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Last Mile Internet Access for Emerging Economies pp 109–142Cite as

A Theoretical Analysis of Li-Fi: A Last Mile Solution

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Part of the book series: Lecture Notes in Networks and Systems ((LNNS,volume 77))

Abstract

A last mile technology that is identified to potentially relieve the digital divide in emerging markets, and especially relevant in rural communities, is light fidelity (Li-Fi). Li-Fi can take advantage of current infrastructures (lighting) to distribute the internet to local communities in these areas. Li-Fi last mile solutions do not require large investments in implementing traditional infrastructures such as fibre or copper which are challenging, expensive or unpractical in these areas. Li-Fi uses light in the visible spectrum and propagates through free space—two important factors when considering an infrastructure that already exists in many rural communities. Information can be modulated onto these light signals (carriers) and be detected and demodulated with photodetectors. Since the (carrier) frequency of the light signal is very high (in the THz range), there are little bandwidth limitations when transmitting information using light, a distinct advantage of Li-Fi that offers numerous benefits. The principles of operation (including an introduction into Li-Fi channel modelling), benefits and limitations, as well as potential Li-Fi applications, are researched in this chapter and delivered to the reader as methodological principles of light-based communications.

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Author information

Authors and Affiliations

  1. University of Johannesburg, Johannesburg, South Africa

    Wynand Lambrechts

  2. Faculty of Engineering and the Built Environment, University of Johannesburg, Johannesburg, South Africa

    Saurabh Sinha

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  1. Wynand Lambrechts
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  2. Saurabh Sinha
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Correspondence to Wynand Lambrechts .

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Lambrechts, W., Sinha, S. (2019). A Theoretical Analysis of Li-Fi: A Last Mile Solution. In: Last Mile Internet Access for Emerging Economies. Lecture Notes in Networks and Systems, vol 77. Springer, Cham. https://doi.org/10.1007/978-3-030-20957-5_4

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  • DOI: https://doi.org/10.1007/978-3-030-20957-5_4

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-20956-8

  • Online ISBN: 978-3-030-20957-5

  • eBook Packages: EngineeringEngineering (R0)

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