Cooperative linear precoding for multi-user MISO visible light communications

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hdl:2117/114640
Document typeConference report
Defense date2017
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
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Abstract
This paper develops and evaluates precoding techniques
for coordinated joint transmission in visible light communications
(VLC). A multi-user multiple-input single-output (MISO) setup is adopted. Transmitters are equipped with light emitting diode (LED) arrays, while receivers incorporate a single photodetector (PD). We design zero forcing (ZF) linear precoders considering, as figure of merit, the weighted sumrate for multilevel pulse amplitude modulation (PAM) and take into account the optical power constraints. We present
two approaches. First, we formulate the design as a convex
optimization problem and find its exact solution. Second, by considering
certain approximations, we find an alternative precoder
that despite being suboptimal can be computed in an almost
closed-form, achieving a good trade-off between performance
and complexity. Finally, we demonstrate that the proposed
approaches largely outperform the conventional pseudo-inverse
precoding and single-user TDMA approaches
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CitationViñals, R., Muñoz, O., Agustin, A., Vidal, J. Cooperative linear precoding for multi-user MISO visible light communications. A: IEEE Global Communications Conference. "2017 IEEE Global Communications Conference (GLOBECOM): proceedings: Singapore: 4-8 December 2017". Singapur: Institute of Electrical and Electronics Engineers (IEEE), 2017.
ISBN978-1-5090-5019-2
Publisher versionhttp://ieeexplore.ieee.org/document/8254780/
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