Patent ID: 7414705

Claim:
A sensing device for providing touchless control comprising: a pulse shaper for producing a pulse shaped signal, the pulse shaped signal intended for reflecting off a first object to produce a reflected signal, wherein at least one portion of the pulse shaped signal is at least one among a frequency modulated region, constant frequency region, phase modulated region, and a chirp region; a phase detector for receiving and identifying a relative phase of the reflected signal with respect to a previously received reflected signal, and a processor operatively coupled to the pulse shaper for receiving the reflected signal, tracking a location and a movement of the first object from an estimated arrival time of the reflected signal and the relative phase, and providing control to a second object that is a user interface control in accordance with the location and the movement of the first object, wherein the processor estimates the location of the first object from a frequency modulated region of the reflected signal, and a velocity of the first object from the relative phase from the constant frequency region of the reflected signal.