How to calculate UWB radar minimum detect distance and resolution?

Hi, All,
I found a UWB chip as attachment.
Now I want to know:
1. Its minimum detect distance. I know the maximum distance can be calculated by PRF etc, but how to calculate the minimum detect distance?
2. How to calculate the resolution of the UWB radar?
3. What's the difference, which impact detect distance and resolution, between normal pulse radar and UWB radar?
Thanks.

well that is a lot of stuff to read, but it DOES say in 11.2 that the time delay measurement resolution Is 16 ps. So you have 16 pS steps in figuring out where something is. 16 pS X the speed of light tells you the resolution (I think)

Hi, biff44,
Many thanks.