Low-Complexity Multiple-Component Turbo Decoding Aided Hybrid ARQ
Low-Complexity Multiple-Component Turbo Decoding Aided Hybrid ARQ
Previous research has focused on improving the throughput of Hybrid Automatic Repeat reQuest (HARQ) schemes. However, since turbo codes have been introduced into HARQ schemes, their complexity has increased owing to the iterative Bahl, Cocke, Jelinek and Raviv (BCJR) operations that are required following each retransmission. This paper explores the complexity of turbo HARQ schemes and proposes a new Early Stopping (ES) approach for iterative decoding based on Mutual Information (MI), which dynamically determines the appropriate number of BCJR operations to be performed following each Incremental-Redundancy (IR) transmission. We demonstrate that the proposed ES based Multiple-Component Turbo Code (MCTC) aided and systematic Twin-Component Turbo Code (TCTC) assisted HARQ schemes exhibit a 60% to 85% reduced complexity for SNRs below -2dB, without degrading the Packet Loss Ratio (PLR) and the throughput.
1571-1577
Chen, Hong
0f30c1b9-7831-4010-a81c-c6825f78af16
Maunder, Robert G.
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
15 May 2011
Chen, Hong
0f30c1b9-7831-4010-a81c-c6825f78af16
Maunder, Robert G.
76099323-7d58-4732-a98f-22a662ccba6c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Chen, Hong, Maunder, Robert G. and Hanzo, Lajos
(2011)
Low-Complexity Multiple-Component Turbo Decoding Aided Hybrid ARQ.
IEEE Transactions on Vehicular Technology, 60 (4), .
(doi:10.1109/TVT.2011.2132766).
Abstract
Previous research has focused on improving the throughput of Hybrid Automatic Repeat reQuest (HARQ) schemes. However, since turbo codes have been introduced into HARQ schemes, their complexity has increased owing to the iterative Bahl, Cocke, Jelinek and Raviv (BCJR) operations that are required following each retransmission. This paper explores the complexity of turbo HARQ schemes and proposes a new Early Stopping (ES) approach for iterative decoding based on Mutual Information (MI), which dynamically determines the appropriate number of BCJR operations to be performed following each Incremental-Redundancy (IR) transmission. We demonstrate that the proposed ES based Multiple-Component Turbo Code (MCTC) aided and systematic Twin-Component Turbo Code (TCTC) assisted HARQ schemes exhibit a 60% to 85% reduced complexity for SNRs below -2dB, without degrading the Packet Loss Ratio (PLR) and the throughput.
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HybridArqComplexity_1.pdf
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Published date: 15 May 2011
Organisations:
Southampton Wireless Group
Identifiers
Local EPrints ID: 271520
URI: http://eprints.soton.ac.uk/id/eprint/271520
ISSN: 0018-9545
PURE UUID: 1821cfd4-1797-41fa-8e04-b04f1b61da8e
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Date deposited: 07 Sep 2010 15:00
Last modified: 18 Mar 2024 03:09
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Author:
Hong Chen
Author:
Robert G. Maunder
Author:
Lajos Hanzo
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