Design and application of DRFM system based on digital channelized receiver

A model of DRFM system based on digital channelized receiver is introduced, it takes the advantages of channelized receiver to achieve broadband instantaneous frequency coverage, and with decimated data flow, the requirement of the memory capacity for DRFM system can be saved and make it possible to achieve real-time amplitude and frequency modulation process in radar countermeasure applications. The DAC works at lower speed compared with ADC sample rate. The theory of channelized receiver is first stated and the realization structure based on polyphase filters is derived. The hardware platform has been designed for the implementation of the DRFM model; it can act as the core subsystem for general radar countermeasure system.