FIR 底通和带通滤波器和IIR 底通和带通滤波器，搭建OFDM通信系统的框架，多机电力系统仿真及其潮流计算。- Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Build a fr a mework OFDM communication system, Multi-machine power system simulation and flow calculation.