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How to determine and draw AM and FM phasor diagrams?

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pls post how to determine and draw am and fm phasor diagrams
 

plot phasor diagrams

in AM method since only amplitude is going to be varied ,the resultant phasor diagram is same as that of carrier before modulation
 

phasor diagram of fm

in matlab plot...suppose ur fm and ab signals are fm_signal and am_signal

%plot fm
Tx_phase_P = angle(fm_signal);
Tx_mag_P = 1;
polar(Tx_phase_P, Tx_mag_P,'bd');
title('fm plot')

%plot am
Tx_phase_P = angle(am_signal);
Tx_mag_P = abs(am_signal);
polar(Tx_phase_P, Tx_mag_P,'bd');
title('am plot')
 
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