摘要
针对旋转干涉仪测向定位系统存在相位模糊的问题,提出了一种基于最大后验概率的单站无源定位算法。该算法以旋转长基线干涉仪输出的模糊相位差为基本定位信息,无需解模糊即可实现对辐射源的精确定位。仿真计算表明该算法具有定位精度高、速度快的优点;并分析了影响定位精度的因素,计算了算法定位误差的几何分布。结论表明通过增加基线长度、提高基线波长比能较大提高定位性能;并且定位性能与目标和定位站的距离有关。
Aiming at the problem that phase ambiguity exists in rotating interferometer localization system, a passive localization algorithm based on the posterior probability maximization principle is proposed. The localization algorithm based on the ambiguous phase differences measured by rotating long baseline interferometer and the algorithm could achieve precise localization without resolving phase ambiguity. Simulation results show that the algo- rithm has high localization precision and speed advantages, the factors affecting localization performance is analyzed and the GDOP（ Geometrical Dilution of Precision） of the algorithm is calculated. Conclusions show that by increas- ing the baseline length or increasing baseline wavelength ratio can greatly improve the localization performance, and the localization performance is related with the distance between the target and the localization station.
出处
《科学技术与工程》
北大核心
2013年第36期10840-10846,共7页
Science Technology and Engineering
关键词
定位性能
后验概率
旋转长基线干涉仪
localization performance posterior probability rotating long-baseline interferometer10846
