Title :
Adaptive estimation of a time-varying array shape using the tracking properties of the LMS algorithm
Author :
Marcos, Sylvie ; Macchi, Odile
Author_Institution :
Lab. des Signaux et Syst., Gif-sur-Yvette, France
Abstract :
The author deals with array processing using a flexible antenna whose shape is time-varying. The purpose is to improve the techniques of beamforming and source-bearing estimation by estimating the array shape in real time. The original contribution of this paper is the use of the capability of the LMS (least-mean-squares) algorithm in adapting a nonstationary environment in association with the knowledge of a pilot signal. Limitations concerning the variations that can be tracked are established and performance gains on beamforming and source-bearing estimation techniques are shown
Keywords :
filtering and prediction theory; least squares approximations; signal processing; LMS algorithm; adaptive estimation; adaptive filtering; array processing; beamforming; flexible antenna; least-mean-squares; source-bearing estimation; time-varying array shape; tracking properties; Acoustic sensors; Adaptive arrays; Adaptive estimation; Array signal processing; Fluctuations; Geometry; Least squares approximation; Sensor arrays; Sensor phenomena and characterization; Shape;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196897
