摘要
提出了一种基于双L型阵的二维测向算法。通过定义新的三维波达方向角,同时利用旋转不变算法获得每一维入射角的独立估计,再由波达方向角之间的约束关系进行配对,提高了测向精度与二维角成功配对概率,改善了双L阵二维测向精度对来波方向敏感的问题。计算机仿真结果表明:所提算法在观测的区域内均具有较高测向精度,特别是在仰角较小时较传统算法其测向精度有较大提高,在低信噪比情况下与传统算法比较提高了二维测向中的角度配对成功概率。
This paper presents a novel method of two-dimensional （2-D） direction finding based on two L-shape arrays. A new type of three-dimensional （3-D） direction angles has been defined in this method. The angles along each coordinate axis are estimated via rotational invariance techniques（ESPRIT） of uniform linear array （ULA）. All estimated angles get pair-matched by spatial relationships of their direction cosines. Simulation results show that the proposed method has good performance in the observation range, higher estimation accuracy than the conventional method especially when the elevation angle is small, and higher success rate of pairmatching than the conventional method at low signal-to-noise ratio （SNR）.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第5期882-887,共6页
Chinese Journal of Radio Science
关键词
方向余弦
测向
估计精度
配对
双L型阵
direction cosine
direction finding
estimated accuracy
pair-matching
two L-shape array
