Optimization of an Angle-Aided Mirror Diversity Receiver for Indoor MIMO-VLC Systems

Type
Conference Paper

Authors
Park, Kihong
Alouini, Mohamed-Slim

KAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program

Online Publication Date
2017-02-07

Print Publication Date
2016-12

Date
2017-02-07

Abstract
In this paper, we investigate the channel correlation problem which affects the performance of indoor multiple-input multiple-output (MIMO) visible light communication (VLC) systems. More specifically, in order to reduce the high correlation of channel matrix in MIMO-VLC intensity channel, we propose a non-imaging receiver called angle-aided mirror diversity receiver (AMDR) which utilizes not only a mirror placement but also a variation of orientation angle for the photodetector (PD) plane. Deploying a mirror helps reducing the correlation by blocking the reception of the light in one specific direction and by receiving additional light reflected in the mirror in another direction, while orienting the angle of PD plane into specific direction enables the directional reception of light. Applying a zero-forcing decorrelator at the receiver, we analyze the bit error rate (BER) performance for a 2×2 multiplexing MIMO-VLC system using a 2-dimensional geometric model. In particular, we formulate a min-max BER problem and find the optimal height of mirror and elevation angle of PD plane. Some selected numerical results validate our proposed optimal solution to our min-max BER problem and show that the BER performance of our proposed AMDR outperforms that of the previous non-imaging receivers.

Citation
Park K-H, Alouini M-S (2016) Optimization of an Angle-Aided Mirror Diversity Receiver for Indoor MIMO-VLC Systems. 2016 IEEE Global Communications Conference (GLOBECOM). Available: http://dx.doi.org/10.1109/glocom.2016.7842104.

Acknowledgements
The work of authors was a supported by the KACST Technology Innovation Center (TIC) for Solid State Lighting at KAUST.

Publisher
Institute of Electrical and Electronics Engineers (IEEE)

Journal
2016 IEEE Global Communications Conference (GLOBECOM)

DOI
10.1109/glocom.2016.7842104

Additional Links
http://ieeexplore.ieee.org/document/7842104/

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