Feedback and Partial Message Side-Information on the Semideterministic Broadcast Channel
Feedback and Partial Message Side-Information on the Semideterministic Broadcast Channel
复制标题
半确定性广播信道上的反馈和部分消息侧信息
DOI：
10.1109/tit.2017.2709758
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发表时间：
2015
影响因子：
2.5
通讯作者：
Michèle A. Wigger
中科院分区：
文献类型：
--
作者：
A. Bracher;Michèle A. Wigger
建立了接收端具有部分消息边信息（P-MSI）的半确定性离散无记忆广播信道（SD-BC）的容量。在设置没有一个共同的消息，它表明，P-MSI的随机接收器单独可以增加容量，而P-MSI的确定性接收器只能增加容量，如果随机接收器也有P-MSI。后者仅适用于没有公共消息的设置：如果编码器也传达公共消息，则仅向确定性接收器的P-MSI可以增加容量。这些容量结果被用来表明，来自随机接收机的反馈可以增加没有P-MSI的SD-BC的容量以及在确定性接收机处具有P-MSI的SD-BC的总速率容量。P-MSI和反馈之间的联系是反馈码，粗略地说，它在随机接收机处将反馈转变为P-MSI，从而帮助随机接收机减轻所经历的干扰。对于的情况下，随机接收机具有完整的MSI（F-MSI），因此可以完全减轻所经历的干扰，也在没有反馈，它表明，反馈不能增加容量。
The capacity of the semideterministic discrete memoryless broadcast channel (SD-BC) with partial message side-information (P-MSI) at the receivers is established. In the setting without a common message, it is shown that P-MSI to the stochastic receiver alone can increase capacity, whereas P-MSI to the deterministic receiver can only increase capacity if also the stochastic receiver has P-MSI. The latter holds only for the setting without a common message: if the encoder also conveys a common message, then P-MSI to the deterministic receiver alone can increase capacity. These capacity results are used to show that feedback from the stochastic receiver can increase the capacity of the SD-BC without P-MSI and the sum-rate capacity of the SD-BC with P-MSI at the deterministic receiver. The link between P-MSI and feedback is a feedback code, which—roughly speaking—turns feedback into P-MSI at the stochastic receiver, and hence helps the stochastic receiver mitigate experienced interference. For the case, where the stochastic receiver has full MSI (F-MSI) and can thus fully mitigate experienced interference also in the absence of feedback, it is shown that feedback cannot increase capacity.