Patent Number: 6,297,773

Title: System and method for position determination by impulse radio

Abstract: A system and a method for position determination by impulse radio using a first transceiver having a first clock providing a first reference signal and a second transceiver placed spaced from the first transceiver. The system determines the position of the second transceiver. The second transceiver has a second clock that provides a second reference signal. A first sequence of pulses are transmitted from the first transceiver. The first sequence of pulses are then received at the second transceiver and the second transceiver is then synchronized with the first sequence of pulses. A second sequence of pulses are transmitted from the second transceiver. The first transceiver receives the second sequence of pulses and the first transceiver is synchronized with the second sequence of pulses. A delayed first reference signal is generated in response to the synchronization with the second sequence of pulses. A time difference between the delayed first reference signal and the first reference signal is then measured. The time difference indicates a total time of flight of the first and second sequence of pulses. The distance between the first and the second transceiver is determined from the time difference. The direction of the second transceiver from the first transceiver is determined using a directional antenna. Finally, the position of the second transceiver is determined using the distance and the direction.

Inventors: Fullerton; Larry W. (Huntsville, AL), Richards; James L. (Fayetteville, TN), Cowie; Ivan A. (Madison, AL)

Assignee: Time Domain Corporation

International Classification: G01S 13/00 (20060101); G01S 13/76 (20060101); G01S 13/42 (20060101); G01S 003/02 ()

Expiration Date: 10/02/2018