Patent ID: 7809077

Claim:
A method for stabilizing time position of an ultra-wideband signal, comprising: shaping an ultra-wideband signal according to a first reference ultra-wideband signal thus forming a shaped ultra-wideband signal, emitting the shaped ultra-wideband signal to space, receiving a received ultra-wideband signal, processing the received ultra-wideband signal by mixing it with a second reference ultra-wideband signal thus forming a correlated ultra-wideband signal, wherein, while processing the received ultra-wideband signal, said second reference ultra-wideband signal being delayed by a time during which an initial position of a check point in a middle range between maximum and minimum voltages of the correlated ultra-wideband signal being set, regularly monitoring a position of said check point, and when the position of said check point shifts from the initial position, a delay in emitting the shaped ultra-wideband signal to space is changed for resetting the position of said check point to the initial position.