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Even if the data is not extracted or changed, an interference signal hitting the interfering bands could cause the transmitter to stay on much longer than it normally would. The cumulative effect would be to drain the batteries much faster than intended to bring down a buried or remote link.
Developed by the Army Rapid Capabilities Office (RCO), the combination of wireless jamming, jamming, and hacking attacks from vehicle systems forces enemy tanks to "stop, dismount, step out of protection, [and] reduce their mobility "as one Army Observer described the ANTC training exercise at Fort Irwin, California.
A GPS jammer works by having the same frequency and signal strength higher than the expected signal at the receiver. So if the jammer has enough power and a wide enough signal spectrum it could jam all receivers on one base. Another way is to get stuck with a copy of the expected signal and trick the receiver into receiving the jammer instead of the expected signal.