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Detection time analysis for the multiple-user cooperative spectrum sensing scheme in cognitive radio networks

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Abstract

In this paper, a novel multiple-user cooperative spectrum sensing (MCSS) scheme is proposed to achieve the spatial diversity gains for cognitive radio (CR) networks, where only the best relay, selected among all the candidate relays in accordance with the quality of channel conditions, is utilized to cooperatively detect the primary user. Closed-form expressions of detection time for the traditional non-cooperative and the proposed MCSS schemes are derived over Rayleigh fading channels. In addition, numerical experimentations are conducted to make a performance comparison between the non-cooperative sensing and our scheme. The result shows that by exploiting the multiple-user cooperation, the detection time is reduced greatly and moreover, diversity gains obtained by the MCSS scheme increase with a rise in the number of candidate relays.

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Authors and Affiliations

  1. Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecomm, Nanjing, 210003, China

    Jia Zhu, BaoYu Zheng & YuLong Zou

Authors
  1. Jia Zhu
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  2. BaoYu Zheng
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  3. YuLong Zou
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Corresponding author

Correspondence to Jia Zhu.

Additional information

Supported by the Postgraduate Innovation Program of Scientific Research of Jiangsu Province (Grant Nos. CX08B 080Z, CX09B 150Z), the National Natural Science Foundation of China (Grant No. 60972039), the Key Project of Natural Science Funding of Jiangsu Province (Grant No. BK2007729), the National High-Tech Research & Development Program of China (Grant No. 2009AA01Z241), and the Major Development Program of Jiangsu Educational Committee (Grant No. 06KJA51001)

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Zhu, J., Zheng, B. & Zou, Y. Detection time analysis for the multiple-user cooperative spectrum sensing scheme in cognitive radio networks. Sci. China Ser. F-Inf. Sci. 52, 1915–1925 (2009). https://doi.org/10.1007/s11432-009-0166-x

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  • DOI: https://doi.org/10.1007/s11432-009-0166-x

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