DocumentCode :
1653571
Title :
A novel method for partially adaptive broadband beamforming
Author :
Liu, Wei ; Weiss, Stephan ; Hanzo, Lajos
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
fYear :
2001
fDate :
6/23/1905 12:00:00 AM
Firstpage :
361
Lastpage :
372
Abstract :
A novel subband-selective generalized sidelobe canceller (GSC) for partially adaptive broadband beamforming is proposed. The blocking matrix of the GSC is constructed such that its columns constitute a series of bandpass filters, which select signals with specific direction of arrival angles and frequencies. This results in bandlimited spectra of the blocking matrix outputs, which is further exploited by subband decomposition and discarding the low-pass subbands appropriately prior to running independent unconstrained adaptive filters in each non-redundant subband. We also discuss the design of both the blocking matrix and the filter banks for the subsequent subband decomposition. By these steps, the computational complexity of our subband-selective GSC is greatly reduced compared to other adaptive GSC schemes, while performance is comparable or even enhanced due to subband decorrelation, as simulations indicate
Keywords :
adaptive filters; array signal processing; band-pass filters; channel bank filters; computational complexity; direction-of-arrival estimation; filtering theory; interference suppression; matrix algebra; spectral analysis; GSC; LMS-type adaptive algorithms; bandlimited spectra; bandpass filters; blocking matrix; computational complexity; direction of arrival angles; independent unconstrained adaptive filters; low-pass subbands; nonredundant subband; partially adaptive broadband beamforming; simulations; subband decomposition; subband decorrelation; subband-selective generalized sidelobe canceller; Adaptive filters; Array signal processing; Band pass filters; Computational complexity; Computer science; Decorrelation; Filter bank; Frequency; Matrix decomposition; Sensor arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Systems, 2001 IEEE Workshop on
Conference_Location :
Antwerp
ISSN :
1520-6130
Print_ISBN :
0-7803-7145-3
Type :
conf
DOI :
10.1109/SIPS.2001.957364
Filename :
957364
Link To Document :
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