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

作　　者：王晓亮[1] 刘雨晖 吴仁彪[1] WANG Xiaoliang;LIU Yuhui;WU Renbiao(Tianjin Key Laboratory for Advanced Signal Processing,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学天津市智能信号与图像处理重点实验室,天津300300

出　　处：《信号处理》2025年第4期622-637,共16页Journal of Signal Processing

基　　金：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)。

摘　　要：当前全球卫星导航系统(Global Navigation Satellite System,GNSS)应用广泛,近年来各种新型无线电干扰不断出现,使GNSS应用系统的稳健性受到影响。GNSS在民航飞机运行中也正在发挥越来越重要的作用,针对民航飞机GNSS信号干扰的问题,国内外已开展了利用民航飞机数据进行干扰源定位的研究,现有相关研究一般假设分析空间中仅存在单个干扰源,而在实际中发现了一些干扰民航GNSS信号的干扰源附近存在其他GNSS干扰源的案例。干扰源影响空间范围的分析对于指导干扰源定位、有效排查干扰源具有重要意义。本文针对干扰GNSS信号的主干扰源周围存在邻近干扰源的情况下,邻近干扰源对主干扰源的干扰空间范围在不同参数下的影响程度问题,给出了一种对邻近干扰源带来的干扰空间影响范围的变化的分析方法,并系统分析了存在邻近干扰源情况下干扰影响空间范围的变化情况。为克服存在邻近干扰源时干扰影响空间范围影响因素多,部分影响因素还存在一定耦合性的难题,首先在空间指定位置机载GNSS接收机接收干扰信号功率建模的基础上,分别计算主干扰源周围不存在和存在邻近干扰源这两种情况下空间中不同位置的干扰信号接收功率;其次分析存在邻近干扰源时干扰空间范围的影响因素及这些影响因素的具体影响;最后在曲线间改进豪斯多夫距离的基础上,提出边界差异均值和边界差异标准差两个定量指标,定量化评估存在邻近干扰源时与无邻近干扰源时相比不同参数下干扰空间范围的差异。通过这一定量化评估,可以获知在什么情况下存在邻近干扰源时对干扰空间范围影响小,在这些情况下使用单干扰源假设的定位分析模型不会对干扰源定位结果产生大的影响;以及在什么情况下存在邻近干扰源时会使干扰空间范围产生显著变化,在这些情况下再使用单干扰源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 affecting GNSS signals used by civil aviation aircraft has been conducted both domestically and internationally.Existing studies 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 effective elimination of interference.In this paper,we address the influence of adjacent GNSS interference sources on the interference spatial range of a primary GNSS interference source under various parameters.We propose a method to analyze 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 numerous 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 distance 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 interfere

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 

分 类 号：TN967.1[电子电信—信号与信息处理]