电大山区地物环境中电波传播的电磁计算

doi:10.19665/j.issn1001-2400.20230210

Abstract

Abstract:

In emerging industries such as unmanned aerial vehicles and drones,the signal coverage requirements are high,not only in the city,but in the inaccessible mountains,deserts,and forests also wireless signal coverage is needed to truly complete remote control.These areas need to consider the impact of terrain changes on electromagnetic transmission.The Uniform Geometrical Theory of Diffraction method in Computational Electromagnetic is an effective method to analyze electromagnetic problems in electrically large environments and this paper uses the method of computational electromagnetics to study the propagation of electromagnetic waves in mountainous environments.A new method of constructing an irregular terrain model is presented.The available terrain data can be generated by the cubic surface algorithm,and the irregular terrain is spliced by multiple cubic surfaces.The accuracy of the model data is verified by the mean root mean square error.Based on the topographic data,a parallel 3D geometric optical algorithm is completed,and the distribution of the regional electromagnetic field is simulated.The actual mountain terrain environment is selected for field measurement,and the comparison trend between the measurement results and the simulation results is consistent,which verifies the effectiveness of the method in the analysis of electromagnetic wave propagation in the irregular terrain.Considering the scale of environmental electromagnetic computation,a parallel strategy is established,and the parallel efficiency of 100 cores test can be kept to be above 80%.

Key words: electrically large mountainous terrain environment, radio wave propagation, digital elevation model, fractal modeling, geometric optics, parallel computing

CLC Number:

TN82

WANG Nan, LIU Junzhi, CHEN Guiqi, ZHAO Yanan, ZHANG Yu. Electromagnetic calculation of radio wave propagation in electrically large mountainous terrain environment[J].Journal of Xidian University, 2024, 51(1): 21-28.

Figures/Tables 8

References 25

[1]	杨超, 郭立新, 李宏强, 等. 大气波导中电波传播特性的研究[J]. 西安电子科技大学学报, 2009, 36(6):1097-1102.
	YANG Chao, GUO Lixin, LI Hongqiang, et al. Study the Propagation Characteristic of Radio Wave in Atmospheric Duct[J]. Journal of Xidian University, 2009, 36(6):1097-1102.
[2]	李伟, 郑航, 钱肇钧, 等. 基于信道测量的3-6 GHz城市环境传播特性研究[J]. 南京邮电大学学报(自然科学版), 2016, 36(4):28-34.
	LI Wei, ZHENG Hang, QIAN Zhaojun, et al. Measurement-Based Urban Propagation Characterization at 3-6 GHz[J]. Journal of Nanjing University of Posts and Telecommunications(Natural Science Edition), 2016, 36(4):28-34.
[3]	ROH W, SEOL J, PARK J, et al. Millimeter-Wave Beamforming as an Enabling Technology for 5G Cellular Communications:Theoretical Feasibility and Prototype Results[J]. IEEE Communications Magazine, 2014, 52(2):106-113.
[4]	KVICERA M, KORINEK T, KVICERA V, et al. Short-Term Terrain Diffraction Measurements From L- to Q-Band:Results and Analysis[J]. IEEE Transactions on Antennas and Propagation, 2014, 62(7):3693-3701. doi: 10.1109/TAP.2014.2316283
[5]	GIOVANELI C L. An Analysis of Simplified Solutions for Multiple Knife-Edge Diffraction[J]. IEEE Transactions on Antennas and Propagation, 1984, 32(3):297-301. doi: 10.1109/TAP.1984.1143299
[6]	ORAIZI H, HOSSEINZADEH S. Radio-Wave-Propagation Modeling in the Presence of Multiple Knife Edges by the Bidirectional Parabolic-Equation Method[J]. IEEE Transactions on Vehicular Technology, 2007, 56(3):1033-1040. doi: 10.1109/TVT.2007.895496
[7]	APAYDIN G, SEVG L. A Novel Split-Step Parabolic-Equation Package for Surface-Wave Propagation Prediction Along Multiple Mixed Irregular-Terrain Paths[J]. IEEE Antennas and Propagation Magazine, 2010, 52(4):90-97.
[8]	翟畅, 林中朝, 赵勋旺, 等. 一种使用八叉树的半空间MLFMA区域分解算法[J]. 西安电子科技大学学报, 2021, 48(6):144-150.
	ZHAI Chang, LIN Zhongchao, ZHAO Xunwang, et al. Algorithm for Half-Space MLFMA Domain Decomposition Utilizing an Octree[J]. Journal of Xidian University, 2021, 48(6):144-150.
[9]	赵斯晗, 魏兵, 何欣波. 局部特征值解的无条件稳定FDTD高效实施方案[J]. 西安电子科技大学学报, 2022, 49(1):188-193.
	ZHAO Sihan, WEI Bing, HE Xinbo. Efficient Implementation of Unconditionally Stable FDTD with the Local Eigenvalue Solution[J]. Journal of Xidian University, 2022, 49(1):188-193.
[10]	孙宪钢, 魏兵, 石磊. 有耗对称介质层反射系数的快速计算[J]. 西安电子科技大学学报, 2021, 48(6):138-143.
	SUN Xiangang, WEI Bing, SHI Lei. Fast Calculation of the Reflection Coefficient of the Lossy Symmetrical Dielectric Layer[J]. Journal of Xidian University, 2021, 48(6):138-143.
[11]	HUANG L, WU X P, LI Z H, et al. A Parallel FDTD/ADI-PE Method for Ultralarge-Scale Propagation Modeling of ILS Signal Analysis[J]. IEEE Antennas and Wireless Propagation Letters, 2020, 19(12):2245-2249. doi: 10.1109/LAWP.7727
[12]	FENG J, ZHOU L, XU X M. A Hybrid TDPE/FDTD Method for Site-Specific Modeling of O2I Radio Wave Propagation[J] IEEE Antennas and Wireless Propagation Letters, 2018, 17(9):1652-1655. doi: 10.1109/LAWP.7727
[13]	APAYDIN G, OZGUN O, KUZUOGLU M, et al. A Novel Two-Way Finite-Element Parabolic Equation Groundwave Propagation Tool:Tests with Canonical Structures and Calibration[J]. IEEE Transactions on Geoscience and Remote Sensing, 2021, 49(8):2887-2899. doi: 10.1109/TGRS.2011.2114889
[14]	PATHAK P H, GARLUCCIO G, ALBANI M. The Uniform Geometrical Theory of Diffraction and Some of Its Applications[J], IEEE Antennas and Propagation magazine, 2013, 55(4):41-69.
[15]	陆金文, 闫华, 殷红成, 等. 用于三维散射中心SBR建模的边缘绕射修正[J]. 西安电子科技大学学报, 2021, 48(2):117-124.
	LU Jinwen, YAN Hua, YIN Hongcheng, et al. Edge Diffraction Correction for 3D Scattering Center Modeling Based on the Shooting and Bouncing Ray Technique[J]. Journal of Xidian University, 2021, 48(2):117-124.
[16]	ERRICOLO D, ELIA G D, USLENGHI P. Measurements on Scaled Models of Urban Environments and Comparisons with Ray-Tracing Propagation Simulation[J]. IEEE Transactions on Antennas and Propagation, 2002, 50(5):727-735. doi: 10.1109/TAP.2002.1011240
[17]	赵延安, 侯鹏, 王大鹏, 等. 2.5 GHz城市环境电磁态势的计算与补偿[J]. 微波学报, 2020, 36(2):94-97.
	ZHAO Yan’an, HOU Peng, WANG Dapeng, et al. Calculation and Compensation in Urban Environment Electromagnetic Situation at 2.5 GHz[J]. Journal of Microwaves, 2020, 36(2):94-97.
[18]	ZHAN P, SONG C, LUO S, et al. Lake Level Reconstructed from DEM-Based Virtual Station:Comparison of Multisource DEMs with Laser Altimetry and UAV-LiDAR Measurements[J], IEEE Geoscience and Remote Sensing Letters, 2022, 19:1-5.
[19]	刘艳阳, 李真芳, 杨娟娟, 等. 分布式卫星InSAR目标定位近似闭式解[J]. 西安电子科技大学学报, 2012, 39(4):87-93.
	LIU Yanyang, LI Zhenfang, YANG Juanjuan, et al. Quasi-Closed-Form Solution for Distributed Satellites InSAR Geolocation[J]. Journal of Xidian University, 2012, 39(4):87-93.
[20]	YU Y, SAATCHI S, HEALTH L S, et al. Regional Distribution of Forest Height and Biomass from Multisensor Data Fusion[J] Journal of Geophysical Research Biogeosciences, 2010, 115(G2):1-16.
[21]	ZHANG Y, YAN G, BAI Y. Sensitivity of Topographic Correction to the DEM Spatial Scale[J]. IEEE Geoscience and Remote Sensing Letters, 2015, 12(1):53-57. doi: 10.1109/LGRS.2014.2326000
[22]	SCHETTINO D N, MOREIRA F J, BORGES K L, et al. Novel Heuristic UTD Coefficients for the Characterization of Radio Channels[J]. IEEE Transactions on Magnetics, 2007, 43(4):1301-1304. doi: 10.1109/TMAG.2006.890975
[23]	张玉, 王楠, 梁昌洪. PC集群MPI并行矩量法分析复杂平台多天线特性[J]. 电子学报, 2006, 34(3):478-482.
	ZHANG Yu, WANG Nan, LIANG Changhong. Study of MPI Based Parallel MoM on PC Clusters for Multiple Antennas Mounted on Complex Platforms[J]. Acta Electronica Sinica, 2006, 34(3):478-482.
[24]	谭雯, 甘新标, 白皓, 等. 面向超级计算机系统的大规模图遍历优化[J]. 西安电子科技大学学报, 2021, 48(6):84-95.
	TAN Wen, GAN Xinbiao, BAI Hao, et al. Optimization of Large-Scale Graph Traversal for Supercomputers[J]. Journal of Xidian University, 2021, 48(6):84-95.
[25]	李岷轩, 江树刚, 吴庆恺, 等. 非结构网格瞬态电磁场计算中的高效通信方法[J]. 西安电子科技大学学报, 2022, 49(4):16-23.
	LI Minxuan, JIANG Shugang, WU Qingkai, et al. Efficient Communication Method for Transient Electromagnetic Field Computation on Unstructured Grids[J]. Journal of Xidian University, 2022, 49(4):16-23.

子区域数目	平均均方根误差/m	均方根误差最大值/m	均方根误差最小值/m
869	1.772 6	10.846 0	0.512 4
4 536	0.384 0	7.451 2	0.133 6

核心数	时间/s	计算效率/%
1	4 500 497.60	100.0
32	161 783.00	87.0
64	82 547.80	85.2
128	43 443.98	80.9
256	24 571.02	71.5

Electromagnetic calculation of radio wave propagation in electrically large mountainous terrain environment

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 8

References 25

Related Articles 10

Metrics

Comments

Recommended 0

[1]	ZHAO Boran;ZHANG Li;SHI Guangming;HUANG Rong;XU Xinran. Design of the programmable neural network processor based on the transport triggered architecture [J]. Journal of Xidian University, 2018, 45(4): 92-98.
[2]	REN Jilin;CHE Shuling;ZHENG Zheng. Decoding of regular LDPC codes accelerated by the GPU [J]. Journal of Xidian University, 2017, 44(3): 25-30.
[3]	ZHOU Hang;CAI Zhiming;WANG Ximin. Implementation and optimization of the wideband matched filter on the GPU [J]. J4, 2015, 42(3): 135-140+191.
[4]	BAI Bing;NIU Zhongqi. High performance CPML acceleration scheme with GPU for FDTD [J]. J4, 2015, 42(1): 194-199+212.
[5]	QIN Hua;ZHOU Mo;CHA Hao;ZUO Wei. Research on multi-GPU parallel technology in software radar signal processing [J]. J4, 2013, 40(3): 145-151.
[6]	LIU Yanyang;LI Zhenfang;YANG Juanjuan;BAO Zheng. Quasi-closed-form solution for distributed satellites InSAR geolocation [J]. J4, 2012, 39(4): 87-93.
[7]	JIN Guowang;ZHANG Hongmin;XU Qing;GONG Zhihui. Phase unwrapping algorithm with CRT for multi-band InSAR [J]. J4, 2011, 38(6): 97-102.
[8]	GUO Jiao;LI Zhenfang;BAO Zheng. Coregistration of multiple-pass interferograms of a single-baseline InSAR system based on phase gradients [J]. J4, 2011, 38(1): 110-116.
[9]	SUN Hong-yuan1;2;XIE Wei-xin2;LU Ke-zhong2;YANG Xun1. A new genetic algorithm for horizontal overcastting [J]. J4, 2007, 34(5): 758-762.
[10]	LIU Nan-yan;ZHAI Ling. Study of the construction and application of the DEM [J]. J4, 2006, 33(3): 500-503.