An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel

Seungwon Choi, Youngwha Kim, Tapan K. Sarkar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

An efficient procedure using the conjugate gradient method (CGM) is presented for adaptively computing the optimal set of coefficients for an echo canceler such that the solution can be obtained in a time-variant environment as well as in an ordinary time-invariant situation. By setting a functional which monotonically decreases at each iteration, the convergence is guaranteed for any signal matrix. The fast convergence of the CGM enables the proposed method to be applied in a nonstationary signal environment in which the optimal solution must be computed independently at each sampling period. Computer simulations indicate that the technique can be used for canceling echo signals much more efficiently than conventional methods in terms of the convergence speed and conformation of the convergence itself.

Original languageEnglish
Title of host publication41 IEEE Veh Technol Conf
PublisherPubl by IEEE
Pages149-154
Number of pages6
ISBN (Print)0879425822
StatePublished - 1991 May 1
Event41st IEEE Vehicular Technology Conference - St. Louis, MO, USA
Duration: 1991 May 191991 May 22

Other

Other41st IEEE Vehicular Technology Conference
CitySt. Louis, MO, USA
Period91/05/1991/05/22

Fingerprint

Conjugate gradient method
Conjugate Gradient Method
Telecommunications
Telecommunication
Conformations
Non-stationary Signal
Convergence Speed
Sampling
Conformation
Computer simulation
Computer Simulation
Optimal Solution
Iteration
Decrease
Invariant
Computing
Coefficient

Cite this

Choi, S., Kim, Y., & Sarkar, T. K. (1991). An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel. In 41 IEEE Veh Technol Conf (pp. 149-154). Publ by IEEE.
Choi, Seungwon ; Kim, Youngwha ; Sarkar, Tapan K. / An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel. 41 IEEE Veh Technol Conf. Publ by IEEE, 1991. pp. 149-154
@inproceedings{2d8445e88122418a8095ae0f14056a8a,
title = "An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel",
abstract = "An efficient procedure using the conjugate gradient method (CGM) is presented for adaptively computing the optimal set of coefficients for an echo canceler such that the solution can be obtained in a time-variant environment as well as in an ordinary time-invariant situation. By setting a functional which monotonically decreases at each iteration, the convergence is guaranteed for any signal matrix. The fast convergence of the CGM enables the proposed method to be applied in a nonstationary signal environment in which the optimal solution must be computed independently at each sampling period. Computer simulations indicate that the technique can be used for canceling echo signals much more efficiently than conventional methods in terms of the convergence speed and conformation of the convergence itself.",
author = "Seungwon Choi and Youngwha Kim and Sarkar, {Tapan K.}",
year = "1991",
month = "5",
day = "1",
language = "English",
isbn = "0879425822",
pages = "149--154",
booktitle = "41 IEEE Veh Technol Conf",
publisher = "Publ by IEEE",

}

Choi, S, Kim, Y & Sarkar, TK 1991, An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel. in 41 IEEE Veh Technol Conf. Publ by IEEE, pp. 149-154, 41st IEEE Vehicular Technology Conference, St. Louis, MO, USA, 91/05/19.

An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel. / Choi, Seungwon; Kim, Youngwha; Sarkar, Tapan K.

41 IEEE Veh Technol Conf. Publ by IEEE, 1991. p. 149-154.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel

AU - Choi, Seungwon

AU - Kim, Youngwha

AU - Sarkar, Tapan K.

PY - 1991/5/1

Y1 - 1991/5/1

N2 - An efficient procedure using the conjugate gradient method (CGM) is presented for adaptively computing the optimal set of coefficients for an echo canceler such that the solution can be obtained in a time-variant environment as well as in an ordinary time-invariant situation. By setting a functional which monotonically decreases at each iteration, the convergence is guaranteed for any signal matrix. The fast convergence of the CGM enables the proposed method to be applied in a nonstationary signal environment in which the optimal solution must be computed independently at each sampling period. Computer simulations indicate that the technique can be used for canceling echo signals much more efficiently than conventional methods in terms of the convergence speed and conformation of the convergence itself.

AB - An efficient procedure using the conjugate gradient method (CGM) is presented for adaptively computing the optimal set of coefficients for an echo canceler such that the solution can be obtained in a time-variant environment as well as in an ordinary time-invariant situation. By setting a functional which monotonically decreases at each iteration, the convergence is guaranteed for any signal matrix. The fast convergence of the CGM enables the proposed method to be applied in a nonstationary signal environment in which the optimal solution must be computed independently at each sampling period. Computer simulations indicate that the technique can be used for canceling echo signals much more efficiently than conventional methods in terms of the convergence speed and conformation of the convergence itself.

UR - http://www.scopus.com/inward/record.url?scp=0026159976&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0026159976

SN - 0879425822

SP - 149

EP - 154

BT - 41 IEEE Veh Technol Conf

PB - Publ by IEEE

ER -

Choi S, Kim Y, Sarkar TK. An adaptive echo canceller utilizing the conjugate gradient method in a time-variant telecommunication channel. In 41 IEEE Veh Technol Conf. Publ by IEEE. 1991. p. 149-154