摘要
极化敏感阵列测向是近年来空间谱测向的一个重要分支,与传统的标量阵列相比,它能同时利用信号的角度信息和极化信息,在理论上有明显的优越性能。对极化敏感阵列的信号模型和测角原理进行了分析和推导,通过仿真验证了算法的有效性。并进一步对比分析了辐射源极化状态、信号信噪比、快拍数、通道相位不一致性等工程非理想性因素对角度估计误差的影响。仿真结果表明,相比普通标量阵列,极化敏感阵列对辐射源的极化状态适应范围更宽,但对工程非理想因素更加敏感。
Polarization sensitive array is an important branch of spatial spectrum. Compared with scalar array, it has higher performance theoretically because of the angle and polarization information. The signal model and DOA estimation principle are analyzed and obtained. The descending dimension method is used for angle-polarization four-dimensional spectrum, and the simulation results are presented to show the efficiency of this method. The influence on angle deviation by engineering non-ideal factor including source polarization state,signal-noise radio, number of snap shot and phase consistency are discussed. Simulation results show that polarization sensitive array is better adaptability to polarization,but it is more sensitive to engineering non-ideal factors compared with scalar array.
作者
杨春宇
姜红军
颜振亚
Yang Chunyu;Jiang Hongjun;Yan Zhenya(Nanjing Research Institute of Electronic Technology,Nanjing 210039,Jiangsu,China)
出处
《航天电子对抗》
2019年第4期20-25,共6页
Aerospace Electronic Warfare
关键词
极化敏感阵列
空间到达角
工程误差
极化参数
polarization sensitive array
DOA
engineering errors
polarization parameter
