Localized jamming of navigation signals
First Claim
1. A method of performing localized jamming of a navigation signal, wherein the navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite, the method comprising:
- filtering a noise source into a plurality of frequency bands to provide a plurality of filtered noise signals in the frequency bands, wherein the navigation signal is spread over a plurality of channels of the LEO signal, wherein the channels are distributed over the frequency bands and a plurality of time slots;
generating a pseudo random noise (PRN) sequence corresponding to a modulation sequence used by the LEO satellite to spread the navigation signal over the channels;
modulating the filtered noise signals using the PRN sequence to provide a plurality of modulated noise signals; and
broadcasting the modulated noise signals over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal, wherein the jamming bursts are configured to substantially mask the navigation signal in the area of operations.
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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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Citations
21 Claims
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1. A method of performing localized jamming of a navigation signal, wherein the navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite, the method comprising:
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filtering a noise source into a plurality of frequency bands to provide a plurality of filtered noise signals in the frequency bands, wherein the navigation signal is spread over a plurality of channels of the LEO signal, wherein the channels are distributed over the frequency bands and a plurality of time slots; generating a pseudo random noise (PRN) sequence corresponding to a modulation sequence used by the LEO satellite to spread the navigation signal over the channels; modulating the filtered noise signals using the PRN sequence to provide a plurality of modulated noise signals; and broadcasting the modulated noise signals over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal, wherein the jamming bursts are configured to substantially mask the navigation signal in the area of operations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A jamming device configured to perform localized jamming of a navigation signal, wherein the navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite, the device comprising:
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a noise source adapted to provide a noise signal; a plurality of filters adapted to filter the noise signal into a plurality of frequency bands to provide a plurality of filtered noise signals in the frequency bands, wherein the navigation signal is spread over a plurality of channels of the LEO signal, wherein the channels are distributed over the frequency bands and a plurality of time slots; a pseudo random noise (PRN) sequence generator adapted to provide a modulation sequence used by the LEO satellite to spread the navigation signal over the channels; a plurality of oscillators adapted to modulate the filtered noise signals using the PRN sequence to provide a plurality of modulated noise signals; and an antenna adapted to broadcast the modulated noise signals over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal, wherein the jamming bursts are configured to substantially mask the navigation signal in the area of operations. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A jamming device configured to perform localized jamming of a navigation signal, wherein the navigation signal comprises at least a portion of a low earth orbit (LEO) signal provided by a LEO satellite, the device comprising:
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means for filtering a noise source into a plurality of frequency bands to provide a plurality of filtered noise signals in the frequency bands, wherein the navigation signal is spread over a plurality of channels of the LEO signal, wherein the channels are distributed over the frequency bands and a plurality of time slots; means for generating a pseudo random noise (PRN) sequence corresponding to a modulation sequence used by the LEO satellite to spread the navigation signal over the channels; means for modulating the filtered noise signals using the generated PRN sequence to provide a plurality of modulated noise signals; and means for broadcasting the modulated noise signals over an area of operations to provide a plurality of jamming bursts corresponding to the navigation signal, wherein the jamming bursts are configured to substantially mask the navigation signal in the area of operations.
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Specification