MIMO-VLC通信系统多径信道特性研究
发布时间：2018-07-28 19:36
【摘要】：作为一种未来的室内无线宽带接入方案,可见光通信(VLC)与红外通信以及射频通信相比有其独特的优势。首先,它的带宽很宽,能够实现更高的通信速率,可轻易达到每秒几十兆甚至几百兆,且光谱无需授权。其次,可以直接利用LED照明灯具作为光发射机,因此具有极高的成本优势,另外它对人体不会造成辐射损害,也具有更好的保密性能。目前可见光通信技术得到了越来越多的国家的重视,特别是日本、欧洲和美国。中国的各大院校和研究机构也相继展开了有关的研究,并开始取得一定的成果。 本文首先分析了可见光通信的基本特性、基本构成和应用场景,介绍了各国对可见光通信技术的研究现状,归纳了可见光通信系统的关键技术与发展趋势。然后比较了传统射频MIMO与可见光MIMO的实质性差异,对室内可见光MIMO的信道特性进行了研究,并将之应用到Simulink通信系统中分析了其误码率曲线。 本文主要的研究内容包括：以普通室内场景为典型应用目标,对可见光SISO、2×2MIMO、4×4MIMO系统的多径信道特性进行了仿真分析；其中对可见光的4×4MIMO信道模型进行了特别细致的分析,并选取矩形排列和直线型两种有代表性的光发射机排列方式进行分析对比；建立了Simulink系统模型进行仿真,分析了在应用了多径信道后SISO、2×2MIMO、4×4MIMO三类系统的性能表现,得出三者的误码率曲线；分析了在分别采用迫零均衡、最大似然均衡、最大似然均衡+后向反馈三种不同方法时4×4MIMO系统的信噪比(SNR)与误码率关系。
[Abstract]:As a future indoor wireless broadband access scheme, visible light communication (VLC) has its unique advantages compared with infrared communication and radio frequency communication. First, it has a wide bandwidth, can achieve higher communication rates, can easily reach tens of megabytes per second or even hundreds of megabytes per second, and the spectrum does not require authorization. Secondly, LED lighting can be directly used as optical transmitter, so it has a high cost advantage, in addition, it will not cause radiation damage to the human body, but also has a better security performance. At present, visible light communication technology has been paid more and more attention by more and more countries, especially Japan, Europe and the United States. China's universities and research institutions have also launched the relevant research, and began to achieve certain results. In this paper, the basic characteristics, basic structure and application scene of visible light communication are analyzed, and the research status of visible light communication technology in various countries is introduced, and the key technology and development trend of visible light communication system are summarized. Then, the differences between traditional RF MIMO and visible light MIMO are compared, and the channel characteristics of indoor visible light MIMO are studied and applied to Simulink communication system to analyze the BER curve. The main contents of this paper are as follows: taking ordinary indoor scenes as typical application targets, the multipath channel characteristics of visible light SISO2 脳 2MIMO4 脳 4MIMO system are simulated, and the 4 脳 4MIMO channel model of visible light is analyzed in detail. Two typical optical transmitter arrangement modes, rectangular arrangement and linear type, are selected for analysis and comparison, Simulink system model is established for simulation, and the performance of SISO2 脳 2MIMO-4 脳 4MIMO system after the application of multipath channel is analyzed. The error rate curves of the three systems are obtained, and the relationship between SNR (SNR) and bit error rate of 4 脳 4MIMO system is analyzed under three different methods of zero forcing equalization and maximum likelihood equalization backward feedback.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
本文编号：2151368
[Abstract]:As a future indoor wireless broadband access scheme, visible light communication (VLC) has its unique advantages compared with infrared communication and radio frequency communication. First, it has a wide bandwidth, can achieve higher communication rates, can easily reach tens of megabytes per second or even hundreds of megabytes per second, and the spectrum does not require authorization. Secondly, LED lighting can be directly used as optical transmitter, so it has a high cost advantage, in addition, it will not cause radiation damage to the human body, but also has a better security performance. At present, visible light communication technology has been paid more and more attention by more and more countries, especially Japan, Europe and the United States. China's universities and research institutions have also launched the relevant research, and began to achieve certain results. In this paper, the basic characteristics, basic structure and application scene of visible light communication are analyzed, and the research status of visible light communication technology in various countries is introduced, and the key technology and development trend of visible light communication system are summarized. Then, the differences between traditional RF MIMO and visible light MIMO are compared, and the channel characteristics of indoor visible light MIMO are studied and applied to Simulink communication system to analyze the BER curve. The main contents of this paper are as follows: taking ordinary indoor scenes as typical application targets, the multipath channel characteristics of visible light SISO2 脳 2MIMO4 脳 4MIMO system are simulated, and the 4 脳 4MIMO channel model of visible light is analyzed in detail. Two typical optical transmitter arrangement modes, rectangular arrangement and linear type, are selected for analysis and comparison, Simulink system model is established for simulation, and the performance of SISO2 脳 2MIMO-4 脳 4MIMO system after the application of multipath channel is analyzed. The error rate curves of the three systems are obtained, and the relationship between SNR (SNR) and bit error rate of 4 脳 4MIMO system is analyzed under three different methods of zero forcing equalization and maximum likelihood equalization backward feedback.
【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN919.3
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