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%**************************************?Filter?**************************************%
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%???Date:2018.8.25
%???Author:flypassion
%???Version:1.0
clear?all
close?all
clc
%%?Parameter?Interface
Frequence0??????????=?60;????????%單位：Hz????
Frequence1??????????=?130;???????%單位：Hz
Frequence2??????????=?1e3;???????%單位：Hz
SampleFre???????????=?4e3;???????%單位：Hz
SampleLen???????????=?SampleFre;?%采樣點數
%%?Main
%-------------------產生三路信號
t?=?0:1/SampleLen:1/SampleFre*（SampleLen-1）;
SignalData0?=?sin（2*pi*Frequence0*t）;
SignalData1?=?sin（2*pi*Frequence1*t）;
SignalData2?=?sin（2*pi*Frequence2*t）;
SignalData3?=?SignalData0+SignalData1+SignalData2;
figure;hold?on
plot（t（1:150）SignalData0（1:150）‘b‘）
plot（t（1:150）SignalData1（1:150）‘r‘）
plot（t（1:150）SignalData2（1:150）‘k‘）
hold?off
figure;plot（t（1:150）SignalData3（1:150））
title（‘三路信號求和‘）
%-------------------頻譜分析
FFT_Data?=?fft（SignalData3）;
Ampl