過去的十年間,多媒體設備的更新?lián)Q代促進著室內(nèi)無線通信技術(shù)的發(fā)展。自2013以來,Wi-Fi(無線保真)連接技術(shù)迅猛發(fā)展,每天有超過50億臺的設備連接到了 Wi-Fi,致使系統(tǒng)嚴重超負荷運行。大量的無線設備使用會導致無線電頻譜的過度消耗。目前的無線通信標準將無法滿足未來十年室內(nèi)無線通信流量的巨大需求。如今,Wi-Fi占據(jù)著全球60%的流量,物聯(lián)網(wǎng)通信安全和頻譜擁擠將會是未來通信發(fā)展所面臨的兩大挑戰(zhàn)。因此,我們迫切需要一種經(jīng)濟、安全面快速的無線通信媒介。值得引人注意的是,可見光通信所提供的頻譜可以是無線電頻譜的幾千倍。利用可見光進行室內(nèi)通信,可以解決頻譜擁擠的挑戰(zhàn)和對高速傳播媒介的需求。實踐證明,通過可見光通信方式可以使得用戶在網(wǎng)絡擁擠的情況下依然能達到數(shù)百MB的數(shù)據(jù)傳播速率。德國物理學家Harald Haas教授引入了一種新的技術(shù),稱之可見光無線通信(Li-Fi)。Li-Fi(光照上網(wǎng)技術(shù))是一種無線通信系統(tǒng),利用可見光代替?zhèn)鹘y(tǒng)的無線射頻Wi-Fi作為信號載體。Li-Fi是一種利用發(fā)光二極管無線傳輸數(shù)據(jù)的技術(shù)。Li-Fi目前也是最具前景的一項技術(shù)之一,它能實現(xiàn)高速率和高容量地進行通信。這與...

【文章頁數(shù)】：116 頁

【學位級別】：博士

【文章目錄】：
摘要
ABSTRACT
List of Notations
Chapter 1 Introduction
    1.1 Overview
    1.2 Radio Frequency Communication
    1.3 Optical Communication
    1.4 Hybrid System
    1.5 Statement of Problem
        1.5.1 Problem 1
        1.5.2 Problem 2
    1.6 Statement of Purpose
        1.6.1 Methodology
        1.6.2 Contribution
        1.6.3 Optiwave System Tool
        1.6.4 Modeling and Experiments
        1.6.5 Limitations
    1.7 Dissertation Outline
Chapter 2 Indoor Visible Light Communication
    2.1 Overview
    2.2 Background
    2.3 VLC for Indoor Communication
    2.4 Opportunities and Limitations
        2.4.1 Applications
        2.4.2 Limitations
    2.5 Light Fidelity and Wireless Fidelity Comparison
    2.6 Summary
Chapter 3 Radio-over-Fiber System
    3.1 Overview
        3.1.1 Direct Modulation
        3.1.2 External Modulation
    3.2 Radio over Fiber Link Configuration
        3.2.1 Radio Frequency over Fiber
        3.2.2 Intermediate Frequency over Fiber
        3.2.3 Baseband over Fiber
        3.2.4 Millimetre-wave Signal Generation
        3.2.5 Applications
    3.3 Radio over Fiber System-level Analysis
        3.3.1 Encoding Formats
        3.3.2 PIN and APD Photodiodes
    3.4 Simulation
        3.4.1 Conclusion
    3.5 Future Multifunctional RoF Home Network
        3.5.1 Fiber to the Home (FTTH)
        3.5.2 Multi frequency RoF System Design
    3.6 Summary
Chapter 4 Digital Coherent Integration with Radio over Fiber
    4.1 Digital Coherent System Analysis
        4.1.1 DP-QPSK Transmitter
        4.1.2 Digital Coherent Optical Receiver
        4.1.3 Optical Integration Technology
        4.1.4 Digital Signal Processing in a Coherent Receiver
    4.2 Software Implementation
    4.3 Digital Coherent RoF System Analysis
        4.3.1 Proposed System Design and Analysis
        4.3.2 Simulation
    4.4 Summary
Chapter 5 Proposed Hybrid System for Indoor VLC
    5.1 Overview
        5.1.1 Backhaul Connection
        5.1.2 Uplink Connectivity
    5.2 Proposed System Design
        5.2.1 OFDM Coherent RoF
        5.2.2 Modeling in OptiSystem 15
    5.3 Proposed Auto Channel Switching Unit (ACSU)
        5.3.1 Modeling of the Auto Channel Switching Unit (ACSU)
    5.4 Feasibility Analysis
        5.4.1 Technical Feasibility
        5.4.2 Cost Benefits Analysis
    5.5 Summary
Chapter 6 Proposed Indoor Hybrid System Modeling
    6.1 Modeling of Indoor Hybrid System for VLC
    6.2 VLC and RoF Indoor Downloading
    6.3 Wi-Fi and RoF for Indoor Purposes
    6.4 Summary
Chapter 7 Conclusion and Future Work
    7.1 Conclusion
    7.2 Future Work
References
Acknowledgement
Publications
    Book Chapter
    Peer Reviewed Journals
    IEEE Proceedings



本文編號：4017898