AM modulated and demodulated signal

Question

Mahabba Almheiri 2020-12-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/688139-am-modulated-and-demodulated-signal

回答： Shraddha Jain 2020-12-15

在 MATLAB Online 中打开

I run this code but I have mistake in this part :

y_demod =amdemod(y_received,Fc,Fs,0);

can anyone help me with the correct syntax.

[y,Fs]=audioread("SpeechDFT-16-8-mono-5secs.wav") %Input audio
m=0.95 % Modulation Index
snr= 60;
Fc = 150e6; % Carrier Frequency
Fs= 300e6; %sampling frequency
AM = ammod(y,Fc,Fs,0,max(y)/m);
y_received = awgn(AM,60); 
y_demod =amdemod(y_received,Fc,Fs,0);
figure
plot(y_received)
title('AM signal over AWGN');
xlabel('Time(sec)');
ylabel('Amplitude');
(y -y_demod )  % Errors
(y - y_demod).^2   % Squared Error
mean((y - y_demod).^2)   % Mean Squared Error
RMSE = sqrt(mean((y - y_demod).^2));  % Root Mean Squared Error