How can I perform QPSK modulation of an .mp3 / .wav file ?

Hello everyone,

I am kind of a novice in MATLAB. I have been trying to perform QPSK modulation of an .mp3 / .wav file and then pass it through an AWGN channel. Can anyone please tell me how to go about this process? Thanks in advance.

Answer 1

[rifat]

sounds like an assignment problem. anyway... 1. read file using wavread() 2. use modulate() to apply QPSK modulation 3. use awgn() to add noise with a desired SNR 4. use demod() to obtain the received signal.

[IKRAM ILYAS]

thanks... will try it out... :)

[IKRAM ILYAS]

a slight problem... the 'modulate' function does not work for QPSK... It works for QAM and PPM and other methods... but not QPSK... Can you suggest some other alternative please.. Thanks...

[rifat]

then download this file (<http://www.mathworks.com/matlabcentral/fileexchange/33443-qpsk-modulation-in-awgn/content/QPSK.m>)

[IKRAM ILYAS]

Thanks...