US 7,561,104 B2
Method to modify calibration data used to locate a mobile unitGeneral
US 7,561,104 B2
Method to modify calibration data used to locate a mobile unit
Tech Center:
3600 Transportation, Construction, Electronic Commerce, Agriculture, National Security and License and Review
Examiner:
Dao L Phan
Art Unit:
3662 Computerized Vehicle Controls and Navigation, Radio Wave, Optical and Acoustic Wave Communication, Robotics, and Nuclear Systems
Agent:
Inventors:
Martin Alles; John Carlson; George Maher; Selcuk Mazlum
Assignee:
Priority:
02/05/08
Filed:
02/05/08
Granted:
07/14/09
Expiration:
02/05/27
Abstract
A method of modifying calibration data used to geo-locate a mobile station located in an indoor environment is disclosed. When a mobile station is located indoors, the signal strength of signals received and/or transmitted by the mobile station have the tendency to be lower than the strength of the signals received by a mobile station located outdoors. As a result of these lower signal strengths, geo-location efforts which rely on signal strengths may result in unsatisfactory location accuracy. Modifying pre-existing calibration data obtained outdoors may provide a way to simulate indoor calibration data characteristics.
Cooperative Patent Classification (CPC)
H04H04W4/029H04WG01S5/02526G01S