A Source-Channel Separation Theorem With Application to the Source Broadcast Problem

作者：Khezeli, Kia^*; Chen, Jun^*

来源：IEEE Transactions on Information Theory, 2016, 62(4): 1764-1781.

DOI：10.1109/TIT.2016.2528279

• Bandwidth mismatch
• broadcast channel
• capacity region
• joint source-channel coding
• separation theorem
• side information

A converse method is developed for the source broadcast problem. Specifically, it is shown that the separation architecture is optimal for a variant of the source broadcast problem, and the associated source-channel separation theorem can be leveraged, via a reduction argument, to establish a necessary condition for the original problem, which unifies several existing results in the literature. Somewhat surprisingly, this method, albeit based on the source-channel separation theorem, can be used to prove the optimality of non-separation-based schemes and determine the performance limits in certain scenarios where the separation architecture is suboptimal.

• 出版日期2016-4