Multipath interference detection method for vector receivers based on joint multi-channel SQM metrics
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摘要: 矢量接收机利用各跟踪通道间信息共享达到通道间相互辅助的作用，因此相对于传统的标量接收机能在复杂环境下提供更好的性能. 然而在城市峡谷等复杂环境下，多径传输会严重限制矢量接收机的性能，若能及时发现多径并加以处理则能消除多径干扰的影响. 本文从多径对矢量接收机的影响机理出发，研究基于信号质量监测(SQM)的多径检测问题. 在分析现有的针对标量接收机信号SQM指标的基础上，结合矢量接收机通道耦合的特点，提出一种联合多通道SQM指标的矢量接收机多径检测方法. 最后，通过仿真实验验证了所提方法能够有效地检测与直达信号幅度比小于0.5、相对码延时在0.3~0.6码片的多径干扰.
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关键词:
- 全球导航卫星系统(GNSS) /
- 多径干扰 /
- 矢量跟踪 /
- 信号质量监测 /
- 多通道联合检测
Abstract: Vector receivers provide better performance in complex environments than traditional scalar receivers by sharing information between tracking channels to assist each other. However, multipath interference can severely limit the performance of vector receivers in complex environments such as urban canyons, and the effects of multipath can be eliminated if it is detected and dealt with in a timely manner. This paper researches multipath detection based on signal quality monitoring (SQM) from the perspective of the mechanism of multipath effects on vector receivers. Firstly, this paper proposes a multipath detection method for vector receivers with joint multi-channel SQM metrics, based on the analysis of existing SQM metrics for scalar receiver signals, combined with the characteristics of vector receiver channel coupling. Finally, this paper verifis through simulation experiments that the proposed method can effectively detect multipath with amplitude ratio less than 0.5 and the relative code delay in the range of 0.3–0.6 chips. -
表 1 常用的SQM指标
接收机类型 指标名称 指标计算表达式 均值 标量跟踪 Delta[3] $\displaystyle\frac{ { {I_{\rm{E}}} - {I_{\rm{L}}} } }{ { {I_{\rm{P}}} } }$ 0 Ratio[3] $\displaystyle\frac{ { {I_{\rm{E}}} + {I_{\rm{L}}} } }{ { {I_{\rm{P}}} } }$ 1.9 Double Delta[6] $\displaystyle\frac{ {({I_{ {{\rm{E}}_1} } } - {I_{ {{\rm{L}}_1} } }) - ({I_{ {{\rm{E}}_2} } } - {I_{ {{\rm{L}}_2} } })} }{ { {I_{\rm{P}}} } }$ 0 ELP[8] ${\arctan }\left( {\displaystyle\frac{ { {Q_{\rm{E} } } } }{ { {I_{\rm{E} } } } } } \right) - {\arctan }\left( {\displaystyle\frac{ { {Q_{\rm{L} } } } }{ { {I_{\rm{L} } } } } } \right)$ 0 Slope[15] $\displaystyle\frac{ {2 \cdot ({I_{ {{\rm{L}}_1} } } - {I_{ {{\rm{L}}_2} } })} }{ { {I_{\rm{P}}}({d_1} - {d_2})} }$ −1 矢量跟踪 文献[16] $\left\{ \begin{gathered} \frac{ { {I_{\rm{P}}} - {I_{\rm{L}}} } }{ { {I_{\rm{E}}} + {I_{\rm{L}}} } }{\text{ } }\left| { {I_{\rm{E}}} } \right| \geqslant \left| { {I_{\rm{L}}} } \right| \\ \frac{ { {I_{\rm{P}}} - {I_{\rm{E}}} } }{ { {I_{\rm{E}}} + {I_{\rm{L}}} } }{\text{ } }\left| { {I_{\rm{E}}} } \right| < \left| { {I_{\rm{L}}} } \right| \\ \end{gathered} \right.$ 0.5 
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[1] 谢钢. GPS原理与接收机设计[M]. 北京: 电子工业出版社, 2009. [2] PIRSIAVASH A, BROUMANDAN A, LACHAPELLE G. Characterization of signal quality monitoring techniques for multipath detection in GNSS applications[J]. Sensors, 2017, 17(7): 1579. DOI: 10.3390/s17071579 [3] IRSIGLER M. Multipath propagation, mitigation and monitoring in the light of Galileo and the modernized GPS[D]. Munich: Bundeswehr University, 2008. [4] FANTINO M, MOLINO A, MULASSANO P, et al. Signal quality monitoring: correlation mask based on ratio test metrics for multipath detection [C]// Proceedings of IGNSS Symposium 2009. [5] FRANCO-PATINO D M, SECO-GRANADOS G, DOVIS F. Signal quality checks for multipath detection in GNSS[C]// International Conference on Localization and GNSS (ICL-GNSS), 2013. [6] PIRSIAVASH A, BROUMANDAN A, LACHAPELLE G. Performance evaluation of signal quality monitoring techniques for GNSS multipath detection and mitigation[C]//International Technical Symposium on Navigation and Timing (ITSNT), 2017. [7] MUBARAK O, DEMPSTER A G. Performance comparison of ELP and DELP for multipath detection[C]// Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), 2009: 2276-2283. [8] MUBARAK O M, DEMPSTER A G. Analysis of early late phase in single-and dual-frequency GPS receivers for multipath detection[J]. GPS solutions, 2010, 14(1): 381-388. DOI: 10.1007/s10291-010-0162-z [9] AMANI E, DE BOER J R, VIGNEAU W, et al. GPS multipath induced errors for the vector tracking loop: insight into multipath detection[C]//European Navigation Conference (ENC 2016). 2016. [10] AMANI E, DJOUANI K, DE BOER J R, et al. Correlator-based multipath detection technique for a global positioning system/GNSS receiver[J]. IET radar, sonar and navigation, 2018, 12(7): 783-793. DOI: 10.1049/iet-rsn.2017.0379 [11] LUO Y, WANG Y Q, WU S L, et al. Multipath effects on vector tracking algorithm for GNSS signal[J]. Science china information sciences, 2014, 10(57): 1-13. DOI: 10.1007/s11432-014-5153-1 [12] 张欣然, 李洪, 杨春, 等. 欺骗干扰对GNSS矢量跟踪环路的影响[J]. 清华大学学报(自然科学版), 2022, 62(1): 163-171. [13] ZHAO S H, LU M Q, FENG Z M. Implementation and performance assessment of a vector tracking method based on a software GPS receiver[J]. Journal of navigation, 2011, 64(S1): S151-S161. DOI: 10.1017/S0373463311000440 [14] PIRSIAVASH A, BROUMANDAN A, LACHAPELLE G. How effective are signal quality monitoring techniques for GNSS multipath detection[J/OL]. (2018-01-01)[2023-01-20]. Inside GNSS, 2018, 13(1): 40-47. [15] KHAN A M, IQBAL N, KHAN A A, et al. Detection of intermediate spoofing attack on global GNSS receiver through slope based metrics[J]. Journal of navigation, 2020, 73(5): 1052-1068. DOI: 10.1017/S0373463320000168 [16] ZHANG X R, LI H, YANG C, et al. Signal quality monitoring spoofing identification methods for GNSS vector tracking structure[C]//Proceedings of the 2021 International Technical Meeting of The Institute of Navigation, 2021. [17] SUN C, CHEONG J W, DEMPSTER A G, et al. GNSS spoofing detection by means of signal quality monitoring (SQM) metric combinations[J]. IEEE access, 2018, 99(6): 1-1. DOI: 10.1109/ACCESS.2018.2875948 [18] WIPER M P, GIRON F J, PEWSEY A. Objective bayesian inference for the half-normal and half-t distributions[J]. Communications in statistics—theory and methods, 2008, 37(20): 3165-3185. DOI: 10.1080/03610920802105184 [19] MANFREDINI E G, DOVIS F, MOTELLA B. Validation of a signal quality monitoring technique over a set of spoofed scenarios[C]//2014 7th ESA Workshop on Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC), 2014. -
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