Pole-zero decision feedback equalization for the digital subscriber loop

Pedro Crespo*, Michael L. Honig

*Corresponding author for this work

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

3 Scopus citations

Abstract

A decision feedback equalizer (DFE) containing a feedback filter with both poles and zeros is proposed for high-speed digital communications over the subscriber loop. The feedback filter is composed of two sections: a relatively short finite-impulse-response (FIR) filter that cancels the initial part of the channel impulse response, which may contain rapid variations due to bridge taps, and a pole-zero filter than cancels the smoothly decaying tail of the impulse response. It is shown that the feedback filter can be adapted using existing infinite-impulse-response (IIR) adaptation techniques. Numerical results using a simulated subscriber loop impulse response show that a feedback filter with two poles adapted via a simplified gradient algorithm can offer significant improvement in mean squared error (MSE) (i.e., 3 to 4 dB at a signal-to-noise ratio of 20 dB) relative to a conventional DFE of the same complexity.

Original languageEnglish (US)
Title of host publicationGLOBECOM '90
PublisherPubl by IEEE
Pages1166-1171
Number of pages6
ISBN (Print)0879426322
StatePublished - Dec 1 1990
EventIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3) - San Diego, CA, USA
Duration: Dec 2 1990Dec 5 1990

Publication series

NameIEEE Global Telecommunications Conference and Exhibition
Volume2

Other

OtherIEEE Global Telecommunications Conference & Exhibition Part 3 (of 3)
CitySan Diego, CA, USA
Period12/2/9012/5/90

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Pole-zero decision feedback equalization for the digital subscriber loop'. Together they form a unique fingerprint.

  • Cite this

    Crespo, P., & Honig, M. L. (1990). Pole-zero decision feedback equalization for the digital subscriber loop. In GLOBECOM '90 (pp. 1166-1171). (IEEE Global Telecommunications Conference and Exhibition; Vol. 2). Publ by IEEE.