[ s(t) = A \cdot \textrect\left(\fract\tau\right) \cos(2\pi f_0 t) ]
The transmitted signal is (s(t) = \textrect(t/\tau) \cos(2\pi f_0 t + \pi \fracB\tau t^2)). radar signal
[ |\chi(\tau, f_d)| = \left| \int_-\infty^\infty s(t) s^*(t+\tau) e^j2\pi f_d t dt \right| ] radar signal