Analog joint source-channel coding for transmission of correlated senders over separated noisy channels

We consider the problem of transmitting quadratic Gaussian sources over separated Gaussian channels using analog joint source-channel coding schemes. We propose a novel distributed joint source-channel coding scheme based on zero-delay analog mappings, which exploits the correlation between sources in an efficient way. Different from digital systems, the proposed system offers low delay, low complexity and high robustness. Simulation results show that the proposed scheme performs very close to the theoretical limits, is very robust against signal to noise ratio mismatching, and outperforms existing zero-delay analog mappings, especially for high channel signal to noise ratios and highly correlated sources.