Distance2Go Evaluate recorded data from RadarGUI

Hello,

I'm trying to evaluate data I recorded with the RadarGUI to get the same results as the RadarGUI shows me. I'm working with a Distance2Go Demo Board.
The D2G board detects two targets and displays both in the RadarGUI, so far so good. Then I used the record function to record the IQ data, the FFT data and the target info data.

Now I'm trying to evaluate the recorded FFT data to get the same target info (range and level) as the RadarGUI shows me. However, I cannot get it to work (I'm using MATLAB).
The recored FFT data (can be easily pasted into MATLAB) is attached to this post. The FFT bin size is the sampling frequency divided by the FFT size which is 166666 Hz/1024=162.76 Hz. To get the desired info I should have peaks with a beatfrequency as follows:
1304.6 Hz, 2609.3 Hz. Therefore the results I should get are: target 1) level: 1341, range 260 cm and target 2) level: 882, range 139 cm. So the 1304 Hz are connected to target #2, and the 2609 Hz to target #1.

I am trying to find the FFT peaks with the following MATLAB function:
, where 10 is the range threshold and fftdata is a vector that contains the data from the attached file.
The values in lvl correspond to the levels mentioned above. But there is a problem with the beatfrequency. I calculate it by . By doing so, I don't end up with the frequencies mentioned above. What am I doing wrong?

Another problem is that I get 11 instead of 2 results by doing that...

I appreciate your help!

?????

• fftdata.txt‎ (9.7 KB)