Error in the ammod() function

fm=100; %message freq.
fc=2000; %carrier freq.
fs=10*fc; %sample freq.
Am=8;
Ac=10;
m_index=Am/Ac;
ts=1/fs;
t=0:ts:5*(fs/fm)*ts;
xm=Am*cos(2*pi*fm*t);
xc=Ac*cos(2*pi*fc*t);

z=ammod(xm,fc,fs,0,10);
d=amdemod(z,fc,fs,0,10);
n=length(d);
z=fftshift(fft(d));
f1=(-n/2:n/2-1)*fs/n;

[Supratik Das]

anyone plzz correct the ammod() function

[Walter Roberson]

What error are you observing? I do not get any error message when I execute that code.

[Supratik Das]

plzz rectify the code anyone

[Supratik Das]

z= ammod(xm,fc,fs,0,10) this line shows error

[Supratik Das]

an error message:

'ammod' requires Communications Toolbox.

Error in

z=ammod(xm,fc,fs,0,10);

[Walter Roberson]

You need to license and install the Communications Toolbox. It is an optional toolbox that is not included in the Student Bundle.

Answer 1

[Bhukya Sandhya]

% carrier Frequency

Fc = 200;

% sampling frequency

Fs= 4000;

% time Duration

t = (0 : 1 / Fs : 1);

% sine Wave with time duration of 't'

x = sin(2*pi*t);

% Amplitude Modulation

y = ammod(x, Fc, Fs);

plot(y);

title('Amplitude Modulation');

xlabel('Time(sec)');

ylabel('Amplitude');