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复用技术能够利用现有的硬件设备和成熟技术,成倍地提高系统容量,已经成为高速空间光通信的重要技术手段。文章从提高信息传输速率的角度出发,研究了偏振复用、波分复用、时分复用、光MIMO以及正交频分复用五种复用技术在空间光通信应用的基本原理,并介绍了最新研究动态。对比分析了空间光通信中五种复用技术的优缺点,结果表明正交频分复用和光MIMO技术是实现空间光通信海量信息传输的有效途径之一,具有很大的发展潜力。
Multiplexing technology can make use of the existing hardware equipment and mature technologies to exponentially increase system capacity and has become an important technical means of optical communication in high speed space. From the perspective of improving the information transmission rate, this paper studies the basic principles of the application of five multiplexing technologies: polarization multiplexing, wavelength division multiplexing, time division multiplexing, optical MIMO and orthogonal frequency division multiplexing The latest research developments. The advantages and disadvantages of five multiplexing technologies in space optical communication are compared and analyzed. The results show that Orthogonal Frequency Division Multiplexing and Optical MIMO are one of the effective ways to realize the mass information transmission in space optical communication, and have great potential for development.