A Study on Electromagn etic Wave Propagation Prediction for Mobile Communication in an Urban Space

城市空间移动通信电磁波传播预测研究

• 批准号: 13650425
• 负责人: SHIRAI Hiroshi
• 金额: $ 2.18万
• 依托单位: Chuo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650425/
• 关键词: Mobile communication; Electromagnetic wave propagation; Visualization; Reflection coefficient; GTD; Ray tracing; Polygonal approximation; SBR Method; SBR; 等価インピーダンス; 多角形導体近似; 等価インピーダンス近似

Electromagnetic scattering by the building walls has been analyzed first, since this is one of the important factors for predicting the wave propagation in urban area enclosed by tall buildings. For the analysis of crack scattering, we could establish the depth estimation method from back scattering response for cracks on the metal surfaces.Next, Adaptive shooting and Bouncing Rays (Adaptive SBR) method has been proposed to analyze electromagnetic wave propagation effectively, by 2Dcross sectional analysis, our method has been tested in detail how many multiple reflections and diffractions should be included, and how many samples should be taken to estimate the global field distribution.In order to check the accuracy of the method, the results are compared with those obtained by the Finite Difference Time Domain (FDTD) Method. Test measurements are also done for signal strength from base station for 1.9GHz (PHS) band. Good agreement has been found to show the validity of our method. We have also tried to find more efficientalgorithm and fast calculation method to handle more karger sample data.

建筑物墙体的电磁散射是预测城市高层建筑群中电磁波传播的重要因素之一，本文首先分析了建筑物墙体的电磁散射。在裂纹散射分析中，我们可以建立由金属表面裂纹的后向散射响应估计裂纹深度的方法。提出了一种有效分析电磁波传播的自适应SBR方法，通过二维截面分析，详细地测试了该方法应包含多少次反射和衍射，为了验证该方法的准确性，将计算结果与时域有限差分法（FDTD）的结果进行了比较。对1.9GHz（PHS）频段的基站信号强度进行了测试。良好的协议已被发现，以显示我们的方法的有效性。我们还试图找到更有效的算法和快速计算方法来处理更多的karger样本数据。

项目成果

佐藤 亮一: "2.4GHz帯の室内電磁波伝搬モデリングに関する一考察"電子情報通信学会2003年総合大会講演論文集. (CD-ROM). (2003)

Ryoichi Sato：“2.4 GHz 频段室内电磁波传播建模研究”IEICE 2003 年大会论文集（CD-ROM）。

関口秀紀, 白井宏, 佐藤亮一: "電磁波を用いた導体平板上のクラック検出に関する一考察"電気学会 電磁界理論研究会資料. EMT-01-103. 43-48 (2001)

Hideki Sekiguchi、Hiroshi Shirai、Ryoichi Sato：“利用电磁波检测导体平板上的裂纹的研究”IEEJ 电磁场理论研究组材料 EMT-01-48 (2001)。

Ryoichi SATO: "A study on indoor radio wave propagation modeling at 2.4GHz band"Proc. of 2003 IEICE General Conference. Vol.C-1-13(CDROM). (2003)

Ryoichi SATO：“2.4GHz 频段室内无线电波传播建模的研究”Proc。

Hiroshi SHIRAI: "A simple crack depth estimation method by using monostatic RCS"Proc. of 2003 IEEE Instrumentation & Measurement Technology Conference (IMTC 2003). 1143-1146 (2003)

Hiroshi SHIRAI：“使用单静态 RCS 的简单裂纹深度估计方法”Proc。

Hidenori SEKIGUCHI: "The depth estimations for cracks of different cross sectional shapes"Technical Report of lEE Japan. vol.EMT-03-27. 1-6 (2003)

Hidenori SEKIGUCHI：“不同横截面形状的裂纹的深度估计”日本 lEE 技术报告。