Non-linear, adaptive array processing for acoustic interferencesuppression

摘要

A method is introduced where blind source separation of acoustical sources is combined with spatialprocessing to remove non-Gaussian, broadband interferers from space-time displays such as bearingtrack recorder displays. This differs from most standard techniques such as generalized sidelobecancellers in that the separation of signals is not done spatially. The algorithm performance iscompared to adaptive beamforming techniques such as minimum variance distortionless responsebeamforming. Simulations and experiments using two acoustic sources were used to verify theperformance of the algorithm. Simulations were also used to determine the effectiveness of thealgorithm under various signal to interference, signal to noise, and array geometry conditions. Avoice activity detection algorithm was used to benchmark the performance of the sourceisolation.