A system and method for highly selective intrusion detection using a
sparse array of time modulated ultra wideband (TM-UWB) radars. Two or
more TM-UWB radars are arranged in a sparse array around the perimeter of
a building. Each TM-UWB radar transmits ultra wideband pulses that
illuminate the building and the surrounding area. Signal return data is
processed to determine, among other things, whether an alarm condition
has been triggered. High resolution radar images are formed that give an
accurate picture of the inside of the building and the surrounding area.
This image is used to detect motion in a highly selective manner and to
track moving objects within the building and the surrounding area. Motion
can be distinguished based on criteria appropriate to the environment in
which the intrusion detection system operates.