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Real signal DPSK demodulation

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Federico Massimi
Federico Massimi on 25 Jun 2021
Answered: Arthi Sathyamurthi on 19 Jul 2021
Hi, I sampled a real QPSK signal of a real communication, I recorded the samples with an ADC after the Downconverter.
Now I would like to make a demodulator in matlab, both Simulink and MATLAB code are fine, my goal is just to extract the bits from the signal.
I've been trying for days both with ready-made Simulink blocks and also trying to make custom blocks, but I don't get anything. Can anyone help me or have some examples of DPSK demodulator that can be used with a real world signal (ADC samples).
Thanks in advance.

Answers (1)

Arthi Sathyamurthi
Arthi Sathyamurthi on 19 Jul 2021
Hello Federico,Considering you sampled a real DPSK signal (assuming the QPSK is a typo, as QPSK sampled signals require QPSK demodulator), use the comm.DPSKDemodulator method to demodulate. Make sure to give the correct ModulationOrder and specify the BitOutput as bits. If necessary, specify the PhaseRotation property also.

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