Self-adaptive frequency agility realized with FPGA

Searching radar or surveillance radar has to resist diversified jamming; self-adaptive frequency agility is an important and effective function for radars to resist jamming. The detailed steps to achieve this function are described, and the function is realized with FPGA using hardware description language, the validity is proved by on-line sampling and simulation. The self-adaptive frequency agility module can analyze the type of jamming to select transmitting frequency to avoid the frequencies which have interference, under frequency diversity and fixed frequency, respectively. The practical application on a searching radar shows that the module has good real-time and anti-jamming capacity.