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Thread Subject:
automatic modulation recognition

Subject: automatic modulation recognition

From: jessica david

Date: 4 Mar, 2011 01:26:20

Message: 1 of 2

I need to implement an algorithm for automatic modulation recognition using matlab. I am planning to do this by using pattern recognition, I have read about the decision tree approach, it says to "ideniify the constant envelope signals (CW, FM, FSK). PSK sigals are
not considered as constant envelope signals, since in practice
they are band-limited, which leads to a non-constant
envelope. The feature used to identify the envelope variations
is the maximum of the squared Fourier transform of the
normalized signal amplitudes "
How can i implement this technique in matlab, i need help with the code. I also need to calculate the instantaneous freq/phase, etc. I am using a .wav file.

Subject: automatic modulation recognition

From: Ronit Solanky

Date: 9 Apr, 2014 03:36:08

Message: 2 of 2

"jessica david" wrote in message <ikpf3s$m55$1@fred.mathworks.com>...
> I need to implement an algorithm for automatic modulation recognition using matlab. I am planning to do this by using pattern recognition, I have read about the decision tree approach, it says to "ideniify the constant envelope signals (CW, FM, FSK). PSK sigals are
> not considered as constant envelope signals, since in practice
> they are band-limited, which leads to a non-constant
> envelope. The feature used to identify the envelope variations
> is the maximum of the squared Fourier transform of the
> normalized signal amplitudes "
> How can i implement this technique in matlab, i need help with the code. I also need to calculate the instantaneous freq/phase, etc. I am using a .wav file.


Hey, jessica

Currently I am also working on the same topic and I am also trying to detect the instantaneous phase for the key feature. So please If you have already implemented it in MATLAB then please it is my humble request please help me for this and if you have MATLAB code for this then please send me. It is my collage project....

Thank you...

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