信号处理2025，Vol.41Issue(4)：622-637,16.DOI:10.12466/xhcl.2025.04.004
存在邻近干扰源的GNSS干扰影响空间范围分析
Spatial Boundary Analysis of GNSS Interference with Adjacent Interference Sources
摘要
Abstract
The Global Navigation Satellite System(GNSS)has been widely used over the past few decades.However,various new types of radio interference sources have emerged,affecting the robustness of GNSS application systems.GNSS plays an increasingly important role in civil aviation operations.Research on localizing interference sources affect-ing GNSS signals used by civil aviation aircraft has been conducted both domestically and internationally.Existing stud-ies often assume that only a single interference source exists within the analysis space.In reality,there are instances where multiple GNSS interference sources exist near an interference source that disrupts civil aviation GNSS signals.Analyzing the spatial boundaries affected by these interference sources is crucial for guiding the localization and effec-tive elimination of interference.In this paper,we address the influence of adjacent GNSS interference sources on the in-terference spatial range of a primary GNSS interference source under various parameters.We propose a method to ana-lyze the differences in interference spatial ranges caused by nearby interference sources and systematically analyze the variations in these ranges.A significant difficulty in this analysis is that the interference spatial range is influenced by nu-merous factors,some of which are interrelated.Firstly,we model the received interference signal power of an airborne GNSS receiver at a specific position,calculating the received power in different spatial positions both with and without the presence of an adjacent interference source.Secondly,we analyze the influencing factors on the interference spatial range and their specific impacts.Finally,we introduce two quantitative indices based on the modified Hausdorff dis-tance between the curves:the mean value of boundary difference and the standard deviation of boundary difference.These indices are used to quantitatively evaluate the differences in interference spatial range under varying conditions,with or without the presence of adjacent interference sources.Through quantitative evaluation,we identify scenarios where the presence of adjacent interference sources minimally impacts the interference spatial range and where localiza-tion results derived from models that assume a single interference source may incur little bias.Conversely,we also deter-mine situations where adjacent interference sources significantly influence the interference spatial range,potentially leading to considerable errors in localization results based on single interference source assumptions.Experimental re-sults show that when the antenna pattern of the interference source is established,the power ratio of the adjacent interfer-ence source to the main source,the power level of the main interference source,the distance between the sources,and the analysis height layer all affect the interference spatial range.Our analysis provides criteria for lesser boundary differ-ences in the interference spatial range with and without adjacent interference sources surrounding the primary interfer-ence source,utilizing the mean and standard deviation of boundary differences.The findings regarding the characteris-tics of the interference spatial range under various conditions and instances of lesser boundary differences can assist in ef-fectively localizing and eliminating interference sources in scenarios where multiple interference sources are present.关键词
全球卫星导航系统/GNSS干扰/干扰范围分析/干扰功率分析/改进豪斯多夫距离Key words
Global Navigation Satellite System/GNSS interference/interference area analysis/interference power analysis/modified Hausdorff distance分类
信息技术与安全科学引用本文复制引用
王晓亮,刘雨晖,吴仁彪..存在邻近干扰源的GNSS干扰影响空间范围分析[J].信号处理,2025,41(4):622-637,16.基金项目
国家自然科学基金委员会-中国民用航空局民航联合研究基金项目(U2133204)The National Natural Science Foundation of China(U2133204) （U2133204）
