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空间光通信受到大气湍流影响的衰落时间可持续数毫秒,严重影响通信系统的可靠性。提出了一种适合于空间光通信的自适应编解码方案,并且给出了具体的实现方法。针对信道当前不同的状况,采取不同的编解码方案降低系统的误码率。并且采取阈值切换的方法,避免了由于信道状况在设计阈值周边波动时出现的编解码方案频繁切换的现象。经过MATLAB仿真,验证了该方案的可行性。
The decline time of space optical communication affected by atmospheric turbulence can last for a few milliseconds, seriously affecting the reliability of the communication system. An adaptive codec scheme suitable for space optical communication is proposed, and a concrete implementation method is given. Aiming at the different current channel conditions, different codec schemes are adopted to reduce the bit error rate of the system. And the method of threshold switching is adopted to avoid frequent switching of codec schemes due to channel conditions fluctuating around the design threshold. After MATLAB simulation, the feasibility of the program is verified.