A novel method for periodic interference suppression on local telephone loops

Author

Keratiotis, George ; Lind, Larry ; Cook, John W. ; Patel, Minesh ; Whelan, Pete ; Croft, Dave ; Hughes, Pete

Author_Institution

Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK

Volume

47

Issue

7

fYear

2000

fDate

7/1/2000 12:00:00 AM

Firstpage

1096

Lastpage

1100

Abstract

An efficient method for real-time periodic interference suppression on telephone lines is proposed. The periodicity of the interference Is exploited by an adaptive phase-locked buffer (APLB), which is used to create the antiphase noise replica. Computer simulations are used to compare the APLB approach with the traditional least mean squares (LMS) algorithm in an adaptive noise cancellation configuration. The new technique outperforms the LMS noise canceller and proves to be a very efficient solution to the power line interference problem

Keywords

adaptive signal processing; digital phase locked loops; interference suppression; subscriber loops; synchronisation; telephone interference; twisted pair cables; APLB noise canceller; adaptive noise cancellation configuration; adaptive phase-locked buffer; antiphase noise replica; digital PLL; local telephone loops; periodic interference suppression; power line interference problem; real-time interference suppression; telephone lines; Adaptive algorithm; Delta modulation; Finite impulse response filter; Frequency; Interference suppression; Least squares approximation; Noise cancellation; Phase noise; Telephony; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on

Publisher

ieee

ISSN

1057-7122

Type

jour

DOI

10.1109/81.855467

Filename

855467