I appreciate any help: I wanna convert IQ data to its RF data, representing an image. The centre frequency and sampling rate are available. What I do is:
First I do up-sampling in MATLAB by applying interpolation along the depth. So, the new data has a new sampling frequency higher than the first one.
My questions are:
Do I need to do low-pass filtering before multiplying the data by the exponential term (that converts IQ to RF)?
What is the exponential form that I need to multiply the IQ data by ( specifically, I am asking about the frequency or frequency ratio in the exponential term used to do the conversion, which I mentioned in the first question) Thanks
Could someone guide me through the detail one more time? I read the documentation I copy here and it is confusing for me: (Page 8 and afterwards)