Multilevel coding with the 8-PSK signal set

摘要

Simulation results for concatenated outer Reed-Solomon and innerconvolutional codes used in multilevel schemes are presented. Differenthigh-rate inner convolutional codes are considered, viz., puncturedcodes and partial unit memory (PUM) codes. The best results are obtainedfor PUM codes, since they have a better extended row distance profile.The effect of channel and block interleaving at the different levels isalso studied, and iterative decoding is tried. The system transmitssignals over the AWGN channel