This two-part paper focuses on the system design and performance analysis for a point-to-point resonant beam communication (RBCom) system under both the quasi-static and mobile scenarios. Part I of this paper proposes a synchronization-based information transmission scheme and derives the capacity upper and lower bounds for the quasi-static channel case. In Part II, we address the mobile scenario, where the receiver is in relative motion to the transmitter, and derive a mobile RBCom channel model that jointly considers the Doppler effect, channel variation, and echo interference. With the obtained channel model, we prove that the channel gain of the mobile RBCom decreases as the number of transmitted frames increases, and thus show that the considered mobile RBCom terminates after the transmitter sends a certain number of frames without frequency compensation. By deriving an upper bound on the number of successfully transmitted frames, we formulate the throughput maximization problem for the considered mobile RBCom system, and solve it via a sequential parametric convex approximation (SPCA) method. Finally, simulation results validate the analysis of our proposed method in some typical scenarios.

翻译：本文分为上下两部分，重点研究准静态和移动场景下点对点共振光束通信（RBCom）系统的设计与性能分析。第一部分提出了一种基于同步的信息传输方案，并推导了准静态信道情况下的容量上下界。第二部分针对接收端与发射端存在相对运动的移动场景，建立了联合考虑多普勒效应、信道变化和回波干扰的移动RBCom信道模型。基于该信道模型，我们证明了移动RBCom的信道增益会随传输帧数增加而降低，由此表明在未进行频率补偿的情况下，当发射端发送特定数量的帧后，所研究的移动RBCom会终止工作。通过推导成功传输帧数的上界，我们构建了该移动RBCom系统的吞吐量最大化问题，并采用序列参数凸近似（SPCA）方法进行求解。最后，仿真结果验证了所提方法在典型场景中的分析结论。