Low Cost FPGA based Implementation of a DRFM System

Digital Radio Frequency Memory (DRFM) is a technique used to record an incoming Radio Frequency (RF) signal and apply series of time-delays, amplitude scalings and frequency shifts before retransmitting the signal in an effort to deceive a radar system. This technique is used widely in the electronic defense industry as a form of radar countermeasure by synthesising artificial targets. The design and implementation of a DRFM system on a low cost Field Programmable Gate Array (FPGA) is shown along with an investigation of the performance of the system architecture.