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A Class of Spectrum-Sensing Schemes for Cognitive Radio Under Impulsive Noise Circumstances: Structure and Performance in Nonfading and Fading Environments

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4 Author(s)
Hyun Gu Kang ; Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Korea ; Iickho Song ; Seokho Yoon ; Yun Hee Kim

In this paper, we propose a class of spectrum-sensing schemes for cognitive radio with receive diversity. By employing the generalized likelihood ratio test (GLRT) in the detectors on the antenna branches and exploiting a nonlinear diversity-combining strategy, the proposed scheme exhibits better performance than conventional schemes in various fading and noise environments. Exact expressions of the detection and false-alarm probabilities of the proposed scheme are derived in nonfading and Nakagami fading channels with Gaussian noise. Through computer simulations, it is confirmed that the proposed scheme provides a significant performance gain over conventional schemes in impulsive noise environments.

Published in:

IEEE Transactions on Vehicular Technology  (Volume:59 ,  Issue: 9 )