Individual Signal Separation from Mixed Signal

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Sohel Rana
Sohel Rana el 7 de Dic. de 2020
Editada: Sohel Rana el 7 de Dic. de 2020
Hi,
I have a signal 'I' which is consists of three signals. How can I separate those signals from the mixed signal 'I'. I did FFT but it did not give the satisfactory results. First three figures are the individual signal and fourth one is the mixed signal. How can I get the three individual from the mixed signals. Any help would be highly appreciated.
clc
clear all;
close all;
format long
m=1000;
I1=0.5;
I2=0.3;
I3=0.2;
L1=100*m;
L2=1000*m;
n1=1;
n2=1.444;
index=n1;
lam=m*(1.53:0.000001:1.565);
Q12=(4*pi*n1*L1)./lam;
Q23=(4*pi*n2*L2)./lam;
Q13=Q12+Q23;
figure(1)
I_first=I1+I2+2*sqrt(I1*I2).*cos(Q12);
subplot(4,1,1)
plot(lam,I_first)
I_second=I2+I3+2*sqrt(I2*I3).*cos(Q23);
subplot(4,1,2)
plot(lam,I_second)
I_third=I1+I3+2*sqrt(I1*I3).*cos(Q13);
subplot(4,1,3)
plot(lam,I_third)
I=I1+I2+I3+2*sqrt(I1*I2).*cos(Q12)+2*sqrt(I2*I3).*cos(Q23)+2*sqrt(I1*I3).*cos(Q13);
subplot(4,1,4)
plot(lam,I)

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