基于稀疏阵列和码分信号的机载预警雷达STAP研究

基于稀疏阵列和码分正交信号，研究了机载雷达的空时自适应处理（STAP）技术，用于空中预警背景下的地面杂波抑制和运动目标探测。提出了稀疏阵列码分多相位中心孔径综合方法，采用正交编码信号实现多发多收，使综合后不同编码信号的相位中心在数量和分布情况上和满阵天线的相同，从而避免了稀疏阵列天线旁瓣较高的问题；在孔径综合的基础上，利用空时自适应处理方法完成杂波抑制，实现运动目标检测。仿真结果表明了本文方法的有效性。

Airborn Early Warning Radar STAP Based on Thinned Array and Code Division Signal

On the basis of a thinned array and code division signals, the space time adaptive processing (STAP) on an airborne radar is investigated to carry out ground clutter suppression and moving target detection. The multiple phase center aperture synthesis method in code division mode is proposed to make the synthesized phase centers coincident with a full array both in quantity and distribution. This is realized by making use of the orthogonal code signals to achieve multiple-input and multiple-output, thus avoiding the high side lobes of a thinned array. Based on aperture synthesis, the STAP is used to achieve clutter suppression, and implement moving targets detection. Simulation results demonstrate the validity of the method proposed in the article.