with a prototype of FMCW radar I'm trying to resolve the distance to the target
The Audio card characteristics are as follows: Fs= 44100Hz
So the FMCW radar range resolution is RR=440MHz/c = 0.34m Ts=20ms thus, number of points N=Fs*Ts = 882
I've tried putting the target on various distances 1m, 1.1m, 1.2m, 1.3m all the way to 2m
Does the range resolution limit me from calculating distance changes of 0.1m? I'm new to this and would appreciate your help.
My code takes the IF difference, Does FFT of the signal with 4*N points (I don't know why but this just worked whilst testing) I get the correct distances but my question is How?! Do targets not have to be spaces 34cm apart ?
When I produce the plot (X axis is 0 to max_range which is around 150m with the given data, and Y axis is the FFT values with 4*N samples.
Could someone point me in the right direction?