The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2001
Filed:
Jan. 31, 2000
Applicant:
Inventor:
Louis A. Stilp, Berwyn, PA (US);
Assignee:
TruePosition, Inc., King of Prussia, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
G01S 1/24 ;
U.S. Cl.
CPC ...
G01S 1/24 ;
Abstract
An internal calibration method, used to calibrate a receiver system used in a wireless location system, comprises injecting a signal into the receiver system and utilizing the signal to obtain an estimate of the manner in which the transfer function of the receiver system varies across the bandwidth of the receiver system. This estimate is used to mitigate the effects of the variation of the transfer function on time measurements made by the receiver system. Such time measurements are used to locate mobile transmitters.