基于到达时差测向法的目标角度测量技术研究

Research on target angle measurement based on TDOA detection finding

介绍了单基线到达时间差测向的基本原理,根据原理推导出单基线时间差测向技术的相关公式,根据公式分析了时间差测向系统相位误差产生的原因,从测向原理出发阐述了基线长度等因素对测向精度的影响,并且比较了多种测向方法。介绍了短基线时间差测向方法的优点。由于在地面应用时,短基线时差测向设备的基线长度基本不受限制,测向精度高,因而对目标的定位精度也能达到较高水平。与干涉仪方法进行了比较,为后续测试定位无人机的实验提供了理论基础。

The basic principle of single-baseline time difference of arrival （TDOA）detection finding is introduced in this paper. The related formulas are deduced, according to which the reasons for the system phase error are analyzed. From the point of view of direction finding principle, the factors impacting on accuracy, such as baseline length, are expounded, and various direction finding methods are compared with each other. The advantages of short-baseline TDOA direction finding method is introduced. With the short baseline TDOA detection finding in the ground applications, the baseline lengths are not restricted and the direction finding precisions are high, so the target localization can get high accuracy. Comparison with the interferometer method is completed too. The research provides fundamental basis for subsequent experiments of unmanned aerial vehicle （UAV） positioning