Performance of soft-decision trellis decoding of block codes in Rayleigh fading channel and its application to compressed image transmission

A new trellis decoding method of block codes based on generalized array codes (GAC) structure is adopted for error control in a Rayleigh fading channel. The trellis decoding method has lower complexity than the Viterbi decoding method does, and soft-decision can be easily added. We also make researches on the application of this decoding strategy to compressed image transmission system in a Rayleigh fading channel. Simulation results show that the soft-decision trellis decoding of block codes obtains significant coding gain in a Rayleigh fading channel. Furthermore, the decoding technique can make the image transmission quality greatly improved with a rather low decoding complexity