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Paper Abstract and Keywords
Presentation 2007-03-16 11:10
On a soft-input and output iterative decoding algorithm for Reed-Solomon codes
Hitoshi Tokushige, Kenichi Arimoto, Masami Mohri, Yasutada Oohama (Univ. of Tokushima)
Abstract (in Japanese) (See Japanese page) 
(in English) Iterative decoding algorithms for Reed-Solomon (RS) product codes have been proposed. In one of the iterative decoding algorithms, a soft-input iterative bounded-distance decoding algorithm is applied to the constituent codes. The bounded-distance decoding corrects up to t_{0} (\triangleq \lfloor (d_{\min} - 1) / 2\rfloor) where d_{\min} is the minimum distance of a RS code, and generates at the most one candidate codeword. And then soft-output values are calculated using the candidate codewords generated in the iterative bounded-distance decoding algorithm. The soft-output values are used as soft-input values at the next decoding stage. Because the number of the generated candidate codewords is not large, the quality of the soft-output values is not good enough. This fact causes that the iterative decoding algorithm can not achieve good error performance. In this paper, we study a soft-input iterative bounded-distance+1 decoding algorithm for RS codes in which bounded-distance+1 decoding that corrects up $t_{0} + 1$ errors and generates candidate codewords with a relatively large number, is performed. Simulations were made to evaluate the error performances, the average numbers of generated candidate codewords and the quality of soft-output values over additive white Gaussian noise channel using binary phase shift keying modulation. From the results, we show that the iterative bounded-distance+1 decoding algorithm is better than the iterative bounded-distance decoding algorithm.
Keyword (in Japanese) (See Japanese page) 
(in English) Reed-Solomon code / iterative decoding / Bounded distance decoding / soft-output value / / / /  
Reference Info. IEICE Tech. Rep., vol. 106, no. 595, IT2006-112, pp. 161-166, March 2007.
Paper # IT2006-112 
Date of Issue 2007-03-09 (IT, ISEC, WBS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee IT ISEC WBS  
Conference Date 2007-03-15 - 2007-03-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Gunma Univ. (Kiryu Campus) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IT 
Conference Code 2007-03-IT-ISEC-WBS 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On a soft-input and output iterative decoding algorithm for Reed-Solomon codes 
Sub Title (in English)  
Keyword(1) Reed-Solomon code  
Keyword(2) iterative decoding  
Keyword(3) Bounded distance decoding  
Keyword(4) soft-output value  
1st Author's Name Hitoshi Tokushige  
1st Author's Affiliation University of Tokushima (Univ. of Tokushima)
2nd Author's Name Kenichi Arimoto  
2nd Author's Affiliation University of Tokushima (Univ. of Tokushima)
3rd Author's Name Masami Mohri  
3rd Author's Affiliation University of Tokushima (Univ. of Tokushima)
4th Author's Name Yasutada Oohama  
4th Author's Affiliation University of Tokushima (Univ. of Tokushima)
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Speaker Author-1 
Date Time 2007-03-16 11:10:00 
Presentation Time 25 minutes 
Registration for IT 
Paper # IT2006-112, ISEC2006-167, WBS2006-109 
Volume (vol) vol.106 
Number (no) no.595(IT), no.597(ISEC), no.599(WBS) 
Page pp.161-166 
Date of Issue 2007-03-09 (IT, ISEC, WBS) 

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