H
ELECTRICITY
H
ELECTRICITY
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04
ELECTRIC COMMUNICATION TECHNIQUE
H04K
SECRET COMMUNICATION; JAMMING OF COMMUNICATION
H04K
SECRET COMMUNICATION; JAMMING OF COMMUNICATION
H04K3/00
Jamming of communication; Counter-measures
H04K3/00
Jamming of communication; Counter-measures
H04K3/20
Countermeasures against jamming
H04K3/20
Countermeasures against jamming
H04K3/22
including jamming detection and monitoring
H04K3/22
including jamming detection and monitoring
H04K3/224
with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
H04K3/224
with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
H04K3/226
Selection of non-jammed channel for communication
H04K3/226
Selection of non-jammed channel for communication