ITU-R

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

文章介绍ITU-R建议中五项电波传播技术模式的研究情况。

The digital video conversion interface system of ITU-R BT.656 based on FPGA

基于FPGA的ITU-RBT.656数字视频转换接口系统

This paper discusses two modified methods on combination objective assessment on audio signal based on ITU-R BS.1387-1 .

本文以ITU-RBS.1387-1为基础，讨论了两种对联合客观音量评价的改进。

Introduction of ITU-R Recommendations of IMT-2000 3G Mobile Communication Systems

第三代移动通信IMT-2000的ITU-R推荐标准概述

Establishing Atmospheric Profile with Correcting Model of ITU-R

ITU-R修正模式建立大气剖面

IMF-2000 which is introduced by ITU-R is a global , highly intelligent and personal service featured mobile telecommunication network .

IMF-2000是国际电联提出的一个全球覆盖的、具有高度智能和个人服务特色的移动通信网。

Especially , smart antenna and MIMO defined in ITU-R report on technology trends can enhance by multiple folds the capacity of communication system and spectrum utilization without increasing bandwidth .

特别是，作为ITU-R技术发展趋势中定义的智能天线技术和MIMO技术，能在不增加带宽的情况下成倍地提高通信系统的容量和频谱利用率。

Considering the nonlinear affects of various parameters on rain attenuation , we propose a new rain attenuation model based on evolutionary neural network and compare it with the ITU-R model .

本文在考虑多个参数对雨衰减非线性影响的基础上，建立了基于进化神经网络的雨衰减模型，并与ITU-R模型进行了比较。

The thesis is focused on content as following : 1 . In-depth study of ITU-R P.1546 . This paper emphatically analysed the key parts of technical and present a simple calculation model . 2 .

主要研究内容如下：1.对ITU-RP.1546建议书进行了深入研究，文中重点分析了ITU-RP.1546建议书中的关键要素，并提炼出简要计算模型。

According to the ITU-R turbulance structure constant model , the SNR and BER varied with the altitude at different wavelengths and different zenith angles are simulated numerically with FORTRAN .

依据ITU-R公布的随高度变化的大气结构常数模型，用FORTRAN对信噪比和误码率在不同波长与不同天顶角的条件下随高度的变化情况进行了数值模拟。

This paper describes models and algorithms for realizing the reference model proposed in ITU-R M.1225 for each test-operating environment including indoor office , outdoor-to-indoor / pedestrian and vehicular .

描述了基于ITU-RM.1225的包括室内、室外到室内/步行和车载等测试环境的IMT-2000信道模拟器设计及仿真实现。

This paper discusses the method of computing rainfall rate using ITU-R 837-2 model proposed by the ITU ( International Telecommunication Union ), and makes application analysis study of this method with the support of geographic information system and database .

论述了国际电联ITU-R837-2模式计算雨强值的方法，在地理信息系统。（GIS）和数据库技术的支持下，对该方法进行了应用分析研究。

The paper introduced the present study status of rain attenuation home and abroad and mechanism of the rain attenuation , physical characters of the rainfall , discussed two wide application rain attenuation prediction models : ITU-R model and DAH model .

本文首先介绍了雨衰减在国内外的研究现状以及雨衰减的机理和降雨的物理特性，论述了两种广泛应用的雨衰减预测模型：ITU-R模型和DAH模型。

The presented measurement and analysis results can provided references and guidelines for performance evaluation and deployment of the IMT-Advanced system . The measurement results in indoor hotspot and outdoor relay scenarios are adopted by the ITU-R and 3GPP-LTE + standardization , respectively .

本文涉及室内热点场景和室外中继场景的测量结果分别被ITU-R和3GPP-LTE+组织接受，提出的方法可以广泛应用于信道测量和建模工作，测量和分析结果可以为IMT-Advanced性能评估和系统部署提供参考。

Lastly , the horizontal paths atmospheric propagation model is extended to the ground-to-space path . Under taking into account outer scale of atmospheric turbulence , the characteristic of beam wander for the uplink path is calculated by applying the ITU-R turbulence structure constant model .

最后，将水平路径大气传输模型引入到地-空路径中，并应用随高度变化的ITU-R湍流大气结构常数模型和考虑外尺度时计算了上行链路光束漂移特性。