光通信研究Issue(3)：99-105,7.DOI:10.13756/j.gtxyj.2024.230049
基于多波束/TDOA技术的双星干扰源定位
Dual-satellite Interference Source Localization based on Multi-Beam/TDOA Technology
摘要
Abstract
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 position-ing model and the positioning equations in parallel.At the same time,based on Geometric Dilution of Precision(GDOP),the po-sitioning error of the positioning model is analyzed from four aspects:receiving gain error,beam pointing error,arrival time differ-ence 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-satel-lite 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-satellite multi-beam positioning.关键词
双星定位技术/干扰源定位/多波束天线/到达时间差Key words
dual-satellite localization technology/interference location/multiple beam antenna/time difference of arrival分类
信息技术与安全科学引用本文复制引用
葛明昊,赵来定,张更新..基于多波束/TDOA技术的双星干扰源定位[J].光通信研究,2024,(3):99-105,7.基金项目
国家自然科学基金资助项目(91738201) （91738201）
