滤波器组多载波相干光无线通信研究

相干光无线通信，能够充分利用光频段丰富的频谱资源，是超高速无线通信前沿研究领域。目前主流研究将射频无线通信中的OFDM技术沿用至相干光无线通信系统中，在超高速传输中，OFDM正交性被破坏将导致系统性能恶化。本项目针对后5G超高速无线通信需求，提出并研究基于滤波器组多载波的非正交相干光无线通信理论和方法。主要研究内容包括信道建模和容量分析、系统无线传输理论方法以及全光结构实现方案三个方面。本项目研究，将建立满足超高速相干光无线通信系统研究需求的信道模型，形成较为完整的基于滤波器组多载波的非正交相干光无线通信理论与技术体系，克服OFDM在100 Gbps以上速率的超高速光无线通信系统中的局限，为后5G无线通信系统提供理论基础和技术支撑。

Coherent optical wireless communication (OWC), which is able to fully utilize optical spectrum, is a frontier research area for ultra-high speed wireless communications. State-of-the-art research in this area adopts orthogonal frequency division multiplexing (OFDM) technology from radio frequency wireless communications. With this approach, performance will degrade rapidly with destroyed orthogonality in ultra-high speed transmission. To meet the requirement of beyond 5G wireless communication system, this project proposes and investigates filter-bank multi-carrier based non-orthogonal approaches for coherent OWC. Major research topics include: a) channel modeling and analysis of channel capacity, b) theory and schemes for the wireless transmission, and c) a full-optical implementation scheme. Work of this project will establish a channel model for ultra-high speed coherent OWC system, form a basic theory system of filter-bank multi-carrier based non-orthogonal coherent OWC, solve the problem of OFDM with over-100 Gbps ultra-high speed transmission, and provide theory and technique supports for beyond 5G wireless communication systems.