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Modified Constant Modulus Algorithm based on constellation matching error with variable weight

机译:变权星座匹配误差的修正恒模算法

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In this paper, we propose a modified constant modulus algorithm based on constellation matching error with variable weight (VW-CME-MCMA) for polarization-mode dispersion (PMD) equalization in coherent optical communication system. The new algorithm added a constellation matching error (CME) term to the cost function of the traditional modified constant modulus algorithm (MCMA), considering that the CME term does not provide correct error information in the early stage of algorithmic equalization. In this case, the CME is equivalent to the noise role. Therefore, the new algorithm adaptively adjusts the weight of the CME term according to the error value of the current equalizer output signal. Through the analysis of simulation results, the new algorithm proposed in this paper can achieve faster convergence speed and lower steady-state error.
机译:本文针对相干光通信系统中的偏振模色散(PMD)均衡,提出了一种基于变权星座匹配误差(VW-CME-MCMA)的修正恒模算法。考虑到在算法均衡的早期,CME项不能提供正确的错误信息,因此新算法将星座匹配误差(CME)项添加到传统的修正恒模算法(MCMA)的成本函数中。在这种情况下,CME相当于噪声角色。因此,新算法根据电流均衡器输出信号的误差值自适应地调整CME项的权重。通过对仿真结果的分析,提出的新算法可以达到更快的收敛速度和更低的稳态误差。

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