本文主要介绍由实验测量和统计分析方法得到的UWB信道模型，包括UWB系统的路径损耗模型和多径衰落模型。 u。
This paper will introduce the channel models for UWB, which include path loss models and multi-path fading models obtained by large measurements and statistical analysis.
本文首先对统计机器翻译若干主要方法进行了研究和探讨，包括基于信源信道思想和基于最大熵思想的若干模型。
In this paper, some major methods of statistical machine translation are researched and discussed, including source-channel model and maximum entropy model.
本文从信道的统计特性出发，介绍了仿真研究所用的一种新的电离层宽带信道数学模型——ITS模型。
On the ground of the channel statistical characteristic, this paper introduces a new wideband channel model, ITS channel model, which is used by the emulation.
在研究接收信号(含直射和方向性散射)复包络二阶统计特性的基础上，采用AR模型对信道进行仿真。
It explores the second order statistics of fading envelopes influenced by nonisotropic scattering environments with light-of-sight (LOS), and USES an AR model for channel simulation.
对于当前没有较完备的无人机通信系统实测数据时，进行无人机通信信道的统计模型建立和仿真等方面的研究具有重要意义。
The model built in this paper has great significance to performance simulation of the UAV communication channel when no measurement data are available.
在对卫星移动信道传输特性统计模型研究分类的基础上，给出了适合卫星移动信道的部分阴影扩展模型。
Based on the statistical model classification of mobile satellite communication channel, a partial-shadowing extended model suited for mobile satellite channel is proposed.
在对卫星移动信道传输特性统计模型研究分类的基础上，给出了适合卫星移动信道的部分阴影扩展模型。
Based on the statistical model classification of mobile satellite communication channel, a partial-shadowing extended model suited for mobile satellite channel is proposed.
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