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围绕正交频分复用-无源光网络(OFDM-PON)系统中非线性损伤的补偿问题开展研究。使用VOLTERRA模型对非线性补偿器进行辨识,利用差异因子并结合QR分解,推导出修正向量的解析表达式,提出模型核向量的自适应修正方法,形成正交频分复用-无源光网络系统中非线性损伤的补偿算法。仿真结果表明,所提出的方法可使系统误比特率提升1%~3%,在系统比特率为130Gb/s时,系统误比特率可保持在1%左右。
The problem of compensation for nonlinear damage in Orthogonal Frequency Division Multiplexing - Passive Optical Network (OFDM-PON) system is studied. The VOLTERRA model is used to identify the nonlinear compensator. The difference factor and the QR decomposition are used to derive the analytical expression of the correction vector. The adaptive correction method of the kernel vector is proposed to form the Orthogonal Frequency Division Multiplexing - Passive Optical Network Compensation Algorithm of Nonlinear Damage in System. The simulation results show that the proposed method can increase the system bit error rate by 1% ~ 3%. When the system bit rate is 130Gb / s, the system bit error rate can be kept at about 1%.