Position location using multiple carriers
AssigneeQUALCOMM Incorporated
InventorsDanlu Zhang, Aziz Gholmieh, Jilei Hou, Arnold J. Gum
Life of this patent
Estimating the term…
Abstract
A method of determining a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device on at least one multi-carrier signal including: receiving at least one multi-carrier signal; selecting at least two carrier signals from the at least one multi-carrier signal; measuring a signal characteristic of each of the at least two carrier signals; and determining the distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic of each of the at least two carrier signals.
Claims23
A method of determining a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device on at least one multi-carrier signal, the method comprising:
- receiving at least one multi-carrier signal;
- selecting at least two carrier signals from the at least one multi-carrier signal;
- measuring a signal characteristic of each of the at least two carrier signals;
- and
- determining the distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic of each of the at least two carrier signals, wherein determining the distance estimate comprises:
- determining a carrier timing estimate, based at least in part upon the first-arrival time, for each of a plurality of carrier signals from the at least one multi-carrier signal;
- and
- combining the carrier timing estimates to form a multi-carrier timing estimate;
- wherein the signal characteristic of the at least two carrier signals from the at least one multi-carrier signal is a first-arrival time.
A method of determining a distance estimate between a mobile device and a wireless transceiver of a wireless communication system, the wireless transceiver communicating with the mobile device on a multi-carrier signal, the method comprising:
- receiving the multi-carrier signal including a plurality of carrier signals generated using synchronized clocks;
- selecting one of the plurality of carrier signals as a reference carrier signal and selecting a remainder of the plurality of carrier signals as at least one non-reference carrier signal;
- and
- determining the distance estimate between the mobile device and the wireless transceiver using the reference carrier signal and the at least one non-reference carrier signal.
A method of determining a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device on a plurality of carrier signals from at least one multi-carrier signal, the method comprising:
- receiving the plurality of carrier signals from the at least one multi-carrier signal;
- aligning the plurality of carrier signals based on respective known time offsets to form aligned carrier signals;
- combining the aligned carrier signals to produce a composite signal;
- and
- determining the distance estimate between the mobile device and the wireless transceiver using the composite signal.
An apparatus configured to determine a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device on at least one multi-carrier signal, the apparatus comprising:
- a transceiver configured to receive the at least one multi-carrier signal;
- and
- a processor communicatively coupled to the transceiver and configured to:
- receive the at least one multi-carrier signal;
- select at least two carrier signals from the at least one multi-carrier signal;
- measure a signal characteristic of each of the at least two carrier signals;
- and
- determine the distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic of each of the at least two carrier signals, wherein the processor configured to determine is configured to:
- determine a carrier timing estimate, based at least in part upon the first-arrival time, for each of a plurality of carrier signals from the at least one multi-carrier signal;
- and
- combine the carrier timing estimates to form a multi-carrier timing estimate;
- wherein the signal characteristic of the at least two carrier signals from the at least one multi-carrier signal is a first-arrival time.
A computer program product comprising:
- a non-transitory processor-readable medium storing processor-readable instructions configured to cause a processor to:
- receive at least one multi-carrier signal for communication between a wireless transceiver and a mobile device;
- select at least two carrier signals from the at least one multi-carrier signal;
- measure a signal characteristic of each of the at least two carrier signals;
- and
- determine a distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic of each of the at least two carrier signals, wherein the instructions configured to cause the processor to determine the distance estimate comprises instructions configured to cause the processor to:
- determine a carrier timing estimate, based at least in part upon the first-arrival time, for each of a plurality of carrier signals from the at least one multi-carrier signal;
- and
- combine the carrier timing estimates to form a multi-carrier timing estimate;
- wherein the signal characteristic of the at least two carrier signals from the at least one multi-carrier signal is a first-arrival time.
An apparatus configured to determine a distance estimate between a mobile device and a wireless transceiver communicating with the mobile device using at least one multi-carrier signal, the apparatus comprising:
- means for receiving at least one multi-carrier signal;
- means for selecting at least two carrier signals from the at least one multi-carrier signal;
- means for measuring a signal characteristic of each of the at least two carrier signals;
- and
- means for determining the distance estimate between the mobile device and the wireless transceiver based at least partially upon the signal characteristic of each of the at least two carrier signals, wherein the means for determining the distance estimate comprises:
- means for determining a carrier timing estimate, based at least in part upon the first-arrival time, for each of a plurality of carrier signals from the at least one multi-carrier signal;
- and
- means for combining the carrier timing estimates to form a multi-carrier timing estimate;
- wherein the signal characteristic of the at least two carrier signals from the at least one multi-carrier signal is a first-arrival time.
Dependencies are inferred from the claim text.