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:
Aug. 25, 2009
Filed:
May. 16, 2007
Clark E. Cohen, Washington, DC (US);
David A. Whelan, Newport Coast, CA (US);
Robert W. Brumley, Narberth, PA (US);
Gregory M. Gutt, Ashburn, VA (US);
Barton G. Ferrell, Troy, IL (US);
Clark E. Cohen, Washington, DC (US);
David A. Whelan, Newport Coast, CA (US);
Robert W. Brumley, Narberth, PA (US);
Gregory M. Gutt, Ashburn, VA (US);
Barton G. Ferrell, Troy, IL (US);
The Boeing Company, Chicago, IL (US);
Abstract
Low earth orbit (LEO) satellites are used to provide navigation signals. In one embodiment, a method of providing a LEO signal from a LEO satellite includes providing a plurality of transmit channels over a plurality of transmit slots. The transmit channels comprise a set of communication channels and a set of navigation channels. The method also includes generating a first pseudo random noise (PRN) ranging overlay corresponding to a navigation signal. The method further includes applying the first PRN ranging overlay to a first set of the navigation channels. In addition, the method includes combining the communication channels and the navigation channels into a LEO signal. The method also includes broadcasting the LEO signal from the LEO satellite.