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

Volume

3

fYear

1994

fDate

30 May-2 Jun 1994

Firstpage

57

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on

Conference_Location

London

Print_ISBN

0-7803-1915-X

Type

conf

DOI

10.1109/ISCAS.1994.409101

Filename

409101