So as part of a personal project I'm in the process of simulating and making a fall detector using a 2.7GHz microwave sensor with a range of 8m. I've been using MATLAB's example code to simulate each part of the radar as well as a target and a distance returned which can be found here: https://www.mathworks.com/help/phased/ug/designing-a-basic-monostatic-pulse-radar.html#d123e23746
As well as a radar based on the BISS0001 Chip with data sheet: https://cdn-learn.adafruit.com/assets/assets/000/010/133/original/BISS0001.pdf
This seems to work quite well but one thing I'm not entirely sure on is the design specifications and how I can translate them to my radar. In MATLAB's example they have a max unambiguous range of 5000m, a resolution range of 50m and a radar cross section of 1m^2.
Given I'm not expecting more than 1 target together I figure I don't really need to worry too much about maximum range and resolution range but regardless, since the range of my radar is 8m I've put the max range as 8m and as for the range resolution I've gone for 2m.
I'm not entirely sure that those are correct but given that I'll never have more than 1 target I think it might be OK but please let me know if not. The main thing is the Radar Cross Section as it's made up of a lot of properties I'm not definite on. Looking online at published data it seems 1m^2 is standard but does this not depend on the strength of my radar instead of just the target itself?