complete IQ modulator from Baseband through RF upconversion

I am trying to build a simulink model of a complete IQ RF modulator. I have a random number generator which feds the IQ modulator which feds the raised cosine filter. From there I am trying to get the IQ data into the IQ modulator that comes with the RF Blockset. I am stuck at this point. I tried to fed the IQ data through a Real/Imag splitter then into the Inport element but simulaink doe not like that. Here is the block diagram of what I am trying. How do I get the IQ data into the RF Blockset modulator?

Answer 1

[Abhijeet]

Hi Mark ,

I understand that you want to build a simulink model of a complete IQ RF modulator and you are facing issue while feeding signal from 'real/imag' splitter to 'inport block.

When feeding signals from a 'Real/Imag' splitter to an 'Inport' block, it is necessary to provide complex-valued input signals. To achieve this, the 'Real-Imag to Complex' block can be utilized to combine the separate real and imaginary parts into a complex signal before connecting to the 'Inport' block. This step ensures the signal is in the correct format for further processing within the RF Blockset.

I suggest the following link to know more about 'Real-Imag to Complex' block :-

• https://www.mathworks.com/help/simulink/slref/realimagtocomplex.html

I hope this resolves the issue you were facing.