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Cooperative Spectrum Sensing Using Free Probability Theory

Lei WANG, Baoyu ZHENG, Qingmin MENG, Chao CHEN

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Summary :

Free probability theory, which has become a main branch of random matrix theory, is a valuable tool for describing the asymptotic behavior of multiple systems, especially for large matrices. In this paper, using asymptotic free probability theory, a new cooperative scheme for spectrum sensing is proposed, which shows how the asymptotic free behavior of random matrices and the property of Wishart distribution can be used to assist spectrum sensing for cognitive radio. Simulations over Rayleigh fading and AWGN channels demonstrate the proposed scheme has better detection performance than the energy detection techniques and the Maximum-minimum eigenvalue (MME) scheme even for the case of a small sample of observations.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.6 pp.1547-1554
Publication Date
2010/06/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.1547
Type of Manuscript
PAPER
Category
Wireless Communication Technologies

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