This thesis introduces the elementary concept , evolutive history , working flow and operational principle of secondary surveillance radar and the systemic principle of monopulse secondary surveillance radar . then recommend the structrue and elements of actel �� fpga and the development and design of fpga based on vhdl . the new responder can detect the video pulse signal upon 100mv and deal with 40 real planes in real time . it also can identify the responding signal of mode a / c and mode 6 and can be swithed freely from one mode to another according to the mode information and transmit the report table of corresponding mode
मोबाइल