非视距信号传播场强特性的分析与研究

doi:10.11959/j.issn.1000-0801.2024019

摘要/Abstract

摘要：

为探索机场通信路径中障碍物造成非视距传播产生衍射损耗，对信号场强衰减特性进行了研究。首先，基于ITU-R P.1546中不同地形环境对信号传播的影响，结合Deygout模型构建信号场强组合模型。其次，按障碍物数量分析随障碍物高度变化的接收场强传播特性。仿真结果表明，单障碍物越高，占据0.6F₁菲涅尔区越大，场强越小；双障碍物路径中，高度增加的障碍物经过由次要转为主要障碍物，直到只剩主要障碍物的过程，使场强逐渐衰减。再次，针对场强上升，分析了次要障碍物高度与0.6F₁菲涅尔区的关系。最后，调整覆盖场强最小阈值，确定接收设备是否被障碍物遮挡，从而导致信号被屏蔽。上述研究结果可为未来模拟机场各场景下障碍物分布，预测接收机是否因障碍物受干扰或影响场强覆盖范围提供参考依据。

关键词: 非视距传播, 障碍物, 菲涅尔区, 衍射损耗, 拟合场强

Abstract:

In order to explore the diffraction loss caused by non-line-of-sight (NLOS ) propagation caused by obstacles in the airport communication path, the attenuation characteristics of signal field were studied.Firstly, based on the influence of different terrain environments on signal propagation in ITU-R P.1546, a combined signal field strength model was constructed with Deygout model.Secondly, according to the number of obstacles, the propagation characteristics of the received field strength varying with the height of obstacles were analyzed.The simulation results show that the higher the single obstacle is, the larger the Fresnel zone occupying 0.6F₁ is and the smaller the field strength is.In the dual obstacle path, the obstacle with increased height goes through the process of changing from secondary to main obstacle until only the main obstacle is left, so that the field strength gradually decreases.Thirdly, the relationship between secondary obstacle height and 0.6F₁ Fresnel zone was analyzed for field strength rise.Finally, the minimum threshold of the covered field strength was adjusted to determine whether the receiving device was blocked by obstacles and the signal was shielded.The above research results can provide a reference for simulating the distribution of obstacles in various airport scenarios in the future, and predicting whether the receiver is interfered by obstacles or affects the field intensity coverage.

Key words: non-line-of-sight propagation, obstacles, Fresnel zone, diffraction loss, fitting field strength

中图分类号:

TN925

宫峰勋, 张英. 非视距信号传播场强特性的分析与研究[J]. 电信科学, 2024, 40(2): 83-95.

Fengxun GONG, Ying ZHANG. Analysis and research on propagation field strength characteristics of non-line-of-sight signal[J]. Telecommunications Science, 2024, 40(2): 83-95.

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参考文献 19

[1]	杨丽花, 刘加欢, 任露露 ,等. 室内办公室高频段信道测量和大尺度衰落建模[J]. 北京邮电大学学报, 2022,45(1): 7-12.
	YANG L H , LIU J H , REN L L ,et al. High frequency broadband channel measurement and large scale fading modeling in indoor office scenario[J]. Journal of Beijing University of Posts and Telecommunications, 2022,45(1): 7-12.
[2]	PHILLIPS C , SICKER D , GRUNWALD D . A survey of wireless path loss prediction and coverage mapping methods[J]. IEEE Communications Surveys ＆ Tutorials, 2013,15(1): 255-270.
[3]	张文波, 曹耀钦 . 电磁环境仿真中电波传播模型研究及仿真分析[J]. 电波科学学报, 2012,27(3): 538-542,550.
	ZHANG W B , CAO Y Q . Research and simulation analysis on radio propagation model in electromagnetic environment simulation[J]. Chinese Journal of Radio Science, 2012,27(3): 538-542,550.
[4]	LONGLEY A G , RICE P L . Prediction of tropospheric radio transmission loss over irregular terrain[J]. A Computer Met-Hod. 1968.
[5]	KASAMPALIS S , LAZARIDIS P I , ZAHARIS Z D ,et al. Longley-Rice model prediction inaccuracies in the UHF and VHF TV bands in mountainous terrain[C]// Proceedings of the 2015 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting. Piscataway:IEEE Press, 2015: 1-5.
[6]	DEYGOUT J . Multiple knife-edge diffraction of microwaves[J]. IEEE Transactions on Antennas and Propagation, 1966,14(4): 480-489.
[7]	DEYGOUT J . Correction factor for multiple knife-edge diffraction[J]. IEEE Transactions on Antennas and Propagation, 1991,39(8): 1256-1258.
[8]	佐磊, 何怡刚, 李兵 ,等. 无源超高频射频识别系统路径损耗研究[J]. 物理学报, 2013,62(14): 150-157.
	ZUO L , HE Y G , LI B ,et al. Analysis and measurments of path loss effects for ultra high frequency radio-frequency identification in real environments[J]. Acta Physica Sinica, 2013,62(14): 150-157.
[9]	KASAMPALIS S , LAZARIDIS P I , ZAHARIS Z D ,et al. Comparison of Longley-Rice,ITU-R P.1546 and Hata-Davidson propagation models for DVB-T coverage prediction[C]// Proceedings of the 2014 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting. Piscataway:IEEE Press, 2014: 1-4.
[10]	ITU. Method for point-to-area predictions for terrestrial services in the frequency range 30 MHz to 3 000 MHz:ITU-R P.1546-5[S]. 2013.
[11]	OLIVEIRA R , SOUZA J , MAGNO F ,et al. Application of Parabolic Equation and Hata-Davidson propagation models for digital TV coverage prediction[C]// Proceedings of the 2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC). Piscataway:IEEE Press, 2015: 1-5.
[12]	董浩, 宋亮, 化存卿 ,等. 海上通信技术发展与研究综述[J]. 电信科学, 2022,38(5): 1-17.
	DONG H , SONG L , HUA C Q ,et al. Review on development and research of maritime communication technology[J]. Telecommunication Science, 2022,38(5): 1-17.
[13]	韩慧, 郝玉龙, 杨铖 ,等. 基于抛物方程的无人机通信场景传播特性分析[J]. 电信科学, 2022,38(8): 45-53.
	HAN H , HAO Y L , YANG C ,et al. Analysis of UAV Communication scenario Propagation characteristics based on Parabolic equation[J]. Telecommunications Science, 2022,38(8): 45-53.
[14]	全厚德, 兰田, 孙慧贤 ,等. 多子模型方法预测电波传播损耗研究[J]. 火力与指挥控制, 2018,43(9): 94-98.
	QUAN H D , LAN T , SUN H X ,et al. Research on multi-model methods in predicting radio wave propagation loss[J]. Fire Control ＆ Command Control, 2018,43(9): 94-98.
[15]	王楠, 刘俊志, 陈贵齐 ,等. 电大山区地物环境中电波传播的电磁计算[J]. 西安电子科技大学学报, 2023,50(4): 1-9.
	WANG N , LIU J Z , CHEN G Q ,et al. Electromagnetic calculation of radio wave propagation in terrain environment of Dada Mountain area[J]. Journal of Xidian University, 2023,50(4): 1-9.
[16]	冯克涛, 李晓毅, 曲晨 ,等. 基于DEM的民航地空VHF通信有效覆盖仿真研究[J]. 系统工程与电子技术, 2022,44(2): 684-695.
	FENG K T , LI X Y , QU C ,et al. Simulation research on effective coverage of civil aviation ground to air VHF communication based on DEM[J]. Systems Engineering and Electronics, 2022,44(2): 684-695.
[17]	LEE W C Y . Mobile cellular telecommunications:analog and digital systems[M]. New York: McGraw-Hill Professional, 1995: 137-139.
[18]	朱秋明, 黄攀, 陈学强 ,等. 月表环境无线电波传播分段预测模型[J]. 四川大学学报(工程科学版), 2014,46(2): 116-120.
	ZHU Q M , HUANG P , CHEN X Q ,et al. A new segment prediction model for radio propagation over lunar surface[J]. Journal of Sichuan University (Engineering Science Edition), 2014,46(2): 116-120.
[19]	汤新民, 张颖, 胡钰明 ,等. 基于网格划分的 ADS-B 地面站信号覆盖及选址分析[J]. 南京航空航天大学学报, 2022,54(6): 1114-1120.
	TANG X M , ZHANG Y , HU Y M ,et al. Analysis on signal coverage and site selection for ADS- B ground station based on grid division[J]. Journal of Nanjing University of Aeronautics ＆Astronautics, 2022,54(6): 1114-1120.

发射机-接收机	第二障碍物与上半部分0.6F₁菲涅尔区纵轴交点高度/m	第一障碍物与上半部分0.6F₁菲涅尔区纵轴交点高度/m
接收机4	78	142
接收机5	37	121
接收机6	59	132
接收机7	92	149
接收机8	68	144
接收机9	58	140