DocumentCode :
1673413
Title :
Robust MIMO cognitive radio systems under temperature interference constraints
Author :
Yang Yang ; Song, Peter ; Scutari, Gesualdo ; Palomar, Daniel P.
Author_Institution :
Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Tech., Hong Kong, China
fYear :
2013
Firstpage :
4504
Lastpage :
4508
Abstract :
In cognitive radio (CR) systems, the primary users (PU) are protected by temperature interference constraints imposed on secondary users (SU). However, such limitations may be easily violated by SUs if perfect SU-to-PU channel state information (CSI) is not available at the secondary transmitters. In this paper, we propose a novel and distributed design of MIMO CR networks that is robust against imperfect SU-to-PU CSI. Specifically, we formulate the system design as a noncooperative game and robust global interference constraints are enforced via pricing; the prices are thus additional variables to be optimized. Building on the advanced and new theory of finite-dimensional variational inequalities (VI) in the complex domain, we analyze the proposed NE problem and devise alternative distributed algorithms along with their convergence properties.
Keywords :
MIMO communication; cognitive radio; radiofrequency interference; wireless channels; CR systems; CSI; MIMO CR networks; PU channel state information; SU; VI; distributed algorithms; distributed design; finite dimensional variational inequalities; primary users; robust MIMO cognitive radio systems; robust global interference constraints; secondary users; temperature interference constraints; Cognitive radio; Distributed algorithms; Games; Interference constraints; MIMO; Robustness; Cognitive Radio System; MIMO System; Temperature Interference Constraints; Variational Inequalities; Worst-Case Robust Design;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference on
Conference_Location :
Vancouver, BC
ISSN :
1520-6149
Type :
conf
DOI :
10.1109/ICASSP.2013.6638512
Filename :
6638512
Link To Document :
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