before adding a multiplexer to my current implementation of the 2.4 GHz FMCW radar in order to get familiar with the SAR approach I'd like to get a simulation running to assess the dependence of the result with the various experimental parameters. Is the X-axis of Fig. 4.3 in the book correct ? The range in GHz range seems surprising since f \in [1.96 ; 4.069] GHz. I would have expected the FMCW output to be in the audiofrequency range. Then, are the Matlab scripts for generating Figs. 4.3 to 4.7 of the book available ? (I assume if I can generate 4.3, the others are rather straightforward) => in eq. 4.1, why isn't the
beat frequency generated and why are we considering f_c\pm BW/2 rather
than the output of the mixer (which would cancel f_c) ?
I am mostly interested in assessing the separation capability as a function of antenna separation and obviously system bandwidth/VCO linearity.

Thanks.