Pipelined adaptive DFE architectures

Naresh R. Shanbhag, Keshab K. Parhi

Research output: Contribution to journalConference article

Abstract

Fine-grain pipelined adaptive decision-feedback equalizer (ADFE) architectures are developed using the relaxed look-ahead technique. This technique, which is an approximation to the conventional look-ahead computation, maintains functionality of the algorithm rather than the input-output behavior. Thus, it results in substantial hardware savings as compared to either parallel processing or look-ahead techniques. The delay relaxation, delay transfer relaxation and sum relaxation are introduced for purposes of pipelining. Both the conventional and the predictor form of ADFE have been pipelined. The performance of the pipelined algorithms for the equalization of a magnetic recording channel is studied. It is demonstrated via simulations that, for a byte error rate of 10-7 or less, speed-ups of up to 8 can be easily achieved with the conventional ADFE. The predictor form of ADFE allows much higher speed-ups (up to 32) for less than 1 dB of SNR degradation.

Original languageEnglish (US)
Pages (from-to)134-145
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume2027
DOIs
StatePublished - Nov 1 1993
EventAdvanced Signal Processing Algorithms, Architectures, and Implementations IV 1993 - San Diego, United States
Duration: Jul 11 1993Jul 16 1993

Fingerprint

Decision Feedback
Decision feedback equalizers
Equalizer
Look-ahead
Predictors
Pipelining
Magnetic recording
Equalization
magnetic recording
Parallel Processing
predictions
Error Rate
hardware
Degradation
High Speed
high speed
Hardware
degradation
Architecture
output

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Pipelined adaptive DFE architectures. / Shanbhag, Naresh R.; Parhi, Keshab K.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 2027, 01.11.1993, p. 134-145.

Research output: Contribution to journalConference article

@article{641f713d2a1f43d08602fcc03f363d54,
title = "Pipelined adaptive DFE architectures",
abstract = "Fine-grain pipelined adaptive decision-feedback equalizer (ADFE) architectures are developed using the relaxed look-ahead technique. This technique, which is an approximation to the conventional look-ahead computation, maintains functionality of the algorithm rather than the input-output behavior. Thus, it results in substantial hardware savings as compared to either parallel processing or look-ahead techniques. The delay relaxation, delay transfer relaxation and sum relaxation are introduced for purposes of pipelining. Both the conventional and the predictor form of ADFE have been pipelined. The performance of the pipelined algorithms for the equalization of a magnetic recording channel is studied. It is demonstrated via simulations that, for a byte error rate of 10-7 or less, speed-ups of up to 8 can be easily achieved with the conventional ADFE. The predictor form of ADFE allows much higher speed-ups (up to 32) for less than 1 dB of SNR degradation.",
author = "Shanbhag, {Naresh R.} and Parhi, {Keshab K.}",
year = "1993",
month = "11",
day = "1",
doi = "10.1117/12.160429",
language = "English (US)",
volume = "2027",
pages = "134--145",
journal = "Proceedings of SPIE - The International Society for Optical Engineering",
issn = "0277-786X",
publisher = "SPIE",

}

TY - JOUR

T1 - Pipelined adaptive DFE architectures

AU - Shanbhag, Naresh R.

AU - Parhi, Keshab K.

PY - 1993/11/1

Y1 - 1993/11/1

N2 - Fine-grain pipelined adaptive decision-feedback equalizer (ADFE) architectures are developed using the relaxed look-ahead technique. This technique, which is an approximation to the conventional look-ahead computation, maintains functionality of the algorithm rather than the input-output behavior. Thus, it results in substantial hardware savings as compared to either parallel processing or look-ahead techniques. The delay relaxation, delay transfer relaxation and sum relaxation are introduced for purposes of pipelining. Both the conventional and the predictor form of ADFE have been pipelined. The performance of the pipelined algorithms for the equalization of a magnetic recording channel is studied. It is demonstrated via simulations that, for a byte error rate of 10-7 or less, speed-ups of up to 8 can be easily achieved with the conventional ADFE. The predictor form of ADFE allows much higher speed-ups (up to 32) for less than 1 dB of SNR degradation.

AB - Fine-grain pipelined adaptive decision-feedback equalizer (ADFE) architectures are developed using the relaxed look-ahead technique. This technique, which is an approximation to the conventional look-ahead computation, maintains functionality of the algorithm rather than the input-output behavior. Thus, it results in substantial hardware savings as compared to either parallel processing or look-ahead techniques. The delay relaxation, delay transfer relaxation and sum relaxation are introduced for purposes of pipelining. Both the conventional and the predictor form of ADFE have been pipelined. The performance of the pipelined algorithms for the equalization of a magnetic recording channel is studied. It is demonstrated via simulations that, for a byte error rate of 10-7 or less, speed-ups of up to 8 can be easily achieved with the conventional ADFE. The predictor form of ADFE allows much higher speed-ups (up to 32) for less than 1 dB of SNR degradation.

UR - http://www.scopus.com/inward/record.url?scp=84947661014&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84947661014&partnerID=8YFLogxK

U2 - 10.1117/12.160429

DO - 10.1117/12.160429

M3 - Conference article

AN - SCOPUS:84947661014

VL - 2027

SP - 134

EP - 145

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

ER -