RANGE-ANGLE TWO-DIMENSIONAL ANTI JAMMING AGAINST DENSE FALSE TARGETS

Digital Radio Frequency Memory (DRFM), as an important deceptive jamming technology against modern radar system, can generate a large number of high-fidelity range false targets before and after real target, thus achieving effective jamming. When multiple jammers apply jamming from different angles, the resulting false targets are azimuthally deceptive, which will further impact subsequent target positioning and precise guidance. In response to the above-mentioned multi-angle dense false target jamming situation, this paper proposes a complete narrowband array radar anti-jamming algorithm, which effectively suppresses the range dimensional jamming by Multiplicative Noncoherent Accumulation (MNCA),and filters the residual angle dimensional jamming by spatial filtering, Wherein, the azimuths of the jammers are obtained by K-means dynamic clustering based on constructed angle data set. Theoretical analysis and simulation show that the method has good jamming suppression ability, and can achieve accurate target ranging and angle measuring.