给出接收信号眼图及系统仿真误码率，基于kaiser窗的双谱线插值FFT谐波分析，数据模型归一化，模态振动。- The received signal is given eye and BER simulation systems, Dual-line interpolation FFT harmonic analysis kaiser windows, Normalized data model, modal vibration.

仿真不同频率的组合信号通过滤波器后作FFT，得到滤波后信号的fft频谱及fft求模，并找出最大值及索引，非常实用。。(The combination of different frequency signal through the filter FFT was obtained after filtering FFT spectrum and FFT signal for mold, and find out the maximum value and index, very practica