摘要
在非正侧阵雷达中的杂波谱随距离发生变化,造成杂波统计特性估计不准确,空时二维自适应处理中滤波器的杂波凹口变宽。为了克服这个难题,根据杂波模型提出了一种基于相似性度量的谱补偿方法。该方法首先将待检单元的导向矢量与相邻单元的导向矢量进行内积,作为谱结构相似性的度量,然后依此度量值,对接收数据的杂波协方差矩阵进行加权处理,最后用传统的空时自适应算法进行杂波抑制。仿真证明了该方法可以有效地消除杂波谱的非平稳性,提高雷达抑制杂波的性能。
The clutter spectrum depends on range in non-sidelooking arrays,which leads to inaccuracy estimation of clutter statistical property and a wide clutter notch in space-time adaptive processing （STAP）. According to clutter model, we present a method for compensation of clutter spectrum base on similar measure. The similarity measure for spectrum structure is described by a set of values defined by the inner product between the steering vector of range bin under test and of adjacent range bins. The clutter covariance matrix is weighted by these values and then conventional STAP could be applied to the clutter suppression. Simulation results show a good improvement in processor performance.
出处
《电波科学学报》
EI
CSCD
北大核心
2009年第6期1078-1081,1093,共5页
Chinese Journal of Radio Science
基金
国家杰出青年科学基金项目(No.60825104)
国家自然科学基金资助项目(No.60736009)
教育部长江学者和创新团队支持计划(IRT0645)
关键词
相似性度量
非正侧视雷达
杂波谱补偿
similar measure
non-sidelooking radar
clutter spectrum compensation
