传播模型 meaning in English
dynamic transmission model
propagation model
Examples
- In order to utilize the frquency resource adequately and increase the capacity of mobile communication system , the wireless electric wave propagation of existing mobile system always adopts the microcell structure . 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 . 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 ; the other is ray tracing method , that is establish the deterministic model based on theoretical analyse . the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth , and introduce the common path loss transmition model in land mobile communication system , also point out the localization of these models based on experiential methods
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。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；另一种是用射线跟踪方法，即依据理论分析来建立确定性的传播预测模型。本文首先讨论了在地球表面均匀大气中的无线电波传播的基本特性，介绍了陆地移动通信系统中常用的几种电波传播路径损耗经验性预测模型，并指出了这些经验性传播模型对于微蜂窝小区无线电波传播特性研究的局限性。 - In chapter 4 , a simulation approach is presented , which combines the outdoor radio propagation model , the eigen - driven patterns of handset diversity antenna with two feed ports and combining schemes of receiving signals , to investigate the performance of a dual antenna handset under co - channel interference ( cci ) and multi - path fading environment
第四章首先用本征激励方向图的概念来产生手机双端口分集天线的接收信号矢量，然后将其与城市室外电波传播模型、分集合并方式相结合，建立了分析在具有共道干扰和多径衰落环境中手机双天线系统的性能模型。 - The present paper based on the mechanism of the vibration ' s production and transmission , simplifying the track system as elastic foundation beam model , and using a moving load which act on the beam to simulate the train , regarding four sorts of track system as research object , to evaluate the model of the vibration propagating of the track system under the moving load
本文基于振动产生及传播的机理，将轨道系统简化为弹性地基梁模型，将运行的列车模拟成一个作用在梁上的移动荷载，以新干线、 tgv 、在来线以及国内的武汉轻轨等四种轨道系统为研究对象，对移动荷载作用下轨道系统的振动传播模型进行了评价。 - Much reference of the algorithms and models can be got from the performance results for the practical design and layout . system - level simulation of hsupa builds the integrated platform and key models to describe and simulate the common structure and features of the radio network , including cell layout , path gain , traffic model , power control , handover , etc . , also the special ones of hsupa , including mac - es / e , node b controlled scheduling , harq , shorter tti , etc .
所谓hsupa系统级仿真就是要搭建系统级的仿真平台,对无线网络的公共结构和特性(例如小区布局,传播模型,衰落信道,天线模型,功率控制,切换, ue的分布和移动,业务的建立终止和中断等)和hsupa的专有结构和特性( mac - es / e , nodeb控制的调度, harq ,更短的tti )进行描述和建模。 - Through the analysis of the test data and the new development in the relevant literature , some more realistic models for sea - clutter and multipath propagation is concluded and the simulation is accomplished in the software . they provide the foundation for low - altitude radar target detection & tracking techniques research . in the second part , radar low - altitude target detection & parameters ( elevation - azimuth - range delay - doppler shift ) measure are studied
(海)杂波和目标信号的多径传播严重影响了雷达低空目标探测与跟踪的性能，通过分析国内外的有关试验数据和最新的研究进展，总结出比较接近实际的海杂波和多径传播模型，并在有关软件中实现了海杂波与多径传播的仿真，为进一步研究各种低空目标探测与跟踪测量算法提供了保证。