A DOA Estimation Method For an Arbitrary Triangular Microphone Arrangement

This paper proposes a new DOA (direction of arrival) estimation method for an arbitrary triangular microphone arrangement. Using the phase rotation factors for the crosscorrelations between the adjacent-microphone signals, a general form of the integrated cross spectrum is derived. DOA estimation is reduced to a non-linear optimization problem of the general integrated cross spectrum. It is shown that a conventional DOA estimation for the equilateral triangular microphone arrangement is a special case of the proposed method. Sensitivity to the relative time-delay is derived in a closed form and demonstrated for different microphone arrangements. Simulation results demonstrate that the deviation of estimation error in the case of 20 dB SNR is less than 1 degree which is comparable to high resolution DOA estimation methods.

Published in:
European Signal Processing Conference 2006 (EUSIPCO 2006)
Presented at:
European Signal Processing Conference 2006, Florence, September 4-8

 Record created 2009-06-01, last modified 2018-03-18

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