Design of Fixed-Point Processing Based Turbo Codes Using Extrinsic Information Transfer Charts
Design of Fixed-Point Processing Based Turbo Codes Using Extrinsic Information Transfer Charts
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.
Extrinsic Information Transfer chart, EXIT chart, Fixed-point, turbo code, UMTS
978-1-4244-3573-9
Li, Liang
f8511be3-71c6-4792-a835-e8b2dfba8cdc
Maunder, Robert G.
76099323-7d58-4732-a98f-22a662ccba6c
Al-Hashimi, Bashir M.
0b29c671-a6d2-459c-af68-c4614dce3b5d
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
6 September 2010
Li, Liang
f8511be3-71c6-4792-a835-e8b2dfba8cdc
Maunder, Robert G.
76099323-7d58-4732-a98f-22a662ccba6c
Al-Hashimi, Bashir M.
0b29c671-a6d2-459c-af68-c4614dce3b5d
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
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.
IEEE Vehicular Technology Conference, Ottawa, Canada.
Record type:
Conference or Workshop Item
(Other)
Abstract
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, Ottawa, Canada, 2010-08-31
Keywords:
Extrinsic Information Transfer chart, EXIT chart, Fixed-point, turbo code, UMTS
Organisations:
Electronic & Software Systems, Southampton Wireless Group
Identifiers
Local EPrints ID: 270937
URI: http://eprints.soton.ac.uk/id/eprint/270937
ISBN: 978-1-4244-3573-9
PURE UUID: e69c8027-7518-4cda-bc78-134c5ecc761f
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Date deposited: 28 Apr 2010 14:08
Last modified: 07 Oct 2020 01:54
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Contributors
Author:
Liang Li
Author:
Robert G. Maunder
Author:
Bashir M. Al-Hashimi
Author:
Lajos Hanzo
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