METHOD AND APPARATUS FOR WIRELESS LOCATION MEASUREMENT

• US 20110076975A1
• Filed: 09/28/2010
• Published: 03/31/2011
• Est. Priority Date: 09/28/2009
• Status: Abandoned Application

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Park, Jisoo, KIM, Kanghee
• Application Number:
  US12/892,385
• Publication Number:
  US 20110076975A1
• Time in Patent Office: Days
• US Class Current: 455/226.1
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• CPC Class Codes: H04B 17/27 for locating or positioning the transmitter
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/364 Delay profiles

Abstract

A wireless location measurement method of a receiver includes: receiving signals from a transmitter for a plurality of time intervals; extracting a final propagation delay tab profile based on a plurality of signals that are received for the plurality of time intervals; and calculating a distance between the transmitter and the receiver by using the final propagation tab delay profile. A wireless location measurement apparatus includes: a receiver for receiving signals from a transmitter for a plurality of time intervals; an accumulator for accumulating the plurality of signals and outputting an accumulated signal; a propagation delay tab extractor for extracting a propagation delay tab profile of the accumulated signal; and a location measurer for measuring a location by using the propagation delay tab profile.

Claims

1. A wireless location measurement method of a receiver, comprising:

receiving signals from a transmitter for a plurality of time intervals;

extracting a final propagation delay tab profile based on a plurality of signals that are received for the plurality of time intervals; and

calculating a distance between the transmitter and the receiver by using the final propagation tab delay profile.

2. The wireless location measurement method of claim 1, wherein

the extracting of a propagation delay tab profile includes:

accumulating the plurality of signals; and

extracting the final propagation delay tab profile based on the accumulated signals.

3. The wireless location measurement method of claim 2, wherein

the accumulating of a plurality of signals includes accumulating the plurality of signals by applying a weight value to the plurality of signals.

4. The wireless location measurement method of claim 3, wherein

the accumulating of a plurality of signals further includes:

extracting a plurality of propagation delay tab profiles corresponding to the plurality of signals;

determining reliability of the plurality of propagation delay tab profiles; and

calculating the weight value based on the reliability.

5. The wireless location measurement method of claim 4, wherein

the determining of reliability includes

determining the reliability by using a distribution of the propagation delay tabs in the plurality of propagation delay tab profiles.

6. The wireless location measurement method of claim 3, wherein

the accumulating of a plurality of signals further includes:

receiving weight value information from the transmitter; and

calculating the weight value by using the weight value information.

7. The wireless location measurement method of claim 1, wherein

the extracting of a propagation delay tab profile includes:

extracting a plurality of propagation delay tab profiles corresponding to the plurality of signals; and

determining the final propagation delay tab profile by accumulating the plurality of propagation delay tab profiles.

8. The wireless location measurement method of claim 7, wherein

the determining of a final propagation delay tab profile includes applying a weight value to the plurality of propagation delay tab profiles, and accumulating the plurality of propagation delay tab profiles.

9. The wireless location measurement method of claim 8, wherein

the determining of a final propagation delay tab profile further includes:

determining reliability of the plurality of propagation delay tab profiles; and

calculating the weight value based on the reliability.

10. The wireless location measurement method of claim 9, wherein

the determining of reliability includes

determining the reliability by using a distribution of the propagation delay tabs in the plurality of propagation delay tab profiles.

11. The wireless location measurement method of claim 8, wherein

the determining of a final propagation delay tab profile further includes:

receiving weight value information from the transmitter; and

calculating the weight value by using the weight value information.

12. A wireless location measurement apparatus comprising:

a receiver for receiving signals from a transmitter for a plurality of time intervals;

an accumulator for accumulating the plurality of signals and outputting an accumulated signal;

a propagation delay tab extractor for extracting a propagation delay tab profile of the accumulated signal; and

a location measurer for measuring a location by using the propagation delay tab profile.

13. The wireless location measurement apparatus of claim 12, wherein

the accumulator accumulates the plurality of signals by applying a weight value to the plurality of signals.

14. The wireless location measurement apparatus of claim 13, further including

a controller for calculating the weight value of the plurality of signals based on reliability of propagation delay tab profiles corresponding to the plurality of signals.

15. The wireless location measurement apparatus of claim 13, further including

a controller for calculating the weight value based on weight value information provided by the transmitter.

16. A wireless location measurement apparatus comprising:

a receiver for receiving signals from a transmitter for a plurality of time intervals;

a propagation delay tab extractor for extracting a plurality of propagation delay tab profiles corresponding to a plurality of signals that are received for the plurality of time intervals;

an accumulator for determining a final propagation delay tab profile by accumulating the plurality of propagation delay tab profiles; and

a location measurer for measuring a location by using the final propagation delay tab profile.

17. The wireless location measurement apparatus of claim 16, wherein

the accumulator accumulates the plurality of propagation delay tab profiles by applying a weight value to the plurality of propagation delay tab profiles.

18. The wireless location measurement apparatus of claim 17, further including

a controller for calculating the weight value of the plurality of propagation delay tab profiles based on reliability of the plurality of propagation delay tab profiles.

19. The wireless location measurement apparatus of claim 17, further including

a controller for calculating the weight value based on weight value information provided by the transmitter.