Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04K
SECRET COMMUNICATION; JAMMING OF COMMUNICATION
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3/00
Jamming of communication; Counter-measures
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H04K3/20
Countermeasures against jamming
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H04K3/25
based on characteristics of target signal or of transmission; , e.g. using direct sequence spread spectrum or fast frequency hopping
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