Extract IQ data

[Amir2]

Hi all,

I am trying to extract the IQ data in the receiver and record it in a vector. 

Let's assume that I use  "niUSRP EX PSK Rx.vi" which is in Modulation Toolkit Examples folder.

This vi shows the received signal's constellation and transitions on the front panel. 

Assuming QPSK modulation scheme, does anybody let me know how we can extract IQ data in the complex-value format (I+Qj)? Any idea how can I modify the part which is identified by the red circle in the pic? 

I would like to save the first 10000 complex-value of the received symbols in a vector.

Thank you.

[AirFrantz · Accepted solution]

Hello,

Actually if you look two VIs up the chain at the 'MT Demodulate PSK.vi', you'll see that the output is the recovered complex waveform.  This contains the complex waveform information that you're looking for.

Take a look at the attached picture.

[Amir2]

I see! Thank you.