Analog Coding for Delay-Limited Applications

In this paper, we consider the problem of sending an analog source over an additive white Gaussian noise channel. The traditional analog coding schemes suffer from the threshold effect We introduce two robust schemes for analog conding. Unlike the previous methods, the new methods asymptotically achieve the optimal scaling of the signal-to-distortion-ratio (SDR) without being affected by the threshold effect. Also, we show that approximated versions of these techniques perform well for the practical applications, with a low complexity in encoding/decoding.