Technique for broadband correlated interference rejection in microphone arrays

Author

Ward, Darren B.

Author_Institution

Telecommun. Eng. Group, Australian Nat. Univ., Canberra, ACT, Australia

Volume

6

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

414

Lastpage

417

Abstract

A new technique for broadband minimum variance beam-forming is presented that overcomes the signal cancellation problem of conventional adaptive beamformers in the presence of correlated interference. Specifically, frequency-invariant beam-forming is used to perform frequency domain averaging, thereby reducing the correlation between the desired signal and the interference. Such a technique is useful for hands-free speech acquisition using a microphone array, since correlated interference will be present due to room reflections

Keywords

acoustic correlation; acoustic transducer arrays; array signal processing; frequency-domain analysis; interference (signal); interference suppression; microphones; speech processing; adaptive beamformers; broadband correlated interference rejection technique; broadband minimum variance beam-forming; frequency domain averaging; frequency-invariant beam-forming; hands-free speech acquisition; microphone arrays; room reflections; signal cancellation problem; Adaptive arrays; Array signal processing; Covariance matrix; Frequency domain analysis; Interference cancellation; Microphone arrays; Optical reflection; Power generation; Sensor arrays; Speech;

fLanguage

English

Journal_Title

Speech and Audio Processing, IEEE Transactions on

Publisher

ieee

ISSN

1063-6676

Type

jour

DOI

10.1109/89.701375

Filename

701375