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光纤通信中激光接口干扰信号过滤研究

Study on filtering interference signal of laser interface in optical fiber communication
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摘要 光纤通信中激光接口的传输信号受到色噪声线谱扰动的干扰,导致输出误码失真,需要进行干扰信号滤波处理,提出一种基于自适应格型IIR陷波处理的光纤通信中激光接口干扰信号过滤技术。提取光纤通信中的激光接口输出信号特征量,采用自适应滤波方法进行光纤通信信号的线谱增强处理,结合自相关匹配方法提取光纤通信的激光接口传输信号的集平均统计量,采用相位耦合方法进行信号的频谱分解,对提取的干扰信号特征量采用自适应格型IIR陷波方法进行特征分解和盲源分离,实现光纤通信中激光接口干扰信号的有效过滤。仿真结果表明,采用该方法进行光纤通信中激光接口干扰信号过滤的滤波性能较好,输出信号的信噪比较高,提高了激光通信传输的信号保真性。 In optical communication , the transmission signal of the laser interface is disturbed by the line spectrum disturbance of the color noise, which leads to the distortion of the output error code. It is necessary to carry out the filtering processing of the interference signal. A filtering technique for the interference signal of the laser interface based on the adaptive lattice IIR notch processing is proposed. The characteristic quantity of the output signal of the laser interface in the optical fiber communication is extracted. The adaptive filtering method is used to enhance the line spectrum of the optical fiber communication signal, and the average statistic of the laser interface transmission signal is extracted by the autocorrelation matching method. The phase coupling method is used to decompose the signal spectrum, and the extraction of the signal is extracted. The eigenvalue of the interference signal is used in the adaptive lattice IIR trapping method for feature decomposition and blind source separation , which can effectively filter the interference signal of the laser interface in the optical fiber communication. The simulation results show that the filtering performance of the interference signal of the laser interface in optical fiber communication is better, the signal to noise ratio of the output signal is high , and the signal fidelity of the laser communication transmission is improved.
作者 李媛 LI Yuan(Sichuan Post & Telecommunication College, Chengdu 610067 , China)
出处 《激光杂志》 北大核心 2019年第4期122-126,共5页 Laser Journal
关键词 光纤通信 激光接口干扰信号 过滤 陷波器 optical fiber communication laser interface interference signal filter trap filter
作者简介 李媛(1973-),女(汉族),四川成都人,硕士,副教授,主要研究方向:通信工程。E-mail:18081911299@189.cn。
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