摘要
为了给机载雷达海杂波的STAP处理提供自由度信息和功率分布信息,以脉冲多普勒相控阵雷达为基础,分析了正侧阵、斜面阵和前向阵3种阵面下机载雷达空时二维海杂波的分布特性,提出了一种K分布海杂波生成方法,实现了3种阵面下海杂波特征谱和功率谱的仿真。仿真结果表明,机载雷达空时二维海杂波的自由度比地杂波大0.6-2.5倍,因此,海杂波滤波器的阶数需增大相同倍数;同时,海杂波功率谱波脊比地杂波宽很多,设计滤波器的频域响应时要作相应调整。
In order to provide the freedom and power distribution information in the spatial-temporal adaptive processing for airborne radar sea clutter,the distribution characteristics of airborne phased array radar spatial-temporal sea clutter in sidelooking,slant-side looking,and forward looking cases are discussed base on pulse Doppler phased array.A generation method of K distribution sea clutter is proposed,and the three fronts of eigenspectrum and power spectrum of airborne radar sea clutter are simulated respectively.The results show that the freedom of sea clutter is 0.6-2.5times higher than ground clutter.So the orders of the filter are increased by the same times,the wave ridge of sea clutter power spectrum is extended to ground clutter,the frequency response of filter is adjusted at the same time.
出处
《桂林电子科技大学学报》
2015年第5期350-355,共6页
Journal of Guilin University of Electronic Technology
基金
广西自然科学基金(2013GXNSFFA019004)
关键词
机载雷达
3种阵面
海杂波
特征谱
功率谱
airborne radar
three fronts of arrays
sea clutter
eigenspectrum
power spectrum
