Soft decision approaches for blind adaptive decision feedback equalizers

Wonzoo Chung; T. J. Endres; Chris Long; C. R. Johnson

doi:10.1109/SPAWC.2003.1319000

Soft decision approaches for blind adaptive decision feedback equalizers

Wonzoo Chung, T. J. Endres, Chris Long, C. R. Johnson

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

In this paper, we consider joint blind optimization schemes for decision feedback equalizer (DFE) coefficients and decision device, and propose adaptive solutions based on a soft decision device which combines a blind infinite impulse response (IIR) filtering adaptation and the conventional decision directed (DD) DFE adaptation. The benefits of our approach are mainly three-fold: 1) the initialization of DFE taps does not rely on a training sequence, 2) the transition between the (re}initialization period and the tracking period is continuous and consequently the equalizer exhibits robust performance under sudden time variation in the multipath channel, and 3) the optimized soft decision device mitigates error propagation of the DFE equalizer and further reduces mean square error (MSE) of DFE.

Original language	English
Title of host publication	2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	447-451
Number of pages	5
ISBN (Electronic)	078037858X
DOIs	https://doi.org/10.1109/SPAWC.2003.1319000
Publication status	Published - 2004
Externally published	Yes
Event	4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003 - Rome, Italy Duration: 2003 Jun 15 → 2003 Jun 18

Publication series

Name	IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC
Volume	2004-January

Other

Other	4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003
Country/Territory	Italy
City	Rome
Period	03/6/15 → 03/6/18

Bibliographical note

Publisher Copyright:
© 2003 IEEE.

ASJC Scopus subject areas

Electrical and Electronic Engineering
Computer Science Applications
Information Systems

Access to Document

10.1109/SPAWC.2003.1319000

Cite this

Chung, W., Endres, T. J., Long, C., & Johnson, C. R. (2004). Soft decision approaches for blind adaptive decision feedback equalizers. In 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003 (pp. 447-451). Article 1319000 (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2004-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/SPAWC.2003.1319000

Soft decision approaches for blind adaptive decision feedback equalizers. / Chung, Wonzoo; Endres, T. J.; Long, Chris et al.
2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003. Institute of Electrical and Electronics Engineers Inc., 2004. p. 447-451 1319000 (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC; Vol. 2004-January).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Chung, W, Endres, TJ, Long, C & Johnson, CR 2004, Soft decision approaches for blind adaptive decision feedback equalizers. in 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003., 1319000, IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, vol. 2004-January, Institute of Electrical and Electronics Engineers Inc., pp. 447-451, 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003, Rome, Italy, 03/6/15. https://doi.org/10.1109/SPAWC.2003.1319000

Chung W, Endres TJ, Long C, Johnson CR. Soft decision approaches for blind adaptive decision feedback equalizers. In 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003. Institute of Electrical and Electronics Engineers Inc. 2004. p. 447-451. 1319000. (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC). doi: 10.1109/SPAWC.2003.1319000

Chung, Wonzoo ; Endres, T. J. ; Long, Chris et al. / Soft decision approaches for blind adaptive decision feedback equalizers. 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2003. Institute of Electrical and Electronics Engineers Inc., 2004. pp. 447-451 (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC).

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abstract = "In this paper, we consider joint blind optimization schemes for decision feedback equalizer (DFE) coefficients and decision device, and propose adaptive solutions based on a soft decision device which combines a blind infinite impulse response (IIR) filtering adaptation and the conventional decision directed (DD) DFE adaptation. The benefits of our approach are mainly three-fold: 1) the initialization of DFE taps does not rely on a training sequence, 2) the transition between the (re}initialization period and the tracking period is continuous and consequently the equalizer exhibits robust performance under sudden time variation in the multipath channel, and 3) the optimized soft decision device mitigates error propagation of the DFE equalizer and further reduces mean square error (MSE) of DFE.",

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AB - In this paper, we consider joint blind optimization schemes for decision feedback equalizer (DFE) coefficients and decision device, and propose adaptive solutions based on a soft decision device which combines a blind infinite impulse response (IIR) filtering adaptation and the conventional decision directed (DD) DFE adaptation. The benefits of our approach are mainly three-fold: 1) the initialization of DFE taps does not rely on a training sequence, 2) the transition between the (re}initialization period and the tracking period is continuous and consequently the equalizer exhibits robust performance under sudden time variation in the multipath channel, and 3) the optimized soft decision device mitigates error propagation of the DFE equalizer and further reduces mean square error (MSE) of DFE.

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Soft decision approaches for blind adaptive decision feedback equalizers

Abstract

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