城市环境电磁态势计算中的并行UTD方法

doi:10.19665/j.issn1001-2400.2023.03.016

Abstract

Abstract:

Electromagnetic situation prediction in complex city environments is the basic problem in wireless communication spectrum utilization,urban system engineering planning and electromagnetic compatibility design,which is of both engineering practical value and theoretical exploration value.The uniform geometrical theory of diffraction (UTD) in computational electromagnetics is an effective method to analyze electromagnetic problems in electrically large environments,and the electromagnetic situation in urban environment can be simulated and analyzed effectively after building a parallel strategy.By introducing the analytical hexahedron model and using reflection,edge diffraction and its related ray types like double diffraction and reflection-diffraction to describe the propagation of electromagnetic waves in the non-sighted regions,an analyzing and tracing method for double edge diffraction is presented with practical examples given and the validity and accuracy verified by comparison with the results from Moment Methods and from actual measurement,respectively.In order to shorten the calculation time of the ray tracing module,to improve the calculation efficiency and to further expand the calculating scale of an engineering problem that can be applied,a parallel calculation strategy with a better scalability is designed,with which calculation tasks are distributed through the similarity of the ray types to ensure a better balance of parallel calculations.The scalability of this parallel strategy is presented by discussing the parallel efficiency and parallel speedup ratio.The engineering practicality of the parallel UTD method in this paper is shown through comparison with the actual measurement results.

Key words: uniform geometrical theory of diffraction, parallel calculation, edge diffraction, double diffraction, electromagnetic situation in city environments

CLC Number:

TN82

WANG Nan,CHEN Guiqi,ZHAO Yanan,ZHANG Yu. Parallel UTD method for calculation of electromagnetic problems in city environments[J].Journal of Xidian University, 2023, 50(3): 171-181.

Figures/Tables 22

References 33

[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]	宋铮, 张建华, 黄冶天. 天线与电波传播[M]. 西安: 西安电子科技大学出版社, 2011.
[3]	刘杉坚, 周春晖, 周世, 等. 5.8 GHz室外环境传播特性分析[J]. 吉林大学学报:信息科学版, 2008, 26(1):21-26.
	LIU Shanjian, ZHOU Chunui, ZHOU Shi, et al. Analysis of Outdoor Propagation Characteristics of 5.8 GHz[J]. Journal of Jilin University:Information Science Edition, 2008, 26(1):21-26.
[4]	赵小龙, 黄际英. 大气波导中多径信道的参数研究[J]. 西安电子科技大学学报, 2008, 35(2):314-318.
	ZHAO Xiaolong, HUANG Jiying. Research on Multi-Path Channel Parameters in the Marine Atmospheric Duct[J]. Journal of Xidian University, 2008, 35(2):314-318.
[5]	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, 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, 2016, 36(4):28-34.
[6]	YANG L Q, FAN J M, GUO L X, et al. Simulation Analysis and Experimental Study on the Echo Characteristics of High-Frequency Hybrid Sky-Surface Wave Propagation Mode[J]. IEEE Transactions on Antennas and Propagation, 2018, 66(9):4821-4831. doi: 10.1109/TAP.2018.2842254
[7]	WANG J, WANG S, YANG L, et al. Statistical Study on VHF Over-the-Horizon Propagation Characteristics from Kunming to Qingdao[C]// 13th International Symposium on Antennas,Propagation and EM Theory (ISAPE 2021).Piscataway:IEEE, 2021:1-4.
[8]	EGOROVD P, KRYUKOVSKY A S, KUTUZA B G, et al. Influence of the Earth’s Ionosphere on the Polarization Characteristics of Radio Waves in the Megahertz Range[C]// Photonics & Electromagnetics Research Symposium (PIERS 2022).Piscataway:IEEE, 2022:1108-1118.
[9]	BREMR, EIBERT T F. A Shooting and Bouncing Ray (SBR) Modeling Framework Involving Dielectrics and Perfect Conductors[J]. IEEE Transactions on Antennas and Propagation, 2015, 63(8):3599-3609. doi: 10.1109/TAP.2015.2438318
[10]	LEEJ I, SEO D W. Fast Scattered Far-Field Predictions for Super-Resolution ISAR Image Formation Using the Shooting and Bouncing Ray Technique,IEEE Access, 2022, 10:18182-18191.
[11]	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.
[12]	高军, 曹祥玉, 刘涛. 机载通信天线辐射特性分析[J]. 西安电子科技大学学报, 2008, 35(4):754-758.
	GAO Jun, CAO Xiangyu, LIU Tao. Analysis of the Radiation Characteristic of the Airborn Communication Antenna[J]. Journal of Xidian University, 2008, 35(4):754-758.
[13]	杨鑫, 魏兵. 一种射线跟踪建模的新方法[J]. 西安电子科技大学学报, 2016, 43(3) :73-77.
	YANG Xin, WEI Bing. New Modeling Method for Ray Tracing[J]. Journal of Xidian University, 2016, 43(3):73-77.
[14]	BALASUBRAMANIAN M, CAMPBELL S D, WERNER D H. A Heuristic UTD Solution for Scattering by a Thin Lossless Anisotropic Slab[J]. IEEE Transactions on Antennas and Propagation, 2020, 68(12):8009-8020. doi: 10.1109/TAP.8
[15]	TANS Y, TAN H S. UTD Propagation Model in an Urban Street Scene for Microcellular Communications[J]. IEEE Transactions on Electromagnetic Compatible, 2003, 35(4):423-428.
[16]	TANS Y, TAN H S. A Microcellular Communications Propagation Model Based on the Uniform Theory of Diffraction and Multiple Image Theory[J]. IEEE Transactions on Antennas and Propagation, 2006, 44(10):1317-1326. doi: 10.1109/8.537325
[17]	HOLMP D. A New Heuristic UTD Diffraction Coefficient for Nonperfectly Conducting Wedges[J]. IEEE Transactions on Antennas and Propagation, 2020, 48(8):1211-1219. doi: 10.1109/8.884489
[18]	RODRIGUEZJ V, MOLINA J M, JUAN L. A New Solution for the Analysis of Multiple-Building Diffraction in Urban Areas with Shadowing Caused by a Cylindrical Hill[J]. IEEE Transactions on Antennas and Propagation, 2017, 55(9):2632-2636. doi: 10.1109/TAP.2007.904151
[19]	MARTINEZ-INGLES M T, JUAN P G, RODRÍGUEZ J V, et al. UTD-PO Solution for Estimating the Propagation Loss dueto the Diffraction at the Top of a Rectangular Obstacle When Illuminated from a Low Source[J]. IEEE Transactions on Antennas and Propagation, 2013, 61(12):6247-6250. doi: 10.1109/TAP.2013.2281822
[20]	ZHANG Y, LIN Z, ZHAO X, et al. Performance of a Massively Parallel Higher-Order Method of Moments Code Using Thousands of CPUs and Its Applications[J]. IEEE Transactions on Antennas and Propagation, 2014, 62(12):6317-6324. doi: 10.1109/TAP.2014.2361135
[21]	MANICA B, SMULL A P, ROUET F H, et al. Efficient Scalable Parallel Higher Order Direct MoM-SIE Method with Hierarchically Semiseparable Structures for 3-D Scattering[J]. IEEE Transactions on Antennas and Propagation, 2017, 65(5):2467-2478. doi: 10.1109/TAP.2017.2673660
[22]	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.
[23]	姜雪松, 江树刚, 张玉, 等. 国产众核处理器百万核时域有限差分并行计算[J]. 西安电子科技大学学报, 2017, 44(6):65-69.
	JIANG Xuesong, JIANG Shugang, ZHANG Yu, et al. Parallel FDTD Computation of Million Cores with the Domestically-Made Many-Core Supercomputer[J]. Journal of Xidian University, 2017, 44(6):65-69.
[24]	WANG W, CHEN X, LI H, et al. A Multilevel Method with Novel Correction Strategy for Parallel Finite-Element Analysis of Electromagnetic Problems[J]. IEEE Transactions on Antennas and Propagation, 2018, 66(7):3787-3791. doi: 10.1109/TAP.2018.2816680
[25]	YAMAGUCHI T, KAWASE Y, MURASE T. Hybrid Parallel FEM on PC Cluster with Multi-core Processor[C]// 23rd International Conference on Electrical Machines and Systems (ICEMS 2020).Piscataway:IEEE, 2020:1878-1881.
[26]	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.
[27]	张玉, 梁昌洪. 并行UTD算法及在机载天线分析中的应用[J]. 电子学报, 2003, 31(3):332-334.
	ZHANG Yu, LIANG Changhong. Parallel UTD Algorithm and Its Application to the Analysis of Airborne Antennas[J]. Acta Electronica Sinica, 2003, 31(3):332-334.
[28]	宗卫华, 梁昌洪, 曹祥玉, 等. 圆锥体与圆柱体的几何绕射理论绕射线寻迹[J]. 西安电子科技大学学报, 2002, 29(4):482-485.
	ZONG Weiha, LIANG Changhong, CAO Xiangyu, et al. Diffraction Ray Tracing of GTD on the Cone and Cylinder[J]. Journal of Xidian University, 2002, 29(4):482-485.
[29]	汪茂光. 几何绕射理论[M].第二版. 西安: 西安电子科技大学出版社,1994.
[30]	王萌, 陈晓洁, 梁昌洪. UTD算法中平板二阶场的求解[J]. 西安电子科技大学学报, 2007, 34(3):433-437.
	WANG Meng, CHEN Xiaojie, LIANG Changhong. Computation of Double Reflection and the Diffraction Field of Plane for UTD[J]. Journal of Xidian University, 2007, 34(3):433-437.
[31]	王楠. 现代一致性几何绕射理论[M]. 西安: 西安电子科技大学出版社, 2011.
[32]	SCHETTINOD N, MOREIRA F J, REGO C G. Novel UTD Coefficients for Lossy Conducting Wedges[C]//SBMO/MTT-S International Microwave & Optoelectronics Conference. Piscataway:IEEE, 2007:270-274.
[33]	WANG N, DANG X, YUAN H, et al. Quasi-Hybrid Scheme of NURBS-UTD Method[J]. Microwave and Optical Technology Letters, 2011, 53(12):2963-2967. doi: 10.1002/mop.v53.12

Parallel UTD method for calculation of electromagnetic problems in city environments

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