Zero-delay joint source-channel coding in the presence of interference known at the encoder

Zero-delay transmission of a Gaussian source is considered over an additive white Gaussian noise (AWGN) channel in the presence of an additive Gaussian interference signal. The mean squared error (MSE) distortion is minimized under an average power constraint assuming that the interference signal is known causally at the transmitter. Optimality of simple uncoded transmission does not hold in this setting due to the presence of the known interference signal, and various non-linear transmission schemes are proposed. In particular, interference concentration (ICO) and one-dimensional lattice (1DL) strategies are studied. It is shown that non-uniform quantization of the interference signal for ICO improves the performance.