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16 psk demodulation in digital communication

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idreeszaman

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i have to implement complete receiver in digital communication.The transmitter givers me an output vector which has real and imaginary values.It uses 16psk for modulation.Can anybody help how to demodulate that signal.I was assuming the output with constant amplitude but different phases but the magnitude of the whole vector is variable and also when i plot real and imaginary parts of that vector they are also variable..I do not know what is happening in the transmitter because it is an executable file.So can anybody help me in understanding what is actually happening and how to demodulate that signal.Thanks..Eagerly waiting for someones reply..
i have attached the images below

https://obrazki.elektroda.pl/5618863100_1383835590.png
https://obrazki.elektroda.pl/2962966800_1383835590.png
 

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