Non-linear, adaptive array processing for acoustic interference suppression

Files
TR Number
Date
2009-06-01
Journal Title
Journal ISSN
Volume Title
Publisher
Acoustical Society of America
Abstract

A method is introduced where blind source separation of acoustical sources is combined with spatial processing to remove non-Gaussian, broadband interferers from space-time displays such as bearing track recorder displays. This differs from most standard techniques such as generalized sidelobe cancellers in that the separation of signals is not done spatially. The algorithm performance is compared to adaptive beamforming techniques such as minimum variance distortionless response beamforming. Simulations and experiments using two acoustic sources were used to verify the performance of the algorithm. Simulations were also used to determine the effectiveness of the algorithm under various signal to interference, signal to noise, and array geometry conditions. A voice activity detection algorithm was used to benchmark the performance of the source isolation.

Description
Keywords
Acoustic beamforming, Automatic speech recognition systems, Acoustic signal processing, Coherence, Entropy
Citation
Hoppe, E. A. & Roan, M. J. (2009). Non-linear, adaptive array processing for acoustic interference suppression. Journal of the Acoustical Society of America, 125(6), 3835-3843. doi: 10.1121/1.3126925