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Modification of SOVA-based Algorithms for Efficient Hardware Implementation

Ang, Lay-Hong; Lim, Wee-Guan and Kamuf, Matthias LU (2010) IEEE Vehicular Technology Conference (VTC Spring), 2010 In IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010 p.1-5
Abstract
In this paper, a modified soft-output Viterbi algorithm (SOVA) is presented to enable efficient hardware implementation. The forward-only processing of the SOVA has an inherent lower latency than forward-backward algorithms such as BCJR and its offspring, which are commonly used in iterative decoders. Thus, SOVA-based architectures require less parallelization and therefore hardware for the same data throughput. A simplification is proposed to the Battail rule ( BR) SOVA to approximate the concurrent path reliability values with the corresponding metric differences. This simplified BR-SOVA (SB-SOVA) performs close to max-log-MAP. Furthermore, a novel hybrid decoding architecture is proposed that combines the simplicity of the original... (More)
In this paper, a modified soft-output Viterbi algorithm (SOVA) is presented to enable efficient hardware implementation. The forward-only processing of the SOVA has an inherent lower latency than forward-backward algorithms such as BCJR and its offspring, which are commonly used in iterative decoders. Thus, SOVA-based architectures require less parallelization and therefore hardware for the same data throughput. A simplification is proposed to the Battail rule ( BR) SOVA to approximate the concurrent path reliability values with the corresponding metric differences. This simplified BR-SOVA (SB-SOVA) performs close to max-log-MAP. Furthermore, a novel hybrid decoding architecture is proposed that combines the simplicity of the original Hagenauer rule and the performance-preserving properties of the SB-SOVA to trade implementation complexity for decoding performance. The hybrid approach is evaluated with practical link-level simulations of the downlink data channel in LTE Rel-8. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010
pages
1 - 5
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE Vehicular Technology Conference (VTC Spring), 2010
external identifiers
  • wos:000287515900282
  • scopus:77954939490
ISSN
1550-2252
DOI
10.1109/VETECS.2010.5493927
language
English
LU publication?
yes
id
6edb900f-a523-40f0-b3be-e05543c4c44d (old id 1859535)
date added to LUP
2011-04-20 09:29:32
date last changed
2018-05-29 11:53:39
@inproceedings{6edb900f-a523-40f0-b3be-e05543c4c44d,
  abstract     = {In this paper, a modified soft-output Viterbi algorithm (SOVA) is presented to enable efficient hardware implementation. The forward-only processing of the SOVA has an inherent lower latency than forward-backward algorithms such as BCJR and its offspring, which are commonly used in iterative decoders. Thus, SOVA-based architectures require less parallelization and therefore hardware for the same data throughput. A simplification is proposed to the Battail rule ( BR) SOVA to approximate the concurrent path reliability values with the corresponding metric differences. This simplified BR-SOVA (SB-SOVA) performs close to max-log-MAP. Furthermore, a novel hybrid decoding architecture is proposed that combines the simplicity of the original Hagenauer rule and the performance-preserving properties of the SB-SOVA to trade implementation complexity for decoding performance. The hybrid approach is evaluated with practical link-level simulations of the downlink data channel in LTE Rel-8.},
  author       = {Ang, Lay-Hong and Lim, Wee-Guan and Kamuf, Matthias},
  booktitle    = {IEEE 71st Vehicular Technology Conference (VTC 2010-Spring), 2010},
  issn         = {1550-2252},
  language     = {eng},
  pages        = {1--5},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Modification of SOVA-based Algorithms for Efficient Hardware Implementation},
  url          = {http://dx.doi.org/10.1109/VETECS.2010.5493927},
  year         = {2010},
}