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无载波幅度相位调制(Carrierless Amplitude and Phase,CAP)是超高速短距离光通信系统中的一种备选的方案,由于其成本低、频谱效率高、功耗小等优点,近年来越来越受到研究人员的关注。基于MATLAB与VPI联合仿真,探究10G/40G速率CAP系统中关键参数对系统性能的影响,包括数字滤波器滚降系数、滤波器抽头数,通过仿真找出最优系统参数值,同时对时钟偏移带来的影响也做了研究,以期为以后设计短距离CAP光通信系统有所帮助。
Carrierless Amplitude and Phase (CAP) is an alternative scheme in ultrahigh-speed short-distance optical communication system. Due to its low cost, high spectral efficiency and low power consumption, CAP has become more and more popular in recent years By researchers attention. Based on the joint simulation of MATLAB and VPI, this paper explores the influence of the key parameters on the system performance in the 10G / 40G rate CAP system, including the digital filter roll-off coefficient and the number of filter taps, and finds out the optimal system parameters through simulation. Meanwhile, The impact of migration has also been studied in the hope of helping to design a short-range CAP optical communication system in the future.