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. 07, 1997
Filed:
May. 18, 1995
Khiem V Cai, Brea, CA (US);
Roger J O'Connor, Dove Canyon, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
A method and system for tracking the position of a moving transmitter using angle of arrival measurements from direction finding antenna arrays. Each array includes several elements, with the elements grouped to provide subarrays of different element spacings which are multiple of one half the transmitter wavelength. Ambiguity is rejected by processing angle data received from the subarrays. The signals from the arrays are processed to convert electrical phase delay into spatial angles, the spatial angle data is processed to provide the x,y position, velocity and acceleration of the transmitter. For transmitters mounted in moving vehicles, the system further processes the x,y data and applies a quality weighting factor that filters out multipath factors and permits estimation of vehicle profile information.