Distortion Exponent in Fading MIMO Channels With Time-Varying Side Information
The joint source-channel coding problem of sending a Gaussian source over a Multiple Input-Multiple Output (MIMO) fading channel with time-varying correlated side information at the decoder is studied. A block fading model for both the channel and the side information qualities is considered, and perfect (channel and side information) state information at the receiver is assumed, while the transmitter has only a statistical knowledge. In particular, the high SNR performance is studied by deriving the distortion exponent of various transmission schemes. An upper bound on the distortion exponent is derived by providing the channel state to the encoder while the side information state remains unknown.