Experiment 4Aim: To generate FM signalSoftware Used: MatlabSource Code:clcclear allclose allf1=200;f2=500;fc=2000;fs=5*fc;t=0:1/(5*fs):1/f1;x=cos(2*pi*f1*t)+cos(2*pi*f2*t);subplot(3,1,1);plot(t,x);title('Message Signal');xlabel('Time');ylabel('Amplitude');grid on;xfm=modulate(x,fc,fs,'fm');subplot(3,1,2);plot(t,xfm);title('Frequency Moddulated Signal');xlabel('Time');ylabel('Amplitude');grid on;fm=fft(xfm,1024);subplot(3,1,3);plot(abs(fm));title('FM Frequency Spectrum');xlabel('Frequency');ylabel('Amplitude');grid on;