Radar vulnerability to jamming

The effects of jamming on the closed-loop subsystems of a radar are investigated by means of numerical simulations, with a focus on effects which are of long duration relative to the radar pulse length or pulse-repetition interval. The fundamental principles of electronic countermeasures and jamming are reviewed, and particular attention is given to noise jamming; range, angle, and velocity deception; on-off jamming of automatic gain control; feedback control systems; target-coordinate measurement and target tracking; and radar-jamming simulations. It is demonstrated that PC-based simulations provide an efficient method for the analysis of closed-loop systems.