DocumentCode
1758750
Title
Joint Beamforming and Antenna Subarray Formation for MIMO Cognitive Radios
Author
Zeng, Xuan ; Li, Qifeng ; Zhang, Qi ; Qin, Jiahu
Author_Institution
Department of Electronics and Communications Engineering, Sun Yat-Sen University , Guangzhou , China
Volume
20
Issue
5
fYear
2013
fDate
41395
Firstpage
479
Lastpage
482
Abstract
The antenna subarray formation (ASF) is a promising technique for multiple-input multiple-output (MIMO) receiver. For MIMO cognitive radio systems, we propose a joint beamforming and ASF scheme in this letter which maximizes the cognitive achievable capacity subject to the peak transmit power constraint at the secondary transmitter, peak interference power constraint at the primary receiver, and the limited number of nonzero elements in the ASF matrix. To solve the joint optimization problem, we propose a relax-and-recover scheme. Simulation results have shown that the proposed scheme outperforms the conventional antenna selection scheme.
Keywords
Array signal processing; Covariance matrix; MIMO; Radio frequency; Receiving antennas; Antenna selection (AS); antenna subarray formation (ASF); beamforming; cognitive radio; multiple-input multiple-output (MIMO);
fLanguage
English
Journal_Title
Signal Processing Letters, IEEE
Publisher
ieee
ISSN
1070-9908
Type
jour
DOI
10.1109/LSP.2013.2252897
Filename
6479687
Link To Document