發(fā)布時(shí)間：2018-07-28 19:36

【摘要】：作為一種未來(lái)的室內(nèi)無(wú)線寬帶接入方案,可見光通信(VLC)與紅外通信以及射頻通信相比有其獨(dú)特的優(yōu)勢(shì)。首先,它的帶寬很寬,能夠?qū)崿F(xiàn)更高的通信速率,可輕易達(dá)到每秒幾十兆甚至幾百兆,且光譜無(wú)需授權(quán)。其次,可以直接利用LED照明燈具作為光發(fā)射機(jī),因此具有極高的成本優(yōu)勢(shì),另外它對(duì)人體不會(huì)造成輻射損害,也具有更好的保密性能。目前可見光通信技術(shù)得到了越來(lái)越多的國(guó)家的重視,特別是日本、歐洲和美國(guó)。中國(guó)的各大院校和研究機(jī)構(gòu)也相繼展開了有關(guān)的研究,并開始取得一定的成果。 本文首先分析了可見光通信的基本特性、基本構(gòu)成和應(yīng)用場(chǎng)景,介紹了各國(guó)對(duì)可見光通信技術(shù)的研究現(xiàn)狀,歸納了可見光通信系統(tǒng)的關(guān)鍵技術(shù)與發(fā)展趨勢(shì)。然后比較了傳統(tǒng)射頻MIMO與可見光MIMO的實(shí)質(zhì)性差異,對(duì)室內(nèi)可見光MIMO的信道特性進(jìn)行了研究,并將之應(yīng)用到Simulink通信系統(tǒng)中分析了其誤碼率曲線。 本文主要的研究?jī)?nèi)容包括：以普通室內(nèi)場(chǎng)景為典型應(yīng)用目標(biāo),對(duì)可見光SISO、2×2MIMO、4×4MIMO系統(tǒng)的多徑信道特性進(jìn)行了仿真分析；其中對(duì)可見光的4×4MIMO信道模型進(jìn)行了特別細(xì)致的分析,并選取矩形排列和直線型兩種有代表性的光發(fā)射機(jī)排列方式進(jìn)行分析對(duì)比；建立了Simulink系統(tǒng)模型進(jìn)行仿真,分析了在應(yīng)用了多徑信道后SISO、2×2MIMO、4×4MIMO三類系統(tǒng)的性能表現(xiàn),得出三者的誤碼率曲線；分析了在分別采用迫零均衡、最大似然均衡、最大似然均衡+后向反饋三種不同方法時(shí)4×4MIMO系統(tǒng)的信噪比(SNR)與誤碼率關(guān)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.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN919.3

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本文編號(hào)：2151368