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Design of Fixed-Point Processing Based Turbo Codes Using Extrinsic Information Transfer Charts

Li, Liang, Maunder, Robert G., Al-Hashimi, Bashir M. and Hanzo, Lajos (2010) Design of Fixed-Point Processing Based Turbo Codes Using Extrinsic Information Transfer Charts At IEEE Vehicular Technology Conference, Canada.

Record type: Conference or Workshop Item (Other)


The operand-width specifications in fixed-point hardware implementations of turbo code decoders is an important design issue, since this governs the trade-off between the decoder's performance and its complexity, cost, area and energy consumption. The investigation of this issue would be extremely time-consuming in the conventional approach, which relies upon Monte-Carlo simulation based Bit Error Ratio (BER) analysis. In this paper, we propose a generic design method, which uses EXtrinsic Information Transfer (EXIT) chart analysis to simplify this design process. Our method is not only an order of magnitude faster than the conventional Monte-Carlo simulation based approach, but also offers deeper insights into why performance degradations are imposed by insufficient operand-width specifications. The benefits of our generic method are demonstrated in the context of a turbo decoder, allowing accurate specifications to be obtained and compared to those suggested by previous works.

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Published date: 6 September 2010
Additional Information: Event Dates: September 2010
Venue - Dates: IEEE Vehicular Technology Conference, Canada, 2010-09-01
Keywords: Extrinsic Information Transfer chart, EXIT chart, Fixed-point, turbo code, UMTS
Organisations: Electronic & Software Systems, Southampton Wireless Group


Local EPrints ID: 270937
ISBN: 978-1-4244-3573-9
PURE UUID: e69c8027-7518-4cda-bc78-134c5ecc761f
ORCID for Robert G. Maunder: ORCID iD

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Date deposited: 28 Apr 2010 14:08
Last modified: 18 Jul 2017 06:49

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Author: Liang Li
Author: Robert G. Maunder ORCID iD
Author: Lajos Hanzo

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