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.