Algebraic Soft-Decision Techniques for Linear Block Codes<br />DOI: 10.14209/jcis.1990.4

Authors

  • Valdemar C. da Rocha Jr.
  • Patrick G. Farrell

Abstract

This paper presents a way of incorporating soft-decision information as an integral part of the process of decoding linear block codes which have an algebraic structure. The quantised demodulator output levels of a soft-decision communication system are represented by the elements of a Galois field. As a consequence it is then possible to define a soft syndrome, a soft standard array and a soft trellis for decoding linear block codes. This approach stands in opposition to deconding methods which combine hard-decisions with the digit reliability measures in an ad-hoc fashion. A soft version of an error-trapping decoder for cyclic codes is given as an application of the theory developed. The basic BCH (Bose-Chaudhuri-Hocquenghem) algebraic algorithm needs to be modified in order to benefit from the procedures here described.

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Published

2015-06-16

How to Cite

C. da Rocha Jr., V., & G. Farrell, P. (2015). Algebraic Soft-Decision Techniques for Linear Block Codes<br />DOI: 10.14209/jcis.1990.4. Journal of Communication and Information Systems, 5(1). Retrieved from https://jcis.sbrt.org.br/jcis/article/view/158

Issue

Vol. 5 No. 1 (1990)

Section

Regular Papers

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Received 2015-06-16
Accepted 2015-06-16
Published 2015-06-16