On Source-Channel Separation in Networks
نویسندگان
چکیده
We study the effect of source and channel coding separation in communication networks. While in general separating source and channel coding is sub-optimal, we show that in all communication networks (noisy or noiseless, wireless or wireline, with memory or memoryless, . . .), with independent Gaussian sources and arbitrary demands, there always exists a separated scheme that achieves a distortion region within a constant multiplicative factor of the best possible distortion region. This constant is independent of the communication network parameters and only depends on the number of nodes in the network, hence the separation is uniformly near optimal.
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