Method and apparatus to perform reactive jamming while...

Details Method and apparatus to perform reactive jamming while... Method and apparatus to perform reactive jamming while...

2007-02-07

2010-10-19

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S132000, C375S133000, C375S131000, C375S135000, C375S130000

Reexamination Certificate

active

07817706

ABSTRACT:
Method and Apparatus to Perform Reactive Jamming While Simultaneously Avoiding Friendly Pseudo-Random Frequency Hopping Communications is disclosed. The system provides an enhancement to surgical reactive jammers that combines near-real-time jamming capability with the additional feature of allowing tactical communications. The jammer includes a synchronization subsystem that synchronizes jammer lockout frequencies with those frequencies being hopped to by units that are members of a friendly communications network. The synchronization subsystem is coordinated with, and therefore tied to the time-synchronized cryptography of the friendly communications net. As a result, the jammer will be aware, on a real-time basis, which frequency the friendly communications network will next be hopping to. The jammer's awareness of these future frequencies will allow those frequencies to be “locked out” of the jammer's transmission band dynamically.

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