Coordinated frequency hop jamming and GPS anti-jam receiver

Details Coordinated frequency hop jamming and GPS anti-jam receiver Coordinated frequency hop jamming and GPS anti-jam receiver

2011-01-18

2011-01-18

Payne, David C (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S346000

Reexamination Certificate

active

07873095

ABSTRACT:
An anti-jam receiver for coordinating with a frequency hop jammer includes a receiver assembly for receiving a spread spectrum signal, and a processor for removing an undesired signal from the spread spectrum signal. The processor utilizes an anti-jam algorithm in the frequency domain. The processor has an update interval during which frequencies that have been identified with undesired signals are removed from the spread spectrum signal. The frequency hop jammer has a hop interval during which a jamming signal is transmitted at a constant frequency. By coordinating the update interval of the processor with the hop interval of the frequency hop jammer, the frequency hop jammer appears to be a continuous wave jammer to the anti-jam receiver, while appearing to be a broadband jammer to other anti-jam systems that are not coordinated with the hop interval of the frequency hop jammer.

REFERENCES:
patent: 6115409 (2000-09-01), Upadhyay et al.
patent: 6931292 (2005-08-01), Brumitt et al.
patent: 7239843 (2007-07-01), Jung
patent: 2003/0007553 (2003-01-01), Fifield

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