文档介绍：第 33 卷第 12 期通信学报 Vo l .3 3 No. 12
2012 年 12 月 Journal munications December 2012
doi:.1000-
新的双基地 MIMO 雷达角度估计方法
郑志东 1,张剑云 1,屈金佑 2,林秀清 1
(1. 合肥电子工程学院,安徽合肥 230037;2. 91635 部队,北京 102249)
摘要:为降低双基地 MIMO 雷达前端数据处理的计算量,构造出了“扩展”信号子空间,并根据此信号子空间
的特点,提出了多项式求根−空域滤波的收发角度估计算法,避免了二维谱搜索,实现了目标角度的自动配对,
并推导了多目标和单目标下双基地 MIMO 雷达角度估计的克拉默−拉奥下界(CRB)。研究表明空域滤波时,泰
勒级数展开的阶数越高,目标的角度估计精度越好;当目标各发射角度相隔较近时,仍能得到较好的估计结果;
在低信噪比时,估计精度优于 ESPRIT 算法,在高信噪比时,2 种算法的估计精度均接近于 CRB。
关键词:双基地 MIMO 雷达;角度估计;“扩展”信号子空间;多项式求根;空域滤波
中图分类号:TN958 文献标识码:B 文章编号:1000-436X(2012)12-0123-10
Novel method for angle estimating of bistatic MIMO radar
ZHENG Zhi-dong1, ZHANG Jian-yun1, QU Jin-you2, LIN Xiu-qing1
(1. Electronic Engineering Institute, Hefei 230037, China; 2. Unit 91635 of PLA, Beijing 102249, China)
Abstract: The extended signal subspace was constructed to reduce putation load of former data processing of
bistatic MIMO radar. According to the characteristic of this signal subspace, the polynomial rooting-spatial filtering algo-
rithm was proposed to estimate the direction of arrivals (DOA) and direction of departure (DOD). It avoided the conven-
tional two-dimensional spectrum searching and the estimated parameters were paired automatically without extra pairing
operation. Furthermore, Cramer-Rao bounds (CRB) for DOA and DOD estimation were derived under m