DocumentCode :
1184173
Title :
Adaptive eigensubspace algorithms for direction or frequency estimation and tracking
Author :
Yang, Jar-Ferr ; Kaveh, Mostafa
Author_Institution :
Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA
Volume :
36
Issue :
2
fYear :
1988
fDate :
2/1/1988 12:00:00 AM
Firstpage :
241
Lastpage :
251
Abstract :
The authors present an adaptive estimator of the complete noise or signal subspace of a sample covariance matrix as well as the estimator´s practical implementations. The general formulation of the proposed estimator results from an asymptotic argument, which shows the signal or noise subspace computation to be equivalent to a constrained gradient search procedure. A highly parallel algorithm, denoted the inflation method, is introduced for the estimation of the noise subspace. The simulation results of these adaptive estimators show that the adaptive subspace algorithms perform substantially better than P.A. Thompson´s (1980) adaptive version of V.F. Pisarenko´s technique (1973) in estimating frequencies or directions of arrival (DOA) of plane waves. For tracking nonstationary parameters, the simulation results also show that the adaptive subspace algorithms are better than direct eigendecomposition methods for which computational complexity is much higher than the adaptive versions
Keywords :
signal processing; adaptive eigensubspace algorithms; adaptive estimator; computational complexity; constrained gradient search; covariance matrix; directions of arrival; frequency estimation; inflation method; noise subspace; nonstationary parameters tracking; parallel algorithm; plane waves; signal processing; signal subspace; simulation; Computational complexity; Computational modeling; Covariance matrix; Direction of arrival estimation; Eigenvalues and eigenfunctions; Frequency estimation; Multiple signal classification; Sensor arrays; Signal processing; Subspace constraints;
fLanguage :
English
Journal_Title :
Acoustics, Speech and Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
0096-3518
Type :
jour
DOI :
10.1109/29.1516
Filename :
1516
Link To Document :
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