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Reliability of error correcting codes on wireless information networks

International Journal of Reliability, Quality and Safety Engineering 1996年第4期3卷 283-304页

作者： Shooman, Martin L. Polytechnic University Long Island Campus Farmingdale NY 11735 United States

error correcting codes are well known techniques for improving bit error rate (BER) performance in digital communication systems and are particularly important in wireless information networks to help establish reliable communication links. This paper examines the effect of coder/decoder circuitry failures on the overall communication system performance. A system analysis of the error correction coding scheme performance must include an evaluation of the reliability of the coder/decoder circuitry because their failures also serve as a source of undetected errors. The parity bit code, Hamming single error correcting and detecting code, and the Reed-Solomon code are included in the study. Results reveal that for applications as described in the text that require low bit error rate and operate at low data rates, the reliability of the coding circuitry can play a significant role in determining overall system performance. In fact, for such error and data rates, a simpler coding scheme with higher circuit reliability may actually be more beneficial than a more complex coding scheme with enhanced error correcting ability but with a higher chip failure rate. © World Scientific Publishing Company.

关键词： Circuits error-correcting-codes IC-Failure rates Reliability Wireless

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Adaptive combined chase-GMD algorithms for block codes

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IEEE COMMUNICATIONS LETTERS 2004年第4期8卷 235-237页

作者： Mahran, A Benaissa, M Univ Sheffield Dept Elect & Elect Engn Sheffield S1 3JD S Yorkshire England

This work proposes a new adaptive approach to the soft decision decoding of the so-called combined Chase-GMD class of algorithms (CGA). A reliability threshold is used to match the decoding performance to the channel conditions. As a result, a significant reduction in decoding complexity can be achieved by reducing the number of required algebraic decodings. The proposed adaptive application can achieve the upper performance limit of the CGA with significant complexity reduction.

关键词： adaptive decoding channel coding error-correcting-codes reliability based decoding soft-decision decoding

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On reducing complexity of a soft-decision decoding algorithm for cyclic codes based on energy minimization principle

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1998年第10期E81A卷 1998-2004页

作者： Shiozaki, A Aoki, K Univ Osaka Prefecture Coll Engn Sakai Osaka 5998531 Japan Osaka Electrocommun Univ Grad Sch Engn Neyagawa Osaka 5728530 Japan

We propose a novel soft-decision decoding algorithm for cyclic codes based on energy minimization principle. The well-known soft-decision decoding algorithms for block codes perform algebraic (hard-decision) decoding several times in order to generate candidate codewords using the reliability of received symbols. In contrast, the proposed method defines energy as the Euclidean distance between the received signal and a codeword and alters the values of information symbols so as to decrease the energy in order to seek the codeword of minimum energy, which is the most likely codeword. We let initial positions be the information parts of signals obtained by cyclically shifting a received signal and look for the point, which represents a codeword, of minimum energy by moving each point from several initial positions. This paper presents and investigates reducing complexity of the soft-decision decoding algorithm. We rank initial positions in order of reliability and reduce the number of initial positions in decoding. Computer simulation results show that this method reduces decoding complexity.

关键词： error-correcting-codes error-control decoding algorithm soft-decision decoding energy minimization principle

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