A robust adaptive beamformer is proposed using the near field regionally constrained adaptive approach that designs a set of linear constraints by filtering on a low rank subspace of the near field signal over a spatial region and a wide frequency band. This method can accurately control the beam-former response over the designed spatial-temporal region using a small number of linear constraint vectors and improve the robustness against target location errors. Meanwhile, this method enhances the capability of the near field beamformer in distance discrimination without additional constraints so that interference impinging at the same direction as the desired signal but at a different distance can be effectively suppressed.
Y. R. Zheng et al., "Robustness and Distance Discrimination of Adaptive Near Field Beamformers," Proceedings of the IEEE International Conference on Acoustics Speech and Signal Processing, 2006, Institute of Electrical and Electronics Engineers (IEEE), Jan 2006.
The definitive version is available at http://dx.doi.org/10.1109/ICASSP.2006.1661150
IEEE International Conference on Acoustics Speech and Signal Processing, 2006
Electrical and Computer Engineering
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 2006 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.