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摘要随着技术的进步，高速铁路迎来了巨大的发展。在高铁通信系统中,移动端的快速移动将产生较大的多普勒频移,未来移动通信系统将不可避免地面临高速移动环境下的传输速率、带宽、自适应以及QoS (Quality of Service)的挑战。无线信号会受到速度较快,多径衰落等所带来的影响。因此,对无线信道模型的研究就显得极为重要。38510
- 上一篇：OFDM通信系统分析及其Simulink仿真
- 下一篇：超宽带UWB无线通信信道建模与仿真
在此研究背景下,本文首先阐述了该论文的背景和意义以及无线移动通信发展概况和瑞利衰落信道国内外的研究现状和发展趋势。然后从大尺度衰落和小尺度衰落两个角度详细的解释了移动信道的传播特性然后根据高速铁路环境下电波传播特性,对高速复杂环境下移动信道的特点进行了研究，在Rayleigh 衰落下，建立了有关无线移动信道的模型。并在Clarke模型和Jakes 仿真模型的基础上,提出了一种改进的更符合现实要求复杂环境下的移动信道模型。并对信道建模仿真作了阐明，主要对高速移动环境下的瑞利衰落信道模型、无线移动传播特性、MATLAB仿真分析进行了研究。
毕业论文关键词:高速移动环境 Clarke模型 Jakes 模型 Rayleigh衰落
Abstract
The rapid development of the rapid transit system, the mobile station fast moving will produce larger Doppler frequency shift, the future mobile communication system will inevitably face high-speed mobile environment under the transmission rate, bandwidth, and adaptive QoS in the challenge.In High-speed Rail communication, the multi-path fadingfast, has a great effect on the wireless signal. Therefore, the research on the model of wireless channel is very important. Under this background, this paper mainly in high-speed mobile environment under Rayleigh fading channel model, mobile radio propagation characteristics and MATLAB simulation analysis are studied.
This paper first describes the background and significance of the thesis and the development of wireless mobile communication survey and the Rayleigh fading channel to the domestic. Then from the large scale fading and small scale fading two aspects detailed explain the propagation characteristics of the mobile channel and according to the radio wave propagation characteristics in high-speed railway environment, under the condition of high speed and complex environment mobile channel characteristics is studied, simulation modeling of the channel as the clarified, the correlated Rayleigh fading is added to the channel modeling, the establishment of correlated Rayleigh fading channel model based on. And in the Clarke model and Jakes simulation model based on the proposed a improved more in line with the reality of the requirements under the complex environment model for mobile communication channel. From the simulation results, the mobile channel model can accurately simulate the actual channel characteristics, resistance to fading effects.
Keywords: Clarke model Jakes model Rayleigh fading Environment of high-speed mobile
目 录
摘 要 I
Abstract II
1 绪论 1
1.1 论文研究背景和意义 1
1.2 高速铁路信道模型的研究进展 2
1.3 本文的研究内容与结构安排 3
2 无线移动信道特性及相关衰落信道 4
2.1 移动信道的衰落特性 4
2.1.1 大尺度衰落特性 4
2.1.2 小尺度衰落特性 5
2.2 无线移动信道及信道特性分析 6
2.2.1 路径损耗 6
2.2.2 多普勒效应 6
2.2.3 时延扩展 7
2.2.4 衰落特性 7
2.3 高铁信道建模 8
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