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:
Jan. 01, 2008
Filed:
Jul. 30, 2004
Frank N. Bauregger, Mountain View, CA (US);
Kurt R. Zimmerman, Mountain View, CA (US);
H. Stewart Cobb, Palo Alto, CA (US);
Jamal Izadian, San Jose, CA (US);
Frank N. Bauregger, Mountain View, CA (US);
Kurt R. Zimmerman, Mountain View, CA (US);
H. Stewart Cobb, Palo Alto, CA (US);
Jamal Izadian, San Jose, CA (US);
Novariant, Inc., Fremont, CA (US);
Abstract
In a local positioning system, augmentation of the land-based system is provided by receiving signals from a GNSS. The signals from the land-based positioning system have a code phase accuracy better than one wavelength of a carrier of the signals from the GNSS. Different decorrelation may be used for signals from a satellite than from a land-based transmitter, such as using a digital decorrelator for signals from the satellite and an analog decorrelator for signals from a land-based transmitter. The receivers may include both a GNSS antenna and a local antenna. The phase centers of the two antennas are within one wavelength of the GNSS signals from each other. The local antenna is sized for operation in the X or ISM-bands of frequencies. The GNSS antenna is a patch antenna where the microwave antenna extends away from the patch antenna in at least one dimension.