DocumentCode :
290456
Title :
Adaptive subspace selection using subband decompositions for sensor array processing
Author :
Goldstein, J.S. ; Ingram, M.A. ; Holder, E.J. ; Smith, R.N.
Author_Institution :
Space Commun. Branch, USAF Rome Lab., Griffiss AFB, NY, USA
Volume :
iv
fYear :
1994
fDate :
19-22 April 1994
Abstract :
This paper considers the steady state behavior of adaptive processors. The use of a time-varying, minimum mean-square error searching, tree-structured filterbank is introduced to select the best subspace, in a least squares sense, for the adaptive processor with a predetermined number of adaptive coefficients. With the realistic assumption that the quantity of adaptive coefficients is the major computational restriction on the adaptive processor, it is shown that the time-varying filterbank allows the processor to achieve a lower minimum mean-square error than that which could be realized otherwise. The simple transform-domain least mean-square algorithms may be utilized to improve the dynamic behavior of the adaptive processor. These ideas are extended to the multidimensional filter case, and an example is presented via simulation for sensor array processing utilizing the generalized sidelobe canceller.<>
Keywords :
adaptive filters; adaptive signal processing; array signal processing; band-pass filters; filtering theory; least mean squares methods; time-varying filters; adaptive coefficients; adaptive processors; adaptive subspace selection; generalized sidelobe canceller; least squares; minimum mean-square error searching; multidimensional filter; sensor array processing; simulation; steady state behavior; subband decompositions; time-varying filterbank; transform-domain LMS algorithm; tree-structured filterbank; Adaptive filters; Application software; Array signal processing; Filter bank; Laboratories; Least squares methods; Sensor arrays; Space technology; Steady-state; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1994. ICASSP-94., 1994 IEEE International Conference on
Conference_Location :
Adelaide, SA, Australia
ISSN :
1520-6149
Print_ISBN :
0-7803-1775-0
Type :
conf
DOI :
10.1109/ICASSP.1994.389820
Filename :
389820
Link To Document :
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