摘要
单星多波束干扰源定位方法需要在3个以上的同频波束都能接收到干扰源信号的情况下才能实现定位。由于同频波束的数量有限以及干扰源位置的随机性,往往会出现能接收到干扰源信号的同频波束少于3个,或接收增益过低影响定位精度的情况。【目的】针对只有两个可用波束的定位问题以及进一步提高干扰源的定位精度,提出了通过邻星与主星建立基于多波束天线与到达时间差(TDOA)技术的双星联合定位模型。【方法】通过建立双星联合定位模型,并联立出定位方程组证明了该模型的可行性。同时,基于定位几何稀疏精度因子(GDOP)对定位模型的接收增益误差、波束指向误差、到达时间差误差以及位置预测误差4个方面进行了定位误差分析,并使用Matlab进行仿真对比。【结果】仿真实验表明,基于多波束天线与TDOA技术的双星联合定位方法的定位精度明显优于传统的单星多波束定位方法。【结论】基于多波束天线与TDOA技术的双星联合定位方法利用了TDOA对定位精度影响较小的优势,使其代替部分波束参与到卫星定位中,不仅减少了对定位波束数量的需求,而且减少了测量增益的误差与波束指向的误差,大大提高了定位的精度并提升了可靠性,较单星多波束定位更具优势。
The single⁃satellite multi⁃beam interference source localization method requires more than three co⁃frequency beams to receive the interference source signal to achieve positioning.Due to the limited number of co⁃frequency beams and the randomness of the location of the interference source,it is usually that the co⁃frequency beams can receive the interference source signal less than three,or low receiving gain,which may affect the positioning accuracy.【Objective】In order to solve the problem of position⁃ing with only two available beams and further improve the positioning accuracy of interference sources,a dual⁃satellite joint posi⁃tioning model based on multi⁃beam antenna and Time Difference of Arrival(TDOA)technology is proposed through adjacent stars and main stars.【Methods】In this paper,the feasibility of the model is proved by establishing the dual⁃satellite joint positioning model and the positioning equations in parallel.At the same time,based on Geometric Dilution of Precision(GDOP),the positioning error of the positioning model is analyzed from four aspects:receiving gain error,beam pointing error,arrival time difference error and position prediction error.【Results】The simulation results show that the positioning accuracy of the dual⁃satellite joint positioning method based on multi⁃beam antenna and TDOA technology is obviously better than the traditional single⁃satellite multi⁃beam positioning method.【Conclusion】The dual⁃satellite joint positioning method based on multi⁃beam antenna and TDOA technology makes use of the advantage that TDOA has less influence on positioning accuracy.Therefore,it replaces part of the beam to participate in satellite positioning,which not only reduces the demand for the number of positioning beams,but also reduces the error of measurement gain and the error of beam pointing with improved positioning accuracy and the reliability.The simulation results indicate that the proposed method is a better positioning method than single�
作者
葛明昊
赵来定
张更新
GE Minghao;ZHAO Laiding;ZHANG Gengxin(College of Telecommunications&Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;National Local Joint Engineering Research Center for Communication and Network Technology,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)
出处
《光通信研究》
北大核心
2024年第3期99-105,共7页
Study on Optical Communications
基金
国家自然科学基金资助项目(91738201)。
关键词
双星定位技术
干扰源定位
多波束天线
到达时间差
dual⁃satellite localization technology
interference location
multiple beam antenna
time difference of arrival
