提出一种基于现场可编程门阵列（FPGA）的光正交频分复用（OFDM）系统的实时色散均衡方法，根据色散均衡的原理，搭建了OFDM-PON系统色散均衡的仿真平台。研究结果表明，基于FPGA的色散均衡模块可以有效地补偿色散损伤，在不同的传输距离范围内光信噪比（OSNR）性能提高了0.5～1 dB，同时能够满足信号处理系统的实时性需求。
A method of real-time dispersion equalization for optical OFDM system based on FPGA is researched in this paper. According to the principle of dispersion equalization, a simulation platform for the OFDM-PON system is setup. The results show that the dispersion equalization module based on FPGA can effectively compensate for the dispersion damage, and that the performance of OSNR can be improved by about 0.5~1 dB and the requirement for real-time processing system can be met.
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