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

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4 Author(s)
S. E. Nordholm ; Dept. of Signal Process., Karlskroniv Univ., Ronneby, Sweden ; V. Rehbock ; K. L. Tee ; S. Nordebo

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

Published in:

IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing  (Volume:45 ,  Issue: 1 )