针对无源光网络(PON)的传统监测方案存在的成本高、系统复杂, 以及无法实现在线监测等问题, 提出了一种改进的基于调频连续波的PON网络监测方案。采用VIP和Matlab协同仿真, 研究了该方案对业务通信性能的影响, 结果表明: 调频连续波频率变化基本对下行业务信号无影响, 调制指数越高对下行业务信号的影响越大, 如果调制指数控制在0.05以内, 则可忽略其对下行业务信号的影响。

An improved monitoring scheme in PON based on frequency-modulated continuous wave (FMCW) was proposed aiming at the problems of high cost, system complexity and unrealizable online monitoring in traditional monitoring schemes. The effects of the proposed scheme on the communication performance were investigated by using co-simulation of VPI and Matlab. The results show that the frequency change of FMCW has little effect on the downlink service signal, the lager the modulation index plays greater effect on the downlink service signal, and the effect of modulation index on the downlink service signal can be ignored if the modulation index is controlled within 0.05.