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Two-stage adaptive PMD compensation in 40 Gb/s OTDM optical communication system using PSO algorithm

机译:使用PSO算法的40 Gb / s OTDM光通信系统中的两阶段自适应PMD补偿

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摘要

An experiment of two-stage adaptive compensation for polarization mode dispersion (PMD) in a 40 Gb/s optical time-division multiplexed (OTDM) communication system is reported. The PMD monitoring technique based on degree of polarization (DOP) was adopted. The Particle Swarm Optimization (PSO) algorithm was introduced in adaptive PMD compensation. The comparison was made to estimate the effectiveness between PSO algorithms with global neighborhood structure (GPSO) and with local neighborhood structure (LPSO). The LPSO algorithm is shown to be more effective to search global optimum for PMD compensation than GPSO algorithm. The ability of tracking changed PMD using PSO algorithm was also investigated. The two-stage PMD compensator is shown to be effective for both first-and second-order PMD, and the compensator is shown to be bit rate independent. The optimum searching time is within several hundreds of milliseconds. The response time for recovery from a sharp disturbance is about 11 ms.
机译:报道了在40 Gb / s光时分多路复用(OTDM)通信系统中对偏振模色散(PMD)进行两阶段自适应补偿的实验。采用基于偏振度(DOP)的PMD监测技术。在自适应PMD补偿中引入了粒子群优化(PSO)算法。进行比较以估计具有全局邻域结构(GPSO)和具有局部邻域结构(LPSO)的PSO算法之间的有效性。事实证明,LPSO算法比GPSO算法更有效地搜索全局最优PMD补偿。还研究了使用PSO算法跟踪更改的PMD的能力。示出了两级PMD补偿器对于一阶和二阶PMD均有效,并且示出了该补偿器与比特率无关。最佳搜索时间在几百毫秒内。从剧烈干扰中恢复的响应时间约为11 ms。

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