Pipelined parallel decision feedback decoders (PDFDS) for high speed Ethernet over copper

Yongru Gu, Keshab K. Parhi

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

Abstract

One of the powerful yet simple algorithms to decode trellis codes as well as to combat intersymbol interference (ISI) is the parallel decision-feedback decoding algorithm. However, for high-speed applications, such as Gigabit Ethernet over copper, the implementation and design of a parallel decision-feedback decoder (PDFD) is challenging due to the long critical path in the decoder structure. Straightforward pipelined designs usually introduce significant hardware overhead. To solve these problems, in this paper, first, based on an optimized scheduling of the computations in the parallel decision-feedback decoding algorithm, a low complexity pipelined PDFD is proposed. Next, we present a retiming and reformulation technique for the decision feedback unit (DFU) in the PDFD which can remove the DFU from the critical path of the PDFD with negligible hardware overhead. Compared with similar designs in the literature, the proposed design can reduce hardware overhead by 60% while achieving similar speedup for Gigabit Ethernet systems.

Original languageEnglish (US)
Title of host publication2005 IEEE ICASSP '05 - Proc. - Design and Implementation of Signal Proces.Syst.,Indust. Technol. Track,Machine Learning for Signal Proces. Education, Spec. Sessions
PublisherInstitute of Electrical and Electronics Engineers Inc.
PagesV121-V124
ISBN (Print)0780388747, 9780780388741
DOIs
StatePublished - Jan 1 2005
Event2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05 - Philadelphia, PA, United States
Duration: Mar 18 2005Mar 23 2005

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
VolumeV
ISSN (Print)1520-6149

Other

Other2005 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP '05
Country/TerritoryUnited States
CityPhiladelphia, PA
Period3/18/053/23/05

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