Title :
Time delay estimation via generalized correlation with adaptive spatial prefiltering
Author :
Krolik, J. ; Eizenman, M. ; Pasupathy, S.
Author_Institution :
University of Toronto, Toronto, Ontario, Canada
Abstract :
In this paper, the use of adaptive beamforming prior to generalized correlation (GC) is demonstrated as a means of time delay estimate (TDE) bias reduction in interference dominated environments. Analysis of GC TDE bias with both minimum variance distortionless response and conventional delay-and-sum beamforming is given. At high interference-to-noise ratios, theoretical and simulation results indicate that the adaptive structure can facilitate improved delay estimation performance compared to conventional methods.
Keywords :
Acoustic distortion; Acoustic noise; Acoustic sensors; Analysis of variance; Array signal processing; Bandwidth; Delay effects; Delay estimation; Interference; Sensor arrays;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '86.
DOI :
10.1109/ICASSP.1986.1168903