旋转长基线干涉仪测向方法及性能分析  

A Direction Finding Method and Analysis Based on the Rotated Long Baseline Interferometer

作　　者：张敏[1] 郭福成[1] 李腾[2] 周一宇[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073 [2]海军装备研究院,北京100161

出　　处：《电子学报》2013年第12期2422-2429,共8页Acta Electronica Sinica

基　　金：国防科技重点实验室基金(No.9140C860304);国家"863"计划(No.2011AA7072043;No.2011AA7072048)

摘　　要：针对传统多通道干涉仪和阵列测向系统复杂、易受通道间幅相不一致性影响,分析了旋转长基线干涉仪(RLBI)测向的两类相位差观测模型,进而推导了无模糊测向条件,提出了一种基于多假设伪线性迭代最小二乘(MHPILS)的测向方法,并分析了测向误差克拉美-罗下限(CRLB)和均方误差(MSE).仿真结果表明该方法运算量适中,测向精度可接近CRLB.Due to the complexity and amplitude-phase inconsistencies in traditional multi-channel interferometer and array , two phase difference observation models for direction finding based on the rotated long baseline interferometer （RLBI ）is analyzed . The unambiguous direction finding conditions for the proposed models are derived .A multiple hypothesis pseudolinear iteration least square（MHPILS）algorithm is proposed .The Cramer-Rao low bound（CRLB）and mean square error （MSE）is also analyzed .The simulation results show that this method achieves moderate computation amount and can attain the CRLB .

关 键 词：测向 长基线干涉仪 相位差模糊 最小二乘 克拉美-罗下限 

分 类 号：TN971[电子电信—信号与信息处理]