Chebyshev optimization for the design of broadband beamformers in the near field

Author

Nordholm, S.E. ; Rehbock, V. ; Tee, K.L. ; Nordebo, S.

Author_Institution

Dept. of Signal Process., Karlskroniv Univ., Ronneby, Sweden

Volume

45

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

141

Lastpage

143

Abstract

The use of microphone arrays for video conferences, hands-free mobile telephony and computer applications has created the demand for near-field broadband beamformer design methods. Here, a general broadband beamformer design problem is formulated as a weighted Chebyshev optimization problem, and a method to solve the resulting functionally-constrained problem is presented. The formulation can also be applied to the design of multidimensional digital finite-impulse response (FIR) filters with an arbitrarily specified amplitude and phase. Numerical results that demonstrate the minimax near-field behavior of the designed beamformers are given

Keywords

FIR filters; array signal processing; multidimensional digital filters; optimisation; Chebyshev optimization; broadband beamformer; computer application; design; hands-free mobile telephony; microphone array; multidimensional digital FIR filter; near field; video conference; Chebyshev approximation; Computer applications; Design methodology; Design optimization; Finite impulse response filter; Microphone arrays; Mobile computing; Multidimensional systems; Telephony; Videoconference;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.659466

Filename

659466