loop-gain method

The method sets system disturbance within the feedback gain matrix f, which can be computed by iteration, in order to make the closed loop system optimum.

该方法设定外部干扰矩阵，基于全状态的分散，将系统干扰项考虑到反馈增益矩阵f中，用迭代方法求F阵以使闭环系统最优。

The method of erbium-doped fiber amplifier(EDFA) gain flattening using a fiber loop mirror(FLM) acting as a wavelength filter was analyzed in theory.

从理论上分析了利用光纤环形镜（FLM）中的偏振耦合效应作为滤波器，对掺铒光纤放大器（EDFA）实现增益平坦化的方法。

Traditional loop gain simulation method is based on two-port network models, which is complex to analysis and it is not suitable to get quantitative analysis of the loop gain fast.

传统的反馈环路增益仿真方法基于有源双端口网络，分析复杂，不利于快速得到环路的定量分析。