雷达关联成像中的阵元位置误差分析  

Analysis of Array Position Error in Radar Coincidence Imaging

作　　者：徐先武 程永强[1] 秦玉亮[1] 周小利[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《现代雷达》2016年第3期32-37,42,共7页Modern Radar

基　　金：国家自然科学基金资助项目(61302149;6117133)

摘　　要：雷达关联成像是一种全新的凝视高分辨成像方法,在军事上有着广阔的应用前景。文中针对阵列雷达普遍存在的阵元位置误差问题,建立了存在阵元位置误差下的雷达关联成像模型,得到了泰勒展开下目标回波与阵元位置误差的线性关系;推导了存在阵元位置误差条件下雷达关联成像的理论误差限,准确预测了阵元个数、信号带宽、成像单元尺寸和数目、目标散射系数和散射中心数目对成像误差的影响。研究结果为雷达关联成像系统参数的设置以及阵元位置误差补偿提供了一定的参考和依据。As a novel high-resolution staring imaging technique, radar coincidence imaging （RCI）} shows the great potentials in military applications. In this paper, the array position error which exists in array radar generally is considered; the RCI model in the presence of array position error is established. To obtain the analytic result, the nonlinear relationship between the echo and array position error is approximated linearly by the first-order Taylor expansion, thus the theoretical error bound of RCI with array position error is derived. Then the influences of several factors on imaging error are precisely predicted, including the number of array elements, signal bandwidth, the size and number of imaging cells, the coefficients and number of scattering centers. The conclusions and results could provide references for the parameter setup of RCI system and compensation of array position error.

关 键 词：阵列雷达 雷达关联成像 阵元位置误差 克拉美罗下界 

分 类 号：TN957.52[电子电信—信号与信息处理]