Wireless positioning method, wireless positioning apparatus, and mobile station

• US 8,659,478 B2
• Filed: 01/12/2011
• Issued: 02/25/2014
• Est. Priority Date: 01/13/2010
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Kim, Kanghee, Yeo, Geon Min
• Primary Examiner(s): GALT, CASSI J
• Application Number:
  US13/005,282
• Publication Number:
  US 20110171993A1
• Time in Patent Office: 1,140 Days
• Field of Search: 342/451, 342/458, 342/464, 4554561-4566
• US Class Current: 342/464
• CPC Class Codes: G01S 5/02524 Creating or updating the radio-map

Abstract

A wireless positioning apparatus receives a plurality of channel responses for a plurality of locations, generates a plurality of channel response patterns from the plurality of channel responses, and stores the plurality of channel response patterns. The wireless positioning apparatus receives an estimated channel response from a mobile station and compares the estimated channel response with the plurality of channel response patterns to estimate a location of the mobile station. The wireless positioning apparatus provides the estimated location information to the mobile station.

Claims

1. A wireless positioning method of a wireless positioning apparatus, comprising:

receiving a plurality of channel responses for a plurality of locations, each channel response including signal attenuation, time delay, and delay spread as characteristics for the respective location;

generating a plurality of channel response patterns using the plurality of channel responses, the generating including grouping information within a predetermined time tap of a channel response corresponding to at least one of the plurality of locations to extract peak value and slope from a respective group and generating the channel response pattern for the at least one of the plurality of locations based on the peak value and slope;

storing in a memory the plurality of channel response patterns in connection with the plurality of locations; and

estimating a location based on the plurality of channel response patterns, wherein

each of the receiving, generating, storing, and estimating are performed by one or more processors.

2. The wireless positioning method of claim 1, wherein estimating the location comprises:

receiving an estimated channel response from a mobile station; and

comparing the estimated channel response with the plurality of channel response patterns to provide an estimated location information of the mobile station.

3. The wireless positioning method of claim 2, further comprising:

providing the estimated location information to the mobile station.

4. The wireless positioning method of claim 1,

wherein accumulating the plurality of channel response patterns further comprises:

assigning weight values to the plurality of channel response pattern to generate the channel response patterns for the at least one of the plurality of locations.

5. The wireless positioning method of claim 1,

wherein generating the plurality of channel response patterns further comprises:

normalizing samples of a channel response corresponding to at least one of the plurality of locations to generate the channel response pattern for the at least one of the plurality of locations.

6. A wireless positioning apparatus, comprising:

a first receiver configured to receive a plurality of channel responses for a plurality of locations, each channel response including signal attenuation, time delay, and delay spread as characteristics for the respective location;

a pattern generator configured to generate a plurality of channel response patterns from the plurality of channel responses, and to group information within a predetermined time tap of a channel response corresponding to at least one of the plurality of locations to extract peak value and slope from a respective group and to generate the channel response pattern for the at least one of the plurality of locations based on the peak value and slope;

a second receiver configured to receive an estimated channel response from a mobile station; and

a location estimator configured to compare the estimated channel response with the plurality of channel response patterns to estimate a location of the mobile station.

7. The wireless positioning apparatus of claim 6, further comprising:

a first transmitter configured to provide an estimated location information to the mobile station.

8. The wireless positioning apparatus of claim 7, further comprising:

a second transmitter configured to transmit a reference signal used for channel response estimation.