I want to use the from the backscatterPedestrian and backscatterBicyclist functions from the Phased Array System Toolbox to simulate radar targets. The radar system should operate at 77 GHz with a 1GHz bandwidth. From the Mathworks examples I found online (e.g. Matlabs FMCW and the example in the backscatterBicyclist documentation).
From my own experiece, I found that the simulation only works correctly if the sampling frequency is set larger than 2*the chirp bandwidth (or 1*chirp_bandwidth for complex signals). This of course slows the simulations down considerably.
Is there a way to speed up the computation time by using a lower sampling frequency for the signal propagation model?
I am wondering if it is possible to only sample the down-converted IF-Signal, and thus have a sampling frequency in the MHz range.