ITERATIVE DECODING VITERBI FOR NOT PUNCTURED CODES WITH BRIEF SOURCE ALPHABET

Abstract

Earlier the diagram expected systematic convolutional component codes was applied to research of properties of turbo-codes in the iterative decoder on the basis of soft output Viterbi algorithm (SOVA). The author has developed the version of the iterative decoder with use not of systematic component codes and recursive convolutional codes with the reduced entrance alphabet are synthesized. Results of modeling of the channel with turbo-codes on the basis of the modified algorithm of Viterbi with the soft decision, with use of not systematic nonpunctured component codes with the reduced entrance alphabet and additive white Gaussian noise are given in the offered article.