Title :
Combined Beamforming and Noise Cancellation
Author :
Dmochowski, Jacek ; Goubran, Rafik
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont.
Abstract :
This paper examines microphone-array-based, combined beamformer-noise canceller structures. The performance of the structures is evaluated using computer simulation as well as experimental measurements. The inter-operation of the beamformer and noise canceller is studied by measuring the SNR improvements offered by the respective components. An experimental procedure for evaluating output SNR is presented: the desired signal is captured from a set location in the recording environment. The noise signal is measured from a second (generally different) location. Results reveal an SNR improvement of up to 17 dB, and are compared to those stemming from conventional approaches
Keywords :
acoustic signal processing; array signal processing; interference suppression; microphone arrays; adaptive noise cancellation; beamformers; generalized sidelobe canceller; microphone arrays; Adaptive arrays; Adaptive filters; Array signal processing; Microphone arrays; Microwave integrated circuits; Noise cancellation; Noise figure; Noise measurement; Sensor arrays; Signal to noise ratio; adaptive noise cancellation; beamforming; generalized sidelobe canceller; microphone arrays;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-8879-8
DOI :
10.1109/IMTC.2005.1604297
