旋转长基线干涉仪测向方法及性能分析

摘要

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 .%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 。