摘要
针对机载单站无源定位精度受限于参数测量误差的实际问题,提出一种改善相位差误差下的网格搜索无源定位方法。首先采用LMS自适应滤波算法对相位差信息进行滤波处理,然后根据定位模型利用观测的相位差建立定位方程,最后通过网格搜索法解算辐射源目标位置。该方法可以在相位差测量误差较大情况下实现对辐射源目标的精确定位。仿真实验结果表明,滤波处理后的相位差误差可以减小到0.14 rad以下,而且定位结果优于文献[17]的方法。通过分析定位误差,表明相位差误差在10°范围内,增大网格分辨率和延长观测时间可以提高定位精度,同时也进一步验证了获取高精度相位差信息的必要性。
Aimed at the practical problem that the accuracy of air airborne single station passive location is limited by the error of parameter measurement,this paper presents a grid search passive location method to improve the error of phase difference.Firstly,the phase difference information is filtered out by LMS adaptive filtering,and then the positioning equation is established by using the observed phase difference according to the positioning model.Finally,the location of the radiation source target is solved by the grid search method.The target of radiation source can be located at by the method accurately under the condition of large phase difference measurement error.The simulation results show that the phase difference error filtered can be reduced to less than 0.14rad,and the positioning result is better than that of reference[17].The positioning error is shown that within 10 degrees at the phase error,increasing the mesh resolution and extending the observation time can improve the positioning accuracy,and can verify further the necessity to obtain the accuracy,and to obtain the accurate phase difference information simultaneously.
作者
邢怀玺
吴华
陈游
XING Huaixi;WU Hua;CHEN You(Aeronautics Engineering College,Air Force Engineering University,Xi’an 710038,China)
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2019年第6期9-14,共6页
Journal of Air Force Engineering University(Natural Science Edition)
关键词
无源定位
相位差
LMS自适应滤波
网格搜索
passive location
phase difference
LMS adaptive filtering
grid search
