicability in cognitive radio sensor networks.

Key words: cognitive radio networks, spectrum sensing, energy detection, double sensing length

GAO Rui;LI Zan;QI Peihan;GUAN Lei;LIU Jin. Spectrum sensing method based on the double sensing length under a low SNR[J].J4, 2014, 41(3): 88-94.

References

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Spectrum sensing method based on the double sensing length under a low SNR

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