Joint source channel coding strategies in Rayleigh channels for wireless systems

Analog joint source channel coding techniques for a discrete time analog system is proposed and analyzed. The proposed system has all-analog-processing joint source-channel coding with MMSE, ML. Utilization of multiple antennas helps in bridging performance margin between ML and MMSE which arises in high signal to noise (SNR) scenario. Further, spatial diversity is proposed as a viable alternative to multiple antenna systems. The application of the Amplify-and-Forward (AF) protocol with single antenna nodes results in similar performance to that of a two antenna system with Maximal Ratio Combining (MRC). A performance analysis of different decoders for a wireless system is performed. MMSE performs nearly equal to that of constrained capacity of digital techniques with scalar quantization.