Trellis coded Q/sup 2/PSK signals. 2. Land mobile satellite fading channels

摘要

Utilisation of Q/sup 2/PSK signals is analysed on the land mobile satellite channel. Trellis codes design criteria for coherent, differentially coherent and noncoherent detection procedures are derived. The implementation model of the transmitter-channel-receiver structure, where block interleaving/deinterleaving is utilised, is presented. New Q/sup 2/PSK MTCM systems are designed following construction criteria for optimum performance on fading channels. Also, four different four-dimensional Q/sup 2/PSK MTCM with different number of states and diversity factors are designed. Double 8-PSK MTCM are also combined with decoupled Q/sup 2/PSK signals to construct bandwidth efficient TCs for optimum performance an the fading channel. Finally, the new Q/sup 2/PSK MTCM and some of the Q/sup 2/PSK TCs codes presented in Part 1 are evaluated on fading channels, where various levels of shadowing have been tested, from the Rayleigh channel to the AWGN channel.