Optical mobile communication (OMC) is a recently proposed optical wireless communication concept aiming to provide very high-speed data rate optical wireless links for multiple and, in general, distributed mobile users. Previous work analyzed the rate performance of a two-user OMC system without user mobility. This paper extends the rate analysis to multiple users with mobility. The scenario of employing multiple light sources with possible user grouping is also considered. User mobility and multiple light sources lead to new challenges on the system design which are addressed for broadcast downlink communication in this work. Simulations show that user mobility decreases the rate, and the way of how to utilize multiple light sources has great impact on the performance. In particular, simultaneous power division usage of multiple light sources through user grouping and power allocation brings almost no gain as compared with the case of single light source. On the other hand, time division usage of multiple light sources is capable of compensating for the hardware deficiency and thus increasing the rate greatly. It is found that OMC is not only superior to the conventional scheme with nonadjustable channel gains but also outperforms free space optical scheme at high signal-to-noise ratio region.

中文翻译：

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具有用户移动性和多光源的光移动通信性能

光移动通信 (OMC) 是最近提出的光无线通信概念，旨在为多个分布式移动用户提供非常高速的数据速率光无线链路。以前的工作分析了没有用户移动性的双用户 OMC 系统的速率性能。本文将速率分析扩展到具有移动性的多个用户。还考虑了使用具有可能的用户分组的多个光源的场景。用户移动性和多个光源给系统设计带来了新的挑战，这些挑战在这项工作中针对广播下行链路通信进行了解决。仿真表明，用户移动性降低了速率，如何利用多个光源的方式对性能有很大影响。特别是，通过用户分组和功率分配同时功率分配使用多个光源，与单光源的情况相比几乎没有增益。另一方面，多个光源的分时使用可以弥补硬件的不足，从而大大提高速率。发现OMC不仅优于具有不可调节信道增益的传统方案，而且在高信噪比区域优于自由空间光学方案。