无线电波传播

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 .

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

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

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

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 .

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 .

介绍了无线电波传播模型的作用、CW测试原理及规划软件Planet中的General模型的校正，并分析了问题区域存在的原因。

Wireless Propagation Model is the basis of Network Planning . It 's very important either in network establishing or in optimization later . The function of wireless propagation model , CW test principles and the modeling of Planet 's general model are presented in this paper .

提出了煤矿工作面上UHF无线电波传播的模型，即超大尺寸、周期加载的非理想波导模型，由此导出了传播常数的模式方程，得到了主模型的传播常数。

An oversized imperfect periodically loaded waveguide mode in proposed to study the propagation of UHF radio wave in a long wall face of a coal mine . The equation constant the propagation constants is derived , the solution for the propagation of the dominant mode is obtained .

沙尘暴对无线电波传播影响的研究

Advances on research of sand dust storm disturbing radio wave 's propagation

无线电波传播的随机游动模型及其应用

Random Walk Model of Radio Wave Propagation and its Applications

井下巷道超高频无线电波传播及定位算法的研究

Research on the UHF Radio Wave Propagation and Location Algorithms in Mine Tunnels

较复杂的电子技术是利用光或无线电波传播。

The highly sophisticated electronic methods rely on either light or radio wave propagation .

空间环境对无线电波传播的影响综述

The influence of space environments on radio propagation

电离层无线电波传播利用流媒体技术和移动无线网络构建广播异地直播传输新模式

Use Streaming Media Technology and Mobile Network Technology to Construct New Mode to Realize Trans-Regional Live Radio Broadcast

由于室内环境的复杂性，给室内无线电波传播的预测带来了很大的困难。

Because of the complication of the indoor environment , it causes many difficulties for predicting wave propagation in the case .

射线跟踪法是近年来常用于城市微小区和室内环境无线电波传播信道特性预测的方法，但其在具体实现方面仍有许多问题需要进一步的研究。

Ray-tracing technique is an efficient method to analyse the propagation in urban and indoor environment , but there are still many questions which need to be studied while realizing .

但是，由无线电波传播路径上非正常的土地电参数（电导率、电介常数）产生的速度误差将会严重地降低定位的精度。

But , the velocity error which is occured from unnormal earth electrical parameter ( conductivity , permitivity ) on radio-wave propagating path will severely reduce the accuracy of locating .

随着高速铁路在中国乃至世界范围内的快速发展，高速铁路环境中无线电波传播理论的研究也越来越重要。

With the development of the High-speed Railway all over China and the world , the research of wireless propagation theory in the High-speed Railway is more and more important .

由于无线电波传播的物理环境常常难以控制，导致无线通信的信道特性通常是时变的，因而，快速准确的信道估计与均衡在有效的通信系统中必不可少。

The wireless communication channel is usually time-varying because radio wave propagation is difficult to control . Therefore , accurate channel estimation and equalization are very crucial for an effective communication system .

详细分析了大地媒质的特性及其各种参数对无线电波传播的影响，给出了适合透地通信的工作频段；

Then , the characteristic of the stratum and all kinds of parameters tied closely to transmission of the radio wave are analyzed , and the working frequency band is given as well .

无线电波传播预测的方法分为两类：一是用冲激响应法，即根据实验、统计所得数据建立经验性传播预测模型；

The methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond , that is establish the empirical model based on experimental and statistical data ;

接着重点阐述了利用射线跟踪技术这种确定性的分析方法预测无线电波传播特性的基本原理、方法，以及它在微蜂窝小区的电波传播特性研究中的优势。

With that , emphases were be put on the basic principle 、 methods and its advantages in the study on the characteristic of the microcell based on ray tracing method of determinate analysis means .

中继技术可以用于解决这些特殊电磁区域的场强覆盖。本文首先介绍了与研究领域有关的中继技术、无线电波传播规律及无线传播环境的相关知识。

Relay technology can be useful in these special electromagnetic regions . First , this article introduced a little knowledge of radio wave propagation and wireless communication environment . They are related with relay technology .

在考虑到地球曲率、大气无线电折射率垂直梯度、地表反射系数和地面粗糙度等因素对无线电波传播影响的条件下，推演了计算雷达波束内能量分布和气象目标物回波功率的表达式。

The equations for calculating the echo power and the energy distribution within radar beam were derived , with taking earth curvature , atmospheric refractivity gradient , reflective factor and roughness of the surface into consideration .

无线电波传播速度同光速一样，假设这种信使接收到我们于本世纪20年代的初次广播，则送往其母行星的信息现在仅走过一半路程。

Radio waves also travel at the speed of light , and assuming such an automatic messenger picked up our first broadcasts of the1920 's , the message to its home planet is barely halfway there .

而精确预测无线电波传播路径损耗特性，则为合理的微蜂窝无线网络规划、设计提供了必要条件，同时也是研究微蜂窝移动通信系统性能的前提。

Forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network , at the same time it is a precondition for the research on the microcell mobile system .

传播模型是对无线电波传播过程中的路径损耗进行预测，不同的传播模型有不同的路径损耗公式，经典传播模型虽具有相当大的普遍适用性，但是对于具体环境需具体分析。

Propagation model are used to predict the path loss on the radio wave path . Different model has different propagation path loss formula , although classical propagation models have considerable general applicability , but they need a detailed analysis for the specific environment .

笔者在参照国外先进整枝技术的基础上，采用遥控、无线电波传播、遥控编解码、系统加密等技术，自行设计研制了一套立木整枝机器人无线电遥控系统。

Based on studying the advanced pruning technology of developed countries , by employing the techniques of remote control , radio propagation , coding and decoding of remote control and system encryption , we developed a new wireless remote control system for stumpage pruning robot .

随着室内无线电设备使用越来越广泛，对室内的场进行预测，并对无线电波传播特性进行研究是十分必要的，因此采用正确的方法是十分重要的。

With more and more people using the wireless devices , it is very necessary to predict the field strength in the room and study propagation characters of the wireless electric wave F therefore , it is very important to adopt exact method to study them .

地下巷道中UHF特高频无线电波的传播

Propagation of the ultrahigh frequency ( UHF ) radio wave in the underground tunnel