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clear all;
clc;
Adc=3;      %Ö±Á÷·ÖÁ¿
A1=2.8;     %ƵÂÊ1µÄ·ù¶È
A2=1.6;     %ƵÂÊ2µÄ·ù¶È
F1=50;      %ƵÂÊ1µÄƵÂÊ
F2=75;      %ƵÂÊ2µÄƵÂÊ
P1=-30;     %ƵÂÊ1µÄÏàλ
P2=90;      %ƵÂÊ2µÄÏàλ
Fs=1024;    %²ÉÑùƵÂÊ
N=1024;     %²ÉÑùµãÊý
t=0:1/Fs:N/Fs;
y=Adc+A1*cos(2*pi*F1*t+pi*P1/180)+A2*cos(2*pi*F2*t+pi*P2/180);
Y=fft(y,N);
Ayy=abs(Y);       %ÇóÄ£
Ayy=Ayy/(N/2);    %Çó·ù¶È
Ayy(1)=Ayy(1)/2;
F=([1:N]-1)*Fs/N; %ת»¯ÎªÆµÂÊ
plot(F(1:N/2),Ayy(1:N/2)); %´òӡƵÂÊ¡¢·ù¶ÈͼÆ×

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