An adaptive decision feedback equalizer using error feedback

Author

Kim, D.W. ; Han, S.H. ; Eun, M.S. ; Choi, J.S. ; Cho, Y.S.

Author_Institution

Dept. of Electron. Eng., Chungang Univ., Seoul, South Korea

Volume

42

Issue

3

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

468

Lastpage

477

Abstract

The decision feedback equalizer (DFE) can compensate for channels with severe intersymbol interference (ISI) without as much noise enhancement as the linear equalizer (LE). We propose a new DFE which can increase the performance of the DFE further by using error feedback. The performance increase is achieved by reducing the error signal correlation (using an error feedback filter), which cannot be reduced by the feedforward or feedback filter. The hardware complexity for the proposed approach is minimal since it requires only the addition of a few taps to the conventional DFE. Based on theoretical analysis and computer simulations, the proposed approach is shown to be much more effective than the conventional DFE, especially for channels with large ISI and small AWGN

Keywords

Gaussian channels; adaptive equalisers; circuit feedback; correlation methods; decision feedback equalisers; filtering theory; intersymbol interference; AGN channel; ISI; adaptive decision feedback equalizer; computer simulations; error feedback filter; error signal correlation; hardware complexity; intersymbol interference; performance; telecommunication channels; Additive noise; Computer errors; Decision feedback equalizers; Distortion; Feedback loop; Filters; Gaussian noise; Hardware; Intersymbol interference; Signal processing algorithms;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.536144

Filename

536144