Patent ID: 6492906
Filing Date: 2002-12-10
Classification: G01S,G08B,H04B

Abstract:
A system comprising:an ultra wideband impulse radio transmitter capable of transmitting an impulse radio signal and further capable of being attached to a person under house arrest; an ultra wideband impulse radio receiver capable of initiating an alarm for monitoring personnel located near a central station whenever the ultra wideband impulse radio receiver fails to receive the transmitted impulse radio signal indicating that the person has moved out of a receiving range of the ultra wideband impulse radio receiver; and a plurality of reference ultra wideband impulse radio units distributed at known locations within or near a home, wherein said central station is further capable of displaying a current position of the person within or near the home that was determined from the interaction between the ultra wideband impulse radio unit and at least two of the reference ultra wideband impulse radio units.