随着高铁的快速发展，旅客对高铁通信质量及速率有了更高的需求。因此，本课题基于项目组在ROF（Radio over Fiber）和VLC（Visible Light Communication）方面的研究基础，将两种技术交叉融合，创新应用于快速发展的高铁通信中。主要研究内容包括：（1）基于半确定性方法对无线通信信道进行建模，对高质量、大容量传输有用信息起着指导性的作用；（2）通过对ROF技术的高铁专网覆盖多径传播及移动信道的特性进行分析，利用滤波器组多载波FBMC技术有效改善高铁宽带无线通信的信号衰落；（3）建立基于多个判决机制的ROF专网联合切换触发机制，从而缩短切换时间、提高切换成功率；（4）基于ROF-VLC的多用户多载波多址接入技术，解决多用户网络需求，提高车厢内通信容量，达到高铁移动用户对大网络容量、高通信质量、高传输速率的需求目标，为高铁通信新技术发展提供重要的理论依据。

With the rapid development of high-speed railway, passengers have higher demand for communication quality and rate. Therefore, basing on our research foundation of ROF (Radio over Fiber) and VLC (Visible Light Communication)，this research topic makes the above two technologies intersect and coalesce, and applies those to the fast-developing high speed railway communication creatively. The main content of this research includes the following sections: (1) Modeling wireless communication channel based on semidefinite method, which plays a guiding role on high quality and large capacity transmission of useful information in the channel with limited spectrum resources; (2) By analyzing the characteristics of high speed rail network covering multipath propagation and mobile channel with the ROF technology, we use filter bank multicarrier FBMC technique to effectively improve high-speed broadband wireless communication signal fading; (3) Establish ROF network joint handoff trigger mechanism based on multiple judgement, so as to shorten the switching time, improve the success rate of handover; (4) We propose multi carrier multi access technology based on ROF-VLC to solve the demand of multi user network and improve the carriage’s internal communication quality. Our research meets high-speed rail mobile users’ needs of the large network capacity, high communication quality and transmission rate, and provides an important theoretical basis for the development of high-speed rail communication technology.