论文标题
关于具有块记忆和反馈的“光束点”通道的容量：二进制案例
On the Capacity of "Beam-Pointing" Channels with Block Memory and Feedback: The Binary Case
论文作者
论文摘要
毫米波（MMWave）通信是5G系统的关键推动因素之一，因为它提供了更大的系统带宽，并且有可能在高方向通信的较小形式中包装大量天线。为了实现潜在的高光束形成增益，需要对发射器和接收器束对齐。实际上，在众多连续的时间插槽中，内部角度（AOD）几乎保持恒定，该插槽呈现出具有记忆的状态依赖通道。另外，反向散射信号可以建模为（因果）广义反馈。具有内存的此类渠道的能力通常是信息理论中的一个开放问题。为了解决这个困难的问题，我们考虑了一个“玩具模型”，该“玩具模型”由二进制状态依赖性（BSD）通道组成，带有块内存储器（IBM）[1]和一个单位删除的反馈。该模型在峰值传输成本约束下的容量的特征是迭代闭合形式表达。我们提出了一个能力调整的方案，其中传输信号带有信息，同时借助反馈统一，随机探测梁。
Millimeter-wave (mmWave) communication is one of the key enablers for 5G systems as it provides larger system bandwidth and the possibility of packing numerous antennas in a small form factor for highly directional communication. In order to materialize the potentially very high beamforming gain, the transmitter and receiver beams need to be aligned. Practically, the Angle-of-Departure (AoD) remains almost constant over numerous consecutive time slots, which presents a state-dependent channel with memory. In addition, the backscatter signal can be modeled as a (causal) generalized feedback. The capacity of such channels with memory is generally an open problem in information theory. Towards solving this difficult problem, we consider a "toy model", consisting of a binary state-dependent (BSD) channel with in-block memory (iBM) [1] and one unit-delayed feedback. The capacity of this model under the peak transmission cost constraint is characterized by an iterative closed-form expression. We propose a capacity-achieving scheme where the transmitted signal carries information and meanwhile uniformly and randomly probes the beams with the help of feedback.
