本文選題：可見光通信 + 無線局域網��； 參考：《南京郵電大學》2017年碩士論文

【摘要】：可見光通信(VLC)采用白光LED作為光源,具有無需授權的較高帶寬,可在無線射頻(RF)敏感的環(huán)境中使用,是室內短距無線接入的重要解決方案之一。在實際的網絡應用中,上行鏈路傳輸方案還面臨許多問題,無線局域網(如WiFi)提供了較大范圍的覆蓋區(qū)域,可有效補充VLC受視距傳輸(LOS)的限制。論文針對典型室內無線接入應用環(huán)境中的VLC+WiFi異構融合網絡進行了研究。論文首先簡述了VLC系統原理和關鍵技術,包括白光LED及其工作特性、室內信道傳輸特性等。然后詳細分析了基于VLC+WiFi協同的室內無線接入網,對雙向鏈路傳輸方案、組網方式及切換策略等進行了深入研究,分析得出了基于VLC和WiFi異構組網的切換策略以及布局方案。論文提出了一種等價信噪比切換算法。改進算法根據WiFi信噪比與VLC等價信噪比間的差值與設定切換門限的對比結果進行切換觸發(fā),使切換算法能精確感知并比較不同傳輸方式的性能;同時引入了駐網定時器機制,進行判決切換的短暫保持,以保證判決的準確性。論文最后針對可見光通信與無線局域網技術聯合光源端收發(fā)機和移動端收發(fā)機進行了設計,設計實現了Demo系統,實際切換測試驗證了設計方案的可行性。
[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.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN92;TN929.1

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