Title :
A new beamformer for acoustic arrays based upon a constrained leaky LMS algorithm
Author :
Goh, B.A. ; McLernon, D.C.
Author_Institution :
Sch. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
A new broadband adaptive beamformer specifically applicable to microphone arrays has been proposed. This beamformer structure is the combination of a blocking matrix (BM) and a multiple canceller (MC) system, with a new leaky adaptive constrained beamformer (LACB). Simulation results show that this beamformer structure allows as large as ±30° target direction range while maintaining high interference reduction in the non-look direction, hi addition, this method only requires a small number of microphones arranged in a small space. Even when the signal-to-noise-ratio (SNR) is 0 dB, it still performs extremely well in interference suppression near the target directional of arrival (DOA) region.
Keywords :
acoustic arrays; acoustic signal processing; array signal processing; direction-of-arrival estimation; interference suppression; acoustic arrays; blocking matrix; broadband adaptive beamformer; constrained leaky LMS algorithm; directional of arrival region; interference suppression; leaky adaptive constrained beamformer; microphone arrays; multiple canceller system; signal-to-noise-ratio; Acoustic arrays; Adaptive arrays; Adaptive filters; Band pass filters; Information systems; Interference cancellation; Interference constraints; Least squares approximation; Microphone arrays; Signal processing algorithms;
Conference_Titel :
Signal Processing and Information Technology, 2003. ISSPIT 2003. Proceedings of the 3rd IEEE International Symposium on
Print_ISBN :
0-7803-8292-7
DOI :
10.1109/ISSPIT.2003.1341158
