DocumentCode :
3237313
Title :
A Practical Adaptive Blind Multichannel Estimation Algorithm with Application to Acoustic Impulse Responses
Author :
Ahmad, Rehan ; Khong, Andy W H ; Naylor, Patrick A.
Author_Institution :
Imperial Coll. London, London
fYear :
2007
fDate :
1-4 July 2007
Firstpage :
31
Lastpage :
34
Abstract :
We propose a noise robust adaptive blind multichannel identification algorithm for acoustic impulse responses. It has been known that the normalized multichannel frequency domain least-mean-square (NMCFLMS) algorithm misconverges under low signal-to- noise ratio. The coefficients of NMCFLMS converge initially toward the true impulse response after which they then misconverge. The extended NMCFLMS (ext-NMCFLMS) algorithm which has been proposed to mitigate this misconvergence problem assumes the knowledge of magnitude and time-differences-of-arrival (TDOA) of the direct paths for the acoustic impulse responses. In this work, we show how the TDOA can be obtained. More importantly, we present a novel approach to estimate the magnitude of the direct path component under practical conditions. We then show how these estimates can be incorporated to the proposed ext-NMCFLMS with direct path estimation algorithm. We analyze how errors in these estimates affect the performance of the proposed algorithm.
Keywords :
acoustic signal processing; adaptive signal processing; time-of-arrival estimation; acoustic impulse responses; adaptive estimation algorithm; blind multichannel estimation algorithm; direct path estimation algorithm; multichannel identification algorithm; normalized multichannel frequency domain least-mean-square algorithm; signal-to-noise ratio; time-differences-of-arrival; Acoustic applications; Acoustic noise; Adaptive signal processing; Educational institutions; Filters; Frequency domain analysis; Iterative algorithms; Microphone arrays; Noise robustness; Signal processing algorithms; Blind channel identification; adaptive signal processing; time-delay estimation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Digital Signal Processing, 2007 15th International Conference on
Conference_Location :
Cardiff
Print_ISBN :
1-4244-0882-2
Electronic_ISBN :
1-4244-0882-2
Type :
conf
DOI :
10.1109/ICDSP.2007.4288511
Filename :
4288511
Link To Document :
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