DocumentCode :
899909
Title :
Performance study of the minimax robust phased array for wireless communications
Author :
Katkovnik, Vladimir ; Lee, Moon-Sik ; Kim, Yong-Hoon
Author_Institution :
Signal Process. Lab, Tampere Univ. of Technol., Finland
Volume :
54
Issue :
4
fYear :
2006
fDate :
4/1/2006 12:00:00 AM
Firstpage :
608
Lastpage :
613
Abstract :
In this paper, new robust M-estimation techniques are developed for combating impulsive noise and multiple-access interference in communication systems. Power functions of the proposed robust estimators are obtained by minimizing a nonquadratic residual function derived from the Huber´s minimax robust estimation theory. Maximum peaks of these power functions are used for estimation of communication signals as well as direction of arrival. A strong advantage of the proposed robust M-estimation algorithms is a decreased sensitivity of the estimates with respect to an actual unknown distribution of random noises and interferences. Simulation results demonstrate that the proposed robust algorithms, the robust median, and robust Huber estimators, offer significant performance gain over the conventional and minimum-variance distortionless-response estimators, with the best results given by the robust Huber estimator.
Keywords :
antenna phased arrays; array signal processing; cellular radio; direction-of-arrival estimation; impulse noise; interference suppression; minimax techniques; multi-access systems; radiofrequency interference; wireless channels; Huber estimators; direction of arrival estimation; impulsive noise; minimax robust phased array; multiple-access interference; nonquadratic residual function; robust Huber estimators; robust M -estimation techniques; wireless cellular communications; Communication systems; Degradation; Direction of arrival estimation; Minimax techniques; Multiple access interference; Noise level; Noise robustness; Phased arrays; Sensor arrays; Wireless communication; Antenna array; direction-of-arrival (DOA) estimation; impulsive noise; wireless communications;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2006.873068
Filename :
1621163
Link To Document :
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