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Reliability level list based direct target codeword identification algorithm for binary BCH codes

Publication Type : Journal Article

Publisher : WSEAS Transactions on Communications

Source : WSEAS Transactions on Communications, Volume 12, Number 6, p.287-299 (2013)

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Keywords : Algorithms, BCH code, Decoding, Identification algorithms, Iterative algorithm, Iterative methods, Probability of errors, Reliability, Reliability information, Reliability-based, Simulation studies, Soft decision decoding

Campus : Coimbatore

School : School of Engineering

Department : Electronics and Communication

Verified : Yes

Year : 2013

Abstract : In BCH coded schemes the reliability information available with the demodulated bits can be effectively used for soft decision decoding (SDD) to improve signal to noise ratio performance. Chase algorithms, their adaptations, and modifications available for SDD trade complexity for performance to different levels. A new iterative algorithm - Reliability Level List based Direct Target Codeword Identification Algorithm (DTCI) - is proposed in the paper; the algorithm yields the best that is possible with SDD. The concept of reliability level list (RLL) introduced in the paper is central to the application of the algorithm. At every stage of the iterative process followed, the algorithm uses the reliability information of the bits and identifies the next most likely candidate word to be examined. This ensures that the correct decoded codeword is identified through the shortest number of steps. Detailed simulation studies with different BCH codes amply bring out the effectiveness and superiority of the algorithm.

Cite this Research Publication : Dr. Yamuna B. and Padmanabhan, T. R., “Reliability level list based direct target codeword identification algorithm for binary BCH codes”, WSEAS Transactions on Communications, vol. 12, pp. 287-299, 2013.

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