Communications: directive radio wave systems and devices (e.g. – Radar ew – Ecm
Reexamination Certificate
2007-05-16
2009-06-30
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Radar ew
Ecm
C342S013000, C342S357490, C455S001000, C455S102000
Reexamination Certificate
active
07554481
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.
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Brumley Robert W.
Cohen Clark E.
Ferrell Barton G.
Gutt Gregory M.
Whelan David A.
Bythrow Peter M
Haynes and Boone LLP
Tarcza Thomas H
The Boeing Company
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