空间光通信视音频同步无线传输关键技术研究

Research on Key Technologies of Video and Audio Synchronous Wireless Transmission in Space Optical Communication

针对空间光通信系统在复杂环境下易出现视音频信号不同步问题,研究一种空间光通信视音频同步无线传输(Spatial Optical Communication Audio-Visual Synchronous Wireless Transmission,SOC-AVSWT)方法。该方法通过高精度时钟同步、高速光调制解调、自适应光学波前矫正等关键技术,实现视音频信号的无线同步传输。实验结果表明,在不同大气湍流强度下,SOC-AVSWT方法均表现出良好的性能,误码率最低可达1×10^(-9),时间同步误差控制在纳秒级别。

Aiming at the problem of non-synchronization of visual and audio signals in space optical communication system in complex environment,a Spatial Optical Communication Audio-Visual Synchronous Wireless Transmission(SOC-AVSWT)method is studied.This method uses high-precision clock synchronization,fast optical modulation and demodulation,and adaptive optical correction.Experimental results show that SOC-AVSWT performs well under different atmospheric conditions,with a bit error rate as low as 1×10^(-9) and synchronization errors controlled at the nanosecond level.