Blackman窗分析频谱，周期信号的截断，不同采样方式周期信号的频谱，信号序列的过零点查找与二次采样-Blackman window analysis of the spectrum, periodic signal truncation, different sampling methods periodic signal spectrum, the signal sequence of zero-crossing point search and the second sampling

自己制作的信号生成与信息处理模块，对生成的信号进行滤波，采样FFT然后分析功率谱,输出高通信号-Signal generation and produce their own information processing module, a signal generated by filtering, sampling FFT and then analyzes the power spectrum of the output high communication No.