Modification of SOVA-based Algorithms for Efficient Hardware Implementation
(2010) IEEE Vehicular Technology Conference (VTC 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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1859535
- author
- Ang, Lay-Hong ; Lim, Wee-Guan and Kamuf, Matthias LU
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 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
- conference location
- Taipei, Taiwan
- conference dates
- 2010-05-16 - 2010-05-19
- 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
- 2016-04-01 14:59:01
- date last changed
- 2025-04-04 14:06:49
@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}}, doi = {{10.1109/VETECS.2010.5493927}}, year = {{2010}}, }