DARPA’s ARC and BLADE developed Cognitive and Adaptive Electronic warfare Systems to Counter dynamic wireless communication and radar threats

Electronic warfare provide  means to counter adversary’s radar and communication systems  while protecting one’s own systems through  Electronic Attack (EA), Electronic Protection (EP) and Electronic Support (ES). Jamming systems still rely on classified databases of known emitter signals. As radars emit energy, an onboard receiver characterises the incoming signal and and compares it against the database of threats. If there’s a match, the system develops a pre-determined countermeasure that can be used to jam that signal.