ITERATIVE DECODING FOR PUNCTURED NO SYSTEMATIC CODES WITH BRIEF SOURCE ALPHABET AND RELATIVE SPEED 2b/3t AND 2b/3q

Abstract

Usually 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). In the articles [4, 5] 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 no punctured component codes with the reduced entrance alphabet, with relative speed 2b/3t, 2b/3q, and with additive white Gaussian noise in channel are given in the offered article.