Coded Modulation for Dpsk on Fading Channels

| Coded modulation for di erentially encoded PSK with non{coherent reception on at fading channels is considered. We derive theoretical limits on the performance and show how to design multilevel coding schemes and bit{interleaved coded modulation. Since Gray labeling is not possible for multiple symbol di erential detection and PSK constellations, bit{interleaved coded modulation exhibits severe degradation compared to the multilevel coding approach. By means of simulations, where turbo codes are used as component codes, the theoretical considerations are con rmed and we show how close theoretical limits of di erentially encoded PSK transmission over at fading channels can be approached by applying properly designed coded modulation schemes.