CAJ | 학술논문

该文提出一种机载雷达空时3维非自适应预滤波方法。利用可提前确定的载机偏航角、脉冲重复频率、阵元间距等雷达系统和载机平台信息，通过分析阵元在相邻两脉冲采样数据的结构，设计了一种空时3维非自适应滤波器，先滤除大部分杂波，使得剩余少部分杂波在降维自适应处理时能被充分抑制，提高了动目标检测性能。理论分析和仿真实验表明，该预滤波方法对载机偏航具有兼容性，能大大降低杂波自由度，在整个杂波区都有一定的性能改善，尤其在主瓣杂波区性能改善明显。
해문제출일충궤재뢰체공시3유비자괄응예려파방법。이용가제전학정적재궤편항각、맥충중복빈솔、진원간거등뢰체계통화재궤평태신식，통과분석진원재상린량맥충채양수거적결구，설계료일충공시3유비자괄응려파기，선려제대부분잡파，사득잉여소부분잡파재강유자괄응처리시능피충분억제，제고료동목표검측성능。이론분석화방진실험표명，해예려파방법대재궤편항구유겸용성，능대대강저잡파자유도，재정개잡파구도유일정적성능개선，우기재주판잡파구성능개선명현。
A 3-D space-time nonadaptive pre-filtering approach in airborne radar is proposed in this paper. It makes full use of predictable radar system and platform parameters such as airborne crab, Pulse Repetition Frequency (PRF) and interelement spacing, and the 3-D space-time nonadaptive filter is easily designed by analyzing the structure of the received sampling data of two adjacent pulses. Most clutter is filtered previously so that small part of residual clutter can be sufficiently suppressed by reduced-dimensional adaptive processing. The simulation results confirm that the proposed pre-filtering approach is compatible with airborne crab and can reduce the Degree of Freedom (DoF) of clutter, and the moving target detection performance is improved in the whole clutter region, especially in mainlobe region.