System and method for determining location
AssigneesDENSO International America, Inc., Denso Corporation
InventorsKyle Cooper, Eric Smith
Life of this patent
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Abstract
A system and method for determining location information with respect to a portable device and an object. The system and method may be based on UWB communications, and more particularly with respect to a first path power determined with respect the UWB communications. In one embodiment, a differential first path power may be determined based on first and second first path power values obtained respectively by first and second devices via UWB communications with the portable device.
Claims20
A system for determining location information with respect to a portable device and an object, the system comprising:
- a first device disposed in a first fixed position relative to the object, the first device capable of communicating with the portable device in accordance with an ultra-wideband communication protocol, the first device operable to determine a first power characteristic indicative of a first path power of communications between the first device and the portable device;
- a second device disposed in a second fixed position relative to the object, the second device capable of communicating with the portable device in accordance with the ultra-wideband communication protocol, the second device operable to determine a second power characteristic indicative of a first path power of communications between the second device and the portable device;
- a controller operable to determine a differential first path power based on a difference between the first and second power characteristics respectively indicative of a first path power of communications between the first device and the portable device and a first path power of communications between the second device and the portable device;
- and
- the controller operable to determine the location information based on the differential first path power with respect to communications with the portable device in accordance with the ultra-wideband communication protocol.
A method of determining location information with respect to a portable device and an object, the method comprising:
- communicating between the portable device and a first device in accordance with an ultra-wideband communication protocol;
- generating a first power characteristic indicative of a first path power of communications between the first device and the portable device;
- communicating between the portable device and a second device in accordance with the ultra-wideband communication protocol;
- generating a second power characteristic indicative of a first path power of communications between the second device and the portable device;
- calculating a differential first path power based on a difference between the first and second power characteristics respectively indicative of a first path power of communications between the first device and the portable device and a first path power of communications between the second device and the portable device;
- and
- determining the location information based on the differential first path power with respect to communications with the portable device in accordance with the ultra-wideband communication protocol.
A device operable to determine location information with respect to a portable device and an object, the device comprising:
- a memory;
- a processor operably coupled to the memory, the processor configured to execute one or more instructions stored in the memory to:
- obtain a first power characteristic indicative of a first path power of ultra-wideband communications between a first device and the portable device, wherein the first device is disposed in a fixed position relative to the object;
- obtain a second power characteristic indicative of a first path power of ultra-wideband communications between a second device and the portable device, wherein the second device is disposed in a fixed position relative to the object;
- calculate a differential first path power based on a difference between the first and second power characteristics respectively indicative of a first path power of communications between the first device and the portable device and a first path power of communications between the second device and the portable device;
- and
- determine the location information based on the differential first path power with respect to ultra-wideband communications with the portable device.
Dependencies are inferred from the claim text.