It appears from the FFT resolution Eq (\ref{equation-fmcw-fft-resolution-continuous}) that a longer chirp duration should yield a finder range resolution but this is not true. When the product requirements such as distance and velocity resolutions as well as maximum range and velocity are given, the system parameters can be set by using those equations. Example Calculate the parameters for a $77$ GHz FMCW radar with a range resolution of $10$ cm, velocity resolution of $1$ m/s, maximum distance of $100$ m and maximum velocity of $90$ km/hr.