Capacity Results for Erasure Broadcast Channels with Intermittent Feedback
Capacity Results for Erasure Broadcast Channels with Intermittent Feedback
复制标题
具有间歇反馈的擦除广播通道的容量结果
DOI：
10.1109/itw44776.2019.8989343
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Shih
中科院分区：
文献类型：
--
作者：
Alireza Vahid;I;Shih
最近，我们发现，令人惊讶的是，具有全局延迟信道状态信息(CSI)的双用户擦除广播信道的容量区域可以仅利用单用户延迟CSI来获得。更准确地说，我们假设一个接收器不向另外两个节点(另一个接收器和发送器)提供其信道状态，而另一个接收器以单位延迟全局地揭示其状态。在这项工作中，我们考虑了一种更一般的情况，在这种情况下，反馈链路是间断的。准确地说，在任何时刻，每个接收器广播其CSI，并且该信息要么变得对其他两个节点可用，要么被擦除。对于这种设置，我们开发了一组新的外部边界来捕捉反馈链接的间歇性。这些外部界限取决于两个反馈链路被擦除的概率，而不是每个反馈链路的单独擦除概率。这一结果与我们早先针对单用户延迟CSI场景的发现相匹配。对于反馈链路完全相关的场景，我们还提供了一个容量实现的递归通信协议。
Recently, we showed that, rather surprisingly, the capacity region of the two-user erasure broadcast channel with global delayed channel state information (CSI) can be achieved with single-user delayed CSI only. More precisely, we assumed one receiver does not provide its channel state to the other two nodes (the other receiver and the transmitter), while the other receiver reveals its state globally with unit delay. In this work, we consider a more general setting in which feedback links are intermittent. To be precise, at any time instant, each receiver broadcasts its CSI, and this information either becomes available to the other two nodes or gets erased. For this setting, we develop a new set of outer bounds to capture the intermittent nature of the feedback links. These outer bounds depend on the probability that both feedback links are erased rather than the individual erasure probability of each feedback link. This result matches our earlier findings for the single-user delayed CSI scenario. We also provide a capacity-achieving recursive communication protocol for the scenario in which feedback links are fully correlated.
擦除带有间歇反馈的广播频道
影响因子：
8.3
作者：
Vahid, Alireza;Lin, Shih-Chun;Wang, I-Hsiang
通讯作者：
Wang, I-Hsiang