| 基于多种方位角计算方法的超短波AOA定位比较 |
| |
| 引用本文： | 马方立,徐扬,徐鹏.基于多种方位角计算方法的超短波AOA定位比较[J].西南交通大学学报,2021,56(4):713-719. |
| |
| 作者姓名： | 马方立 徐扬 徐鹏 |
| |
| 基金项目： | 国家自然科学基金（61673320）；中央高校基本科研业务费专项资金（2682019ZT16）；四川省教育厅科研基金（No.18ZB0589） |
| |
| 摘 要： | 考虑到方位角计算是AOA （angle of arrival）定位的基础之一，首先，提出了以大地坐标计算方位角的球面近似法和正轴圆柱投影-平面法；进而，建立了球面精确AOA定位方程、球面近似AOA定位方程和正轴圆柱投影-平面AOA定位方程；最后，采用无约束非线性规划方法建立了基于大地坐标的分别与上述方程相对应的3个最优化AOA定位模型，并以网格逐点搜索求解法进行了模型验证. 验证结果的分析表明:在不考虑测向误差时，球面精确AOA定位模型的精度最高，且与纬度无关，但其定位运算时间最长；球面近似AOA定位模型和正轴圆柱投影-平面AOA定位模型的精度均较高，后者的定位误差略大于前者，定位运算时间也长于前者；要提高AOA定位网的定位精度，既可提高各站点的测向精度，也可增加测向站点数，并应综合考虑定位时效性要求和精度要求选择合适的AOA定位模型.
|
| 关 键 词： | 无源定位 AOA定位 方位角计算 最优化模型 大地坐标 |
| 收稿时间： | 2020-01-10 |
Comparison of AOA Localization in Ultrashort Wave under Various Azimuth Calculation Methods |
| |
| MA Fangli,XU Yang,XU Peng.Comparison of AOA Localization in Ultrashort Wave under Various Azimuth Calculation Methods[J].Journal of Southwest Jiaotong University,2021,56(4):713-719. |
| |
| Authors: | MA Fangli XU Yang XU Peng |
| |
| Abstract: | Given that azimuth calculation is fundamental to angle-of-arrival (AOA) localization, the spherical approximation method and normal cylindrical projection-plane method for azimuth calculation on geodetic coordinates are proposed firstly. Furthermore, the AOA localization equations based on spherical accuracy calculation, spherical approximation calculation, and normal cylindrical projection-rectangle are established respectively. Finally, the unconstrained nonlinear programming method is used to establish the three optimization AOA localization models on geodetic coordinates, which correspond to the above equations respectively, and the models are verified by the point-by-point grid search method. The numerical results show without considering the direction-finding error, the spherical accuracy AOA localization model has the highest precision, which is independent of latitude, but its positioning operation time is the longest. As for the spherical approximation AOA localization model and the normal cylindrical projection-rectangle AOA localization model, both have a high precision, the positioning error of the latter is slightly higher than that of the former, and its positioning operation time is also longer than that of the former. The positioning accuracy of AOA localization network can be improved by increasing either the direction finding accuracy of each site or the number of direction finding sites. The appropriate AOA localization model is selected according to the overall positioning requirements of the timeliness and precision. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《西南交通大学学报》浏览原始摘要信息 |
|
点击此处可从《西南交通大学学报》下载全文 |
|
