A low-complexity turbo decoder architecture for energy-efficient wireless sensor networks


Li, Liang, Maunder, Robert G., Al-Hashimi, Bashir and Hanzo, Lajos (2011) A low-complexity turbo decoder architecture for energy-efficient wireless sensor networks IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 21, (1), pp. 14-22. (doi:10.1109/TVLSI.2011.2177104).

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Description/Abstract

Turbo codes have recently been considered for energy-constrained wireless communication applications, since they facilitate a low transmission energy consumption. However, in order to reduce the overall energy consumption, Look-Up- Table-Log-BCJR (LUT-Log-BCJR) architectures having a low processing energy consumption are required. In this paper, we decompose the LUT-Log-BCJR architecture into its most fundamental Add Compare Select (ACS) operations and perform them using a novel low-complexity ACS unit. We demonstrate that our architecture employs an order of magnitude fewer gates than the most recent LUT-Log-BCJR architectures, facilitating a 71% energy consumption reduction. Compared to state-of- the-art Maximum Logarithmic Bahl-Cocke-Jelinek-Raviv (Max- Log-BCJR) implementations, our approach facilitates a 10% reduction in the overall energy consumption at ranges above 58 m.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1109/TVLSI.2011.2177104
ISSNs: 1063-8210 (print)
Keywords: energy-efficient, error-correcting code, turbo code, Log-BCJR algorithm
Subjects:
Organisations: Electronic & Software Systems, Southampton Wireless Group
ePrint ID: 271820
Date :
Date Event
2011e-pub ahead of print
January 2013Published
Date Deposited: 20 Dec 2010 15:32
Last Modified: 17 Apr 2017 18:06
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/271820

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