本文選題：可見(jiàn)光通信 + 無(wú)線局域網(wǎng)�。� 參考：《南京郵電大學(xué)》2017年碩士論文

【摘要】：可見(jiàn)光通信(VLC)采用白光LED作為光源,具有無(wú)需授權(quán)的較高帶寬,可在無(wú)線射頻(RF)敏感的環(huán)境中使用,是室內(nèi)短距無(wú)線接入的重要解決方案之一。在實(shí)際的網(wǎng)絡(luò)應(yīng)用中,上行鏈路傳輸方案還面臨許多問(wèn)題,無(wú)線局域網(wǎng)(如WiFi)提供了較大范圍的覆蓋區(qū)域,可有效補(bǔ)充VLC受視距傳輸(LOS)的限制。論文針對(duì)典型室內(nèi)無(wú)線接入應(yīng)用環(huán)境中的VLC+WiFi異構(gòu)融合網(wǎng)絡(luò)進(jìn)行了研究。論文首先簡(jiǎn)述了VLC系統(tǒng)原理和關(guān)鍵技術(shù),包括白光LED及其工作特性、室內(nèi)信道傳輸特性等。然后詳細(xì)分析了基于VLC+WiFi協(xié)同的室內(nèi)無(wú)線接入網(wǎng),對(duì)雙向鏈路傳輸方案、組網(wǎng)方式及切換策略等進(jìn)行了深入研究,分析得出了基于VLC和WiFi異構(gòu)組網(wǎng)的切換策略以及布局方案。論文提出了一種等價(jià)信噪比切換算法。改進(jìn)算法根據(jù)WiFi信噪比與VLC等價(jià)信噪比間的差值與設(shè)定切換門(mén)限的對(duì)比結(jié)果進(jìn)行切換觸發(fā),使切換算法能精確感知并比較不同傳輸方式的性能;同時(shí)引入了駐網(wǎng)定時(shí)器機(jī)制,進(jìn)行判決切換的短暫保持,以保證判決的準(zhǔn)確性。論文最后針對(duì)可見(jiàn)光通信與無(wú)線局域網(wǎng)技術(shù)聯(lián)合光源端收發(fā)機(jī)和移動(dòng)端收發(fā)機(jī)進(jìn)行了設(shè)計(jì),設(shè)計(jì)實(shí)現(xiàn)了Demo系統(tǒng),實(shí)際切換測(cè)試驗(yàn)證了設(shè)計(jì)方案的可行性。
[Abstract]:Visible light communication (VLC), which uses white LED as light source, has high bandwidth without authorization and can be used in radio frequency (RF) sensitive environment. It is one of the most important solutions for indoor short-range wireless access. In practical network applications, uplink transmission schemes also face many problems. Wireless local area networks (WLAN), such as WiFi, provide a wide range of coverage areas, which can effectively supplement VLC with the limitation of line-of-sight transmission (Los). This paper studies the VLC WiFi heterogeneous fusion network in the typical indoor wireless access application environment. Firstly, the principle and key technologies of VLC system are briefly introduced, including white LED and its working characteristics, indoor channel transmission characteristics and so on. Then, the indoor wireless access network based on VLC WiFi collaboration is analyzed in detail, and the two-way link transmission scheme, networking mode and handover strategy are deeply studied, and the handover strategy and layout scheme based on VLC and WiFi heterogeneous network are obtained. In this paper, an equivalent signal-to-noise ratio switching algorithm is proposed. By comparing the difference between WiFi signal-to-noise ratio (SNR) and VLC equivalent signal-to-noise ratio (VLC) and setting the switching threshold, the improved algorithm can accurately perceive and compare the performance of different transmission modes. Make a short stay of the decision switch to ensure the accuracy of the decision. In the end, the paper designs the transceiver and transceiver on the mobile side and the transceiver on the combination of visible light communication and wireless local area network technology. The Demo system is designed and realized. The feasibility of the design is verified by the actual switch test.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN92;TN929.1

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