Title:
無線位置情報システムを補正するための方法及びシステム
Document Type and Number:
Japanese Patent JP2004531737
Kind Code:
A
Abstract:
This invention relates to a method for calibrating a wireless location system (WLS) to enable the system to make highly accurate differential measurements such as time difference of arrival (TDOA) and frequency difference of arrival (FDOA). Calibration is accomplished by transmitting a signal from an unknown location and measuring at each of two receivers the parameter to be calibrated from that part of the received signal reflected or refracted from an object at a known location in the area. A differential measurement error is determined by comparing the expected difference in the parameter measurements with the actual difference in the parameter measurements. The expected difference is known, a priori, based on the locations of the receivers and the location of the object.
Inventors:
Brian Holt
Application Number:
JP2003507965A
Publication Date:
October 14, 2004
Filing Date:
June 20, 2002
Export Citation:
Assignee:
Harris Corporation
International Classes:
G01S5/06; G01S5/02; G01S19/11; (IPC1-7): G01S5/06
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito
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