Method and apparatus for automatic jammer frequency control...

Details Method and apparatus for automatic jammer frequency control... Method and apparatus for automatic jammer frequency control...

2006-08-22

2006-08-22

Vo, Don N. (Department: 2611)

Pulse or digital communications

Spread spectrum

C342S014000, C455S001000

Reexamination Certificate

active

07095779

ABSTRACT:
A Method and Apparatus for Automatic Jammer Frequency Control of Surgical Reactive Jammers is disclosed. The system and method to autonomously and selectively jam frequency-hopping signals in near real-time. The system has the ability to automatically detect short duration signals (such as those output from frequency hoppers), to automatically determine if detected signal(s) should be jammed, and subsequently to automatically and extremely quickly activate the jamming transmitter on the frequency-hopper transmitter's frequency. Furthermore, the system improves upon the FFT-based front-end system by incorporating a module that automatically and iteratively comparing the digital FFT results to the analog RF signal to the arrive at a total frequency offset between the FFT results and the analog signal so that the transmitted jamming signal will be more accurately applied on the desired or target frequency. Finally, the system provides a programmable user interface so that operators can set up the system to act autonomously as intended, such that operator intervention is unnecessary when the system is placed in jamming operation mode.

REFERENCES:
patent: 6036351 (2000-03-01), Wagstaff
patent: 6335953 (2002-01-01), Sanderford et al.
patent: 2002/0051498 (2002-05-01), Thomas et al.
patent: 2003/0103589 (2003-06-01), Nohara et al.
patent: 2004/0042568 (2004-03-01), Rowitch
patent: 2004/0243258 (2004-12-01), Shattil

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