Title :
Cooperative MIMO Spectrum Sensing Using Free Probability Theory
Author :
Wang, Lei ; Zheng, Baoyu ; Cui, Jingwu ; Meng, Qingmin
Author_Institution :
Inst. of Signal Process. & Transm., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
In this paper, using free probability theory, which is a valuable tool for describing the asymptotic behavior of multiple systems, especially for large matrices, a new cooperative MIMO scheme for spectrum sensing is proposed, which shows how asymptotic free property of random matrices and the property of Wishart distribution can be used to assist spectrum sensing in MIMO system for cognitive radios. Simulations over Rayleigh fading and AWGN channels demonstrate the proposed scheme has better detection performance compared with the energy detection techniques even for the case of a small sample of observations.
Keywords :
AWGN channels; MIMO communication; Rayleigh channels; matrix algebra; probability; AWGN channels; Rayleigh fading; Wishart distribution; asymptotic free property; cooperative MIMO spectrum sensing; energy detection techniques; free probability theory; random matrices; AWGN channels; Base stations; Chromium; Cognitive radio; MIMO; Rayleigh channels; Signal detection; Signal processing; Statistics; Wireless communication;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5303287
