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 .
出处
《电子学报》
EI
CAS
CSCD
北大核心
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)
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
direction finding
long baseline interferometer
phase difference ambiguity
least square
Cramer-Rao lower bound
