仿真分析相干光通信中的数字信号处理算法

Simulated analysis of digital signal processing algorithms in coherent optical communication

为了提高相干光通信系统的性能,降低系统复杂度,便于实现实时高速相干光通信系统,将数字信号处理算法应用到相干光通信中。对受到噪声影响的信号进行仿真,通过Matlab软件处理离线信号,利用部分算法对其进行试验验证。根据仿真平台及算法接收没有色散补偿的光纤信号,提出加权前馈相位恢复算法,其能够使灵敏度得到提高。最后,对系统性能进行分析,分析结果表明所创建的仿真平台和数字信号处理算法能够充分展现真实的实验情况,为今后数字相干光通信的实现提供研究基础及指导。

In order to improve the performance of the coherent optical communication system,reduce the complexity of the system,and facilitate the realization of real-time high-speed coherent optical communication system,a digital signal processing algorithm is used in coherent optical communication. Firstly,the signal affected by noise is simulated,and then the off-line signal is processed by Matlab software ,and tested and verified with some algorithms. According to the simulation platform and the algorithm,the fiber without dispersion compensation is received,and a weighted feedforward phase recovery algorithm is proposed,which can improve the sensitivity. The performance of the system is analyzed and expressed. The simulation platform and digital signal processing algorithm can fully show the actual experimental situation,and provide research basis and guidance for the future high-speed implementation of digital coherent optical communication.