空间角度耦合条件下二维干涉仪测向算法  

2D-Interferometer Direction Finding Algorithm under Spatial Angle Coupling

作　　者：秦万治 王秀君[1] QIN Wanzhi;WANG Xiujun(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第二十九研究所,成都610036

出　　处：《电子信息对抗技术》2023年第2期21-27,共7页Electronic Information Warfare Technology

摘　　要：对于二维干涉仪系统,信号空间入射情况下,因存在角度耦合,若直接将基线相位代入一般论文提及的简化干涉仪测向公式进行角度反解,其输出结果与对应维度的真实角度之间存在一个与入射角相关的理论偏差。首先通过建立空间信号入射模型,给出由基线相位和天线位置参量直接描述的二维干涉仪测向公式。然后针对一个典型L型正交阵,导出其使用一维干涉仪公式进行测向时的输出及误差特性。最后通过数值仿真,对测向公式及误差特性进行了全面验证。仿真结果表明,采用简化干涉仪公式进行角度反解,其输出值偏差随着信号入射角增加而增加,大角度条件下,会对次级系统的使用带来不利影响,需使用本文给出的公式进行角度反解。Because of angle coupling, a two-dimensional interferometer may have a principle error between calculated and real-inputting angle under a spatial signal inputting condition, when using the signal phase of base line directly with simple direction-finding(DF) formula.The error has a relationship to the original inputting angle of signal.A spatial signal inputting modeling and a common DF formula to a two-dimensional interferometer descripted by signal phase and antenna position is given.For a typical L-type crossed interferometer, an output and error character of DF is studied.Mathematic simulates show that, the inputting angle has a positive influence to the calculated angle error using a simple formulate.This error may take a bad effect on a sub-system.Using the DF formula given is suggested.

关 键 词：空间信号 二维干涉仪 测向 角度耦合 信号相位 基线 

分 类 号：TN961[电子电信—信号与信息处理]