电波传播

地理信息系统（geographicalinformationsystem，GIS）在无线电波传播预测中得到了广泛的应用，并产生了巨大的经济效益。

Geographical Information System has been applied widely in the field of radio propagation prediction and made huge economic profit .

隧道中UHF窄带无线电波传播信道的特性

Characterization of Narrow Band UHF Radio Propagation Channels in Tunnel Environments

研究与电波传播预测相关的GIS技术。

The GIS technology which is related to the propagation forecasting is studied .

基于MATLAB语言的电波传播路径损耗的仿真

Simulation of the Path Loss for Radio Wave Propagation Based on MATLAB Language

射线跟踪电波传播模型计算分析及其在无线电管理GIS系统中的应用

Analysis for Ray Tracing Propagation Model and Its Application in Radio Wave Management GIS System

核环境中HF无线电波传播的计算机模拟

Computer simulation of HF radiowave propagation in nuclear environment

室内WLAN环境电波传播预测的改进模型

Indoor WLAN Environment Radio Communication Models to Improve Forecast

室内电波传播特性的FDTD法分析

Characteristic Analysis of Indoor Radio Wave Propagation by FDTD Method

椭圆隧道中UHF电波传播特性

Theory of the Propagation of UHF Radio Waves in Elliptical Tunnels

双层磁性d波超导结的直流Josephson电流的性质对流层波导电波传播

Characteristics of DC Josephson Current in Double-layer Magnetic d-wave Superconductor Junction

沙尘暴对地空路径上Ka频段电波传播的影响

Effect of sand and dust storms on Ka-band electromagnetic wave propagation along earth-space paths

大气行星波对LF和VLF无线电波传播的影响

Effects of the atmospheric planetary waves on radio wave propagation at LF and VLF

经过理论分析和仿真计算，由两个电波传播模型分别得出RFID装置可能的最大识别距离。

Through theory analysis , simulation and calculation , each of maximum identification ranges of the RFID device is gained by using those two models respectively .

目前，多数无线电管理GIS系统中包括了宏蜂窝电波传播预测的模块，而基于射线跟踪模型的微蜂窝电波传播预测的应用还相对较少。

At present , the prediction model for macrocells has been integrated to most of the radio wave management GIS system , but the application of prediction for microcells is only few .

利用改进的BP算法，结合电波传播理论，建立了随机雨介质的等效复折射指数的神经网络模型。

The neural network model of the equivalent complex refractive of random rain media is developed by means of the improved BP algorithm , based on the electromagnetic wave propagation theory .

但由于无线电波传播的开放性，使得针对WLAN的监听非常容易，WLAN的安全性受到了巨大挑战。

The opening of wireless wave makes the sniffing arm at WLAN much easier , and the security of WLAN faces the terrible challenge .

用修正的UTD模型预测室内电波传播

Propagation Prediction in Indoor Environments with a Modified UTD Model

其速度（距离变化率）误差是利用与距离误差△R之间的关系得到，而△R由微波辐射计在电波传播路径上直接测量大气辐射亮度温度得到。

The error of missile speed was deduced by the distance error . The distance error was obtained by a microwave radiometer directly detecting the atmospheric radiation brightness temperature on the path of radio wave propagation .

但在野外通信条件下，远程无线通信将面临恶劣的NLOS电波传播环境。

However , the remote wireless communications will face the abominable transmitting condition for NLOS radio wave in field .

文章介绍ITU-R建议中五项电波传播技术模式的研究情况。

Studies are presented on five radio propagation models in ITU-R recommendations .

由于星载SAR等系统的发展，这些问题成为电离层电波传播和雷达领域的热点问题之一，亟待解决。

Partly because of the development of satellite-based SAR , this field has become one of hot topics in both ionospheric radio propagation and radar techniques , and is in urgent need of further study .

结合本文提出的电波传播预测模型和算法以及无线网络优化的流程和方法，本文给出了几个上海电信PHS无线网络优化的典型案例。

At the end of this dissertation , we give several typical cases of the wireless network optimization with the models and methods given in this dissertation .

其次，对无线电波传播特性和无线信道的传输特性进行分析，并给出了无线信道模型及TD-SCDMA系统物理层结构。

Secondly , we analyze the transmission characteristics of radio wave and wireless channel , and gives wireless channel model and detailed description of the physical layer structure of TD-SCDMA system .

在计算高功率微波（HPM）在大气层中传播时，需要知道非电离与电离混合大气层中电波传播速度。

When analyzing the propagation of high power microwave ( HPM ) in atmosphere , the propagation velocity in non ionized and ionized mixture atmosphere is needed .

由于降雨对Ka波段卫星通信系统的电波传播的衰减较大，成为影响其传输质量的重要因素之一。

Rainfall has become one of the key factors which influence the transmission quality , because it has great attenuation to the electronic wave transmission of Ka band satellite communication system .

使用时域电磁场数值计算方法计算白天全海水传播路径电波传播的衰减，分析复杂边界条件中VLF电波传播损耗，并对波导边界变化对VLF传播特性的影响作了讨论。

The attenuation on the sea is computed using electromagnetic calculation method and the attenuation of propagation is analyzed on the complicated boundary conditions .

分析了电离层电波传播特性，并估算了电离层对X波段传播链路的影响，得出数据下传过程与电离层之间不会相互干扰的结论。

And then the characteristics of the radio propagation in ionosphere are analyzed and the impacts on X band propagation link caused by ionized layer are estimated , and the results show that the ionized layer does not disturb the data downlink each other .

利用GIS的空间数据可视化技术，研究电波传播预测的可视化方法。3.在以上两方面的工作的基础上，重点研究电波绕射模型的实现及应用。

Based on the visual technology of the space data of the GIS , the visual method of the propagation forecasting is researched . 3 . Following the work above , more efforts have been paid on the realization and application of the diffraction propagation model .

等离子体电波传播及散射问题的CDRC-ADI-FDTD方法

CDRC-ADI-FDTD Method for EM Wave Propagation and Scatter in Plasmas

最后，介绍了我们建立的UWB室内电波传播仿真系统，包括图形用户界面（GUI）系统和该仿真系统所采用的室内信道确定模型，并对该系统尚存的缺陷以及实际应用价值做了分析。

At last , it introduces the UWB radio wave simulation system that we built , including the introduction of the Graphical User Interface ( GUI ) system and the indoor established channel model which this simulation system uses .