Combined Beamforming and Noise Cancellation

Author

Dmochowski, Jacek ; Goubran, Rafik

Author_Institution

Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont.

Volume

2

fYear

2005

fDate

16-19 May 2005

Firstpage

1033

Lastpage

1037

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE

Conference_Location

Ottawa, Ont.

Print_ISBN

0-7803-8879-8

Type

conf

DOI

10.1109/IMTC.2005.1604297

Filename

1604297