Geolocation with radio-frequency ranging
First Claim
1. A system comprising:
- an originator device configured to transmit a first wireless signal to a transponder device;
the transponder device is configured to transmit a second wireless signal to the originator device;
at least one observer device configured to receive the first wireless signal from the originator device and receive the second wireless signal from the transponder device, andat least one processor configured to calculate a transactional difference range at the at least one observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device,wherein the at least one processor is further configured to calculate the transactional difference range at the observer device bymeasuring an observer time difference, corresponding to the time period between receiving the first wireless signal at the observer device and receiving the second wireless signal at the observer device,measuring a first phase value, corresponding to the phase of the first wireless signal received at the observer device, andmeasuring a second phase value, corresponding to the phase of the second wireless signal received at the observer device.
1 Assignment
0 Petitions
Accused Products
Abstract
A geolocation system includes an originator device configured to transmit a first wireless signal to a transponder device. The transponder device is configured to transmit a second wireless signal to the originator device. The system includes at least one observer device configured to receive the first wireless signal from the originator device and receive the second wireless signal from the transponder device. The system also includes a first processor configured to calculate a transactional difference range at the at least one observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device. A corrected transactional difference range value may be calculated by subtracting a time-of-flight of the first wireless signal from the originator device to the transponder device from the transactional difference range. A method of performing geolocation using a transactional difference range is also disclosed.
-
Citations
49 Claims
-
1. A system comprising:
-
an originator device configured to transmit a first wireless signal to a transponder device; the transponder device is configured to transmit a second wireless signal to the originator device; at least one observer device configured to receive the first wireless signal from the originator device and receive the second wireless signal from the transponder device, and at least one processor configured to calculate a transactional difference range at the at least one observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device, wherein the at least one processor is further configured to calculate the transactional difference range at the observer device by measuring an observer time difference, corresponding to the time period between receiving the first wireless signal at the observer device and receiving the second wireless signal at the observer device, measuring a first phase value, corresponding to the phase of the first wireless signal received at the observer device, and measuring a second phase value, corresponding to the phase of the second wireless signal received at the observer device. - View Dependent Claims (2, 3)
-
-
4. An observer device comprising:
-
a radio device configured to receive a first wireless signal from an originator device and to receive a second wireless signal from a transponder device; and a processor configured to calculate a transactional difference range at the observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device, wherein the radio device is further configured to receive a data transmission from the originator device, wherein the data transmission comprises information related to a round-trip time-of-flight measurement between the originator device and the transponder device; and wherein the processor is further configured to calculate a corrected transactional difference range value at the observer device using the transactional difference range and at least part of the information related to the round-trip time-of-flight measurement between the originator device and the transponder device.
-
-
5. An observer device comprising;
-
a radio device configured to receive a first wireless signal from an originator device and to receive a second signal from a transponder device; and a processor configured to calculate a transactional difference range at the observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device, wherein the processor is further configured to calculate the transactional difference range at the observer device by measuring an observer time difference, corresponding to the time period between receiving the first wireless signal at the observer device and receiving the second wireless signal at the observer device, measuring a first phase value, corresponding to the phase of the first wireless signal received at the observer device, and measuring a second phase value, corresponding to the phase of the second wireless signal received at the observer device. - View Dependent Claims (6)
-
-
7. A system comprising:
-
an originator device configured to transmit a first wireless signal to a first transponder device and to transmit a second wireless signal to a second transponder device; the first transponder device is configured to transmit a third wireless signal to the originator device; the second transponder device is configured to transmit a fourth wireless signal to the originator device; at least one observer device comprising; an observer radio configured to receive the first and second wireless signals from the originator device, to receive the third wireless signal from the first transponder device, and to receive the fourth wireless signal from the second transponder device, and a first processor configured to calculate a first transactional difference range at the observer device based on the first wireless signal and the third wireless signal, and to calculate a second transactional difference range at the observer device based on the second wireless signal and the fourth wireless signal. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A method comprising:
-
transmitting a first wireless signal Iron an originator device to a transponder device; transmitting a second wireless signal from the transponder device to the originator device; receiving the first wireless signal transmitted from the originator device at least one observer device; receiving the second wireless signal transmitted from the transponder device at the at least one observer device; and calculating a transactional difference range at the at least one observer device based on the first wireless signal received at the observer device and the second wireless signal received at the observer device, wherein calculating the transactional difference range at the observer device comprises; measuring an observer time difference, corresponding to the time period between receiving the first wireless signal at the observer device and receiving the second wireless signal at the observer device; measuring a first phase value, corresponding to the phase of the first wireless signal received at the observer device; and measuring a second phase value, corresponding to the phase of the second wireless signal received at the observer device. - View Dependent Claims (14)
-
-
15. A system comprising:
-
a coordinator configured to instruct a first transceiver device in a plurality of transceiver devices to initiate a first round-trip time-of-flight measurement with a second transceiver device in the plurality of transceiver devices; the first transceiver device comprising a first transceiver radio configured to transmit a first wireless signal to the second transceiver device as part of the first round-trip time-of-flight measurement; the second transceiver device comprising a second transceiver radio configured to transmit a second wireless signal to the first transceiver device as part of the first round-trip time-of-flight measurement; and at least one observer device comprising an observer radio configured to receive the first wireless from the first transceiver device and to receive the second wireless signal from the second transceiver device, and an observer processor configured to calculate a transactional difference range at the at least one observer device based on the first wireless signal and the second wireless signal. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A system comprising:
a plurality of transceiver devices, wherein each transceiver device in the plurality of transceiver devices is configured to perform a round-trip time-of-flight measurement with at least one other transceiver device in the plurality of transceiver devices, and calculate a transactional difference range when the transceiver device is not performing a round-trip time-of-flight measurement with at least one other transceiver device. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
43. A method of locating an observer comprising:
-
performing a round-trip time-of-flight measurement between an originator and a transponder; calculating a transactional difference range at the observer based on the round-trip time-of-flight measurement; and estimating a position of the observer based on the transactional difference range and a value related to the distance between the observer and the transponder. - View Dependent Claims (44, 45, 46, 47, 48, 49)
-
Specification