一种新的警戒雷达抗同频干扰技术

研究了同型号警戒雷达间同频干扰抑制问题，利用机械扫描警戒雷达扫描周期固定不变的特点，提出了一种新的旋转周期动目标检测( MTI)对消的同频干扰抑制方法。建立了警戒雷达方位扫描周期内的同频干扰模型，分析了常规MTI技术无法消除同频干扰的原因。借鉴传统MTI原理，针对警戒雷达同频干扰在方位扫描周期内慢速且规律性时变的特点，将MTI对消周期扩展为天线旋转周期，从而达到了良好的同频干扰对消效果。理论分析和仿真结果验证了这种旋转周期MTI对消技术在抗同频干扰方面的有效性。

A new technique against common frequency jamming between warning radars

Suppression of common frequency jamming between same type warning radars is studied. According to the feature of fixed scan cycle of mechanical scanning warning radar,a new rotating cycle moving target detection(MTI) cancellation technique against common frequency jamming is presented. Mathematic model for common frequency jamming of warning radar is established,and the reason why conventional MTI technique cannot eliminate common frequency jamming is given. Because common frequency jamming varies slowly and regularly,rotating cycle MTI technique extends the MTI cancellation period to antenna rotation period,so as to achieve better jamming cancellation effect. Both theoretical analysis and simulation results prove that this new rotating cycle MTI technique is effective in term of common frequency jamming suppression.