System and method for position determination by impulse radio
First Claim
1. A method for synchronization of a plurality of ultra wideband radios, said method comprising the steps of:
- a. obtaining at each of said plurality of ultra wideband radios a synchronization signal corresponding to an external clock;
b. synchronizing internal clocks of each of said plurality of ultra wideband radios with said synchronization signal;
c. receiving at each of said plurality of ultra wideband radios an ultra wideband signal transmitted by another ultra wideband radio; and
d. determining a position of said another ultra wideband radio based upon the times of arrival of said ultra wideband signal received at said plurality of ultra wideband radios.
2 Assignments
0 Petitions
Accused Products
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.
-
Citations
16 Claims
-
1. A method for synchronization of a plurality of ultra wideband radios, said method comprising the steps of:
-
a. obtaining at each of said plurality of ultra wideband radios a synchronization signal corresponding to an external clock; b. synchronizing internal clocks of each of said plurality of ultra wideband radios with said synchronization signal; c. receiving at each of said plurality of ultra wideband radios an ultra wideband signal transmitted by another ultra wideband radio; and d. determining a position of said another ultra wideband radio based upon the times of arrival of said ultra wideband signal received at said plurality of ultra wideband radios. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A system for synchronization of a plurality of ultra wideband radios, said system comprising:
-
an external clock; a synchronization signal corresponding to said external clock, said synchronization signal being obtained by each of said plurality of ultra wideband radios, each of said plurality of ultra wideband radios synchronizing its internal clock with said synchronization signal; and a processor for determining a position of another ultra wideband radio having transmitted a ultra wideband signal based upon times of arrival of said ultra wideband signal at said plurality of ultra wideband radios. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification