NDLI: High-speed re-encoder design for algebraic soft-decision Reed-Solomon decoding

Content Provider	IEEE Xplore Digital Library
Author	Jiangli Zhu Xinmiao Zhang
Copyright Year	2010
Description	Author affiliation: Case Western Reserve University (Jiangli Zhu; Xinmiao Zhang)
Abstract	Algebraic soft-decision decoding (ASD) of Reed-Solomon (RS) codes can provide substantial coding gain with polynomial complexity. The major steps of ASD algorithms are the interpolation and factorization. To greatly reduce the complexity of these steps, the re-encoding and coordinate transformation techniques need to be applied. The implementation of these techniques requires a re-encoder and an erasure decoder. In re-encoded and transformed ASD decoders, these two blocks take a significant proportion of the overall area requirement and may limit the maximum achievable speed. A novel re-encoder design is proposed in this paper. In the proposed design, the erasure locator and evaluator polynomials are computed directly through multiplications and other involved computations are reformulated to reduce latency and area requirement. Scalable architectures for the proposed re-encoder are developed. When these architectures are applied to a (255, 239) RS code, our re-encoder can achieve 82% higher throughput than the previous design with 11% less area. With minor modifications, the proposed design can also be used to implement an efficient erasure decoder.
Starting Page	465
Ending Page	468
File Size	247628
Page Count	4
File Format	PDF
ISBN	9781424453085
DOI	10.1109/ISCAS.2010.5537648
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-30
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reed-Solomon codes Decoding Variable speed drives Interpolation Polynomials Delay Computer architecture Throughput Equations Error correction codes
Content Type	Text
Resource Type	Article

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