Effect of the Labeling the Constellation Points in a Combined Turbo-code and Modulationi

Proceedings of the 30th Conference on Information Sciences and Systems, CISS'96, pp. 67-69, Mar. 1996

Abstract: A coding scheme combining turbo-code and 8-PSK modulation is considered. It is shown that for the 8-PSK modulation with Gray mapping, the higher protected bit positions in each signal should be assigned to the systematic bit and to the first parity check bit. This assignment achieves a noticeable improvement in the performance over the other possible assignments.