Digital radio frequency memory (DRFM) is an approach being
adopted by modern electronic attack (EA) systems to combat pulse-compression
radar. A digital radio frequency memory system receives radar
pulses, stores these in a digital delay line, and retransmits
then some time later. This causes the radar to receive
a return that places the target in an incorrect location.
Pulse
compression and pulse coding radars must vary their compression or
coding parameters to minimise the effects of digital radio frequency
memory jamming.
Other topics in our resources on Radar related to Digital Radio Frequency Memory include: