文档介绍：编号:___________ _______
研究方向:_________ _ _______
2014年郑州大学第九届研究生论文大赛
题目:多径衰落信道下分集接收技术性能仿真
学科门类(文、理、工、医):工
院系:信息工程学院
专业:通信与信息系统
初审:
评审:
多径衰落信道下分集接收技术性能仿真
摘要:随着信息时代的到来,近几年来,在通信领域,很多的技术都得到了发展和应用,通信质量问题也得到越来越多的关注,当信号在实际的无线通信系统中传输时,多径传输的存在会而使信号产生衰落,衰落会影响通信的质量,多径效应是影响无线通信质量的一个重要因素,多径效应通常会影响信号的传输,然而分集技术可以有效的减弱多径效应带给无线信道的不良的影响。使用分集技术可以获得分集增益,通过获得分集增益来提高通信的质量。
本设计介绍了有关通信系统仿真的方法和概念,也对多径衰落信道做了详细的介绍,论文的最后一章用MATLAB仿真了多径衰落信道,通过仿真可以比较直观的看出此信道的特点,论文详细的介绍了几种分集合并技术,并对这几种技术做了简单的分析和比较,仿真了信号在不同的分集接收技术上的BER。
关键词:信号;多径效应;分集技术;通信仿真
The performance simulation of diversity reception technology on Rayleigh fading channel
Abstract:With the information ing, in recent years, in the field munication, many techniques are making a big development, munication quality issues have been more and more attention, when the signal transmit in a munication system .In multipath transmission signal will be fading, fading affects the quality of munication .multipath effect is an important factor affecting the quality of the munication, multipath effects usually affect the signal transmission, however, the diversity technique can be effectively reduced multipath effects bring the adverse effects of the radio channel. Diversity gain can be obtained by obtaining the diversity gain to improve the quality of munication using the diversity technique.
This topic provides munication system simulation methods and concepts. In this paper, I make a detailed introduction about multipath fading channel .In final chapter, MATLAB is used to simulate the multipath fading channel, Through the simulation we can see this channel characteristics more intuitive, the paper describes in detail several bining techniques, and these types of technology to do a simple analysis parison of simulated signals in different diversity reception technology BER.
Keywords: signal Multi-path effects diversity reception technology
1 绪论
引言
达接收端的信号路径不只有一条。即存在多径传输。多径传输会给信号带来多径衰落。多径衰落会使到达接收机的信号在实际的无线通信中,信号在传输过程中存在反射、折射、绕射