There is my Basic Am modulator design with Labview in youtube link.
I modulate signal which is simulated, but I want to modulate my voice or any mp3 or mp4 or wav file in Labview . How can I do this ? Is there any way ?
http://www.youtube.com/watch?v=gCH9cKJvwqE
LabVIEW can read sound directly from your sound card to your PC and open an audio file. Examples of LabVIEW you will find both subjects. You can use these examples as a subVI in your project. Sorry to not be more specific, but now I do not have LabVIEW installed on my PC.
You can also try to implement an AM modulator using single mathematical operations. The goal is about to build the AM signal, given by:
XAM(t) = A(1+mx(t))Cos wct
Where m is the modulation index, wc is the carrier frequency, x(t) is the message and A is the carrier amplitude.
Now, this scheme works well with lowpass signals (like voice) but i'm not really sure whether this works with an audio file (mp3), so you probably need to check its frequency content.
Best regards!
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