Memory-Based Codes for Uniform Illumination in MIMO VLC

Uday, Thummaluri and Kumar, Abhinav and Natarajan, Lakshmi (2020) Memory-Based Codes for Uniform Illumination in MIMO VLC. IEEE Photonics Journal, 12 (2). pp. 1-15. ISSN 1943-0647

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Light emitting diode (LED) based indoor multiple input multiple output visible light communication system has LEDs placed at various positions in the room which are simultaneously used for illumination and communications. In such a system, there should be no human perceivable fluctuations in the intensity of the individual LEDs to avoid user discomfort. In order to achieve the uniformity in illumination, we propose codes under the constraints of constant total transmit power per symbol and constant average transmit power for each individual LED. We show the performance of the proposed codes in terms of various metrics like bit error rate (BER), consistency in illumination, and spectral efficiency with suitable expressions. We also numerically analyze the impact of channel state information (CSI) on BER performance by assuming perfect CSI is not always available but periodically updated at the receiver.

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IITH Creators:
IITH CreatorsORCiD
Natarajan, Lakshmi Prasad
Item Type: Article
Uncontrolled Keywords: Bit error rate; multiple input multiple output; spectral efficiency; visible light communications
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 06 Jul 2021 09:51
Last Modified: 11 Mar 2022 06:18
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