基于时频信号分离的单脉冲雷达角闪烁抑制技术

Monopulse radar angle noise suppression technique based on the time frequency signal separation

研究了目标上多散射点回波多普勒频移之间的关系和时变特性，利用时频分析的信号分离技术把各散射点回波分开并分别测角，综合出一个中心角度．仿真结果表明该方法基本上克服了当目标很近时，传统单脉冲跟踪雷达测角，因目标已经不能被看作是单个散射点而出现的角闪烁现象．

During the measurement of the angle in a traditional monopulse tracking radar, an angle noise (glint) will occur when a target is close to the radar, because in this case the target can not be regarded as a single scatterer any more. The relationship between doppler frequencies of multiple scatterers on the target as well as their time varying characteristics are developed. Scatterer separation and angle measurement are completed by the technique of signal separation based on time frequency distribution, and then a center angle is synthesized to avoid the effect of angle noise. Computer simulation results show that this technique is effective.