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Volume 31 Issue 10
Dec.  2010
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Yang Li, Wang Xiao-xiang, Zhao Kun. Cooperative Spectrum Sensing Algorithm in Multi-antenna Cognitive Radio[J]. Journal of Electronics & Information Technology, 2009, 31(10): 2338-2342. doi: 10.3724/SP.J.1146.2008.01391
Citation: Yang Li, Wang Xiao-xiang, Zhao Kun. Cooperative Spectrum Sensing Algorithm in Multi-antenna Cognitive Radio[J]. Journal of Electronics & Information Technology, 2009, 31(10): 2338-2342. doi: 10.3724/SP.J.1146.2008.01391

Cooperative Spectrum Sensing Algorithm in Multi-antenna Cognitive Radio

doi: 10.3724/SP.J.1146.2008.01391
  • Received Date: 2008-10-27
  • Rev Recd Date: 2009-03-23
  • Publish Date: 2009-10-19
  • Being different from previous spectrum sensing research for single-antenna cognitive users, a spectrum sensing algorithm based on optimal power allocation and cooperative diversity under multi-antenna scenario is proposed. It used Sigular Value Decomposition(SVD) to implement power water-filling on each antenna based on channel condition, and the detection process of the cooperative spectrum sensing for the primary user is considered in the two-user network with multi-antenna. The ergodic capacity, detection probability and detection time in cognitive network with multi-antenna are analyzed with path-loss model based on exponential attenuation. Theory analysis and simulation results show that cognitive users with multi-antenna can not only make the cognitive network have maximal ergodic capacity, but also improve detection performance of the system through optimal power allocation and cooperative spectrum sensing.
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