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:
Jun. 30, 2009
Filed:
May. 16, 2007
Clark E. Cohen, Washington, DC (US);
David A. Whelan, Newport Coast, CA (US);
Robert W. Brumley, Narbeth, 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, Narbeth, PA (US);
Gregory M. Gutt, Ashburn, VA (US);
Barton G. Ferrell, Troy, IL (US);
The Boeing Company, Chicago, IL (US);
Abstract
Various approaches to localized jamming of navigation signals are provided. In one embodiment, a navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite. A noise source is filtered to provide a plurality of filtered noise signals in a plurality of frequency bands. The navigation signal is spread over a plurality of channels of the LEO signal. The channels are distributed over the frequency bands and a plurality of time slots. A pseudo random noise (PRN) sequence is generated. The filtered noise signals are modulated using the PRN sequence to provide a plurality of modulated noise signals. The modulated noise signals are broadcast over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal. The jamming bursts are configured to substantially mask the navigation signal in the area of operations.