Title :
On the estimation of bulk delay and length of dispersive region in echo cancellation
Author :
Hau, Simon S F ; Chan, Y.-H. ; Liu, Peter C K
Author_Institution :
Dept. of Electron. Eng., Hong Kong Polytech., Kowloon, Hong Kong
fDate :
30 May-2 Jun 1994
Abstract :
In this paper, the starting and ending position indices for far-end echo are estimated. A search algorithm is proposed to determine the position index using the centroid of the dispersive region as the initial starting point. Block processing algorithms are proposed for the smoothing of the estimated dispersive length. The results show that improvement can be obtained by increasing the block length. Further improvement can be obtained by using the instantaneous block LMS weight updating in the coefficient of echo canceller
Keywords :
delays; dispersion (wave); echo suppression; least mean squares methods; modems; telecommunication channels; block length; block processing algorithms; bulk delay; dispersive region length; echo cancellation; ending position indices; estimated dispersive length; far-end echo; instantaneous block LMS weight updating; position index; search algorithm; starting position indices; Consumer electronics; Delay effects; Delay estimation; Dispersion; Echo cancellers; Finite impulse response filter; Least squares approximation; Modems; Sampling methods; Smoothing methods;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409101
