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

fYear

2009

fDate

24-26 Sept. 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/WICOM.2009.5303287

Filename

5303287