Matrix analysis
Approximating the Gaussian multiple description rate region under symmetric distortion constraints
IEEE Transactions on Information Theory
The effect of fading correlation on average source MMSE distortion
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels
IEEE Transactions on Information Theory
Multiple description coding with many channels
IEEE Transactions on Information Theory
Source-channel diversity for parallel channels
IEEE Transactions on Information Theory
Joint Source–Channel Codes for MIMO Block-Fading Channels
IEEE Transactions on Information Theory
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Distortion exponent has been proposed as performance measure to characterize how fast the average distortion decays to zero when the SNR increases to infinity. The distortion exponent for Multiple Description Coding (MDC) has only been investigated for two descriptions and symmetric SNR. In this paper, we consider the case of any number of descriptions and asymmetric SNR. We derive an achievable distortion exponent for MDC with N ≥ 3 description and an upper bound for the distortion exponent for N = 3. Our results are based on an high-SNR approximation which we named noise cancellation method. We also consider a special case of our noise cancellation approximation method which we refer to as equal correlation. For each method, the distortion exponent is obtained as the solution of a linear program. Numerical results verify the validity of our approximation method.