Experimental demonstration of indoor interfered visible light communication system employing successive interference cancellation

Miaofeng Li; Xiang Li; Chao Yang; Qi Yang; Shaohua Yu

doi:10.3788/COL201715.050604

Journals >Chinese Optics Letters >Volume 15 >Issue 5 >Page 050604 > Article

Chinese Optics Letters
Vol. 15, Issue 5, 050604 (2017)

Experimental demonstration of indoor interfered visible light communication system employing successive interference cancellation

Miaofeng Li^1、2, Xiang Li^2、*, Chao Yang², Qi Yang², and Shaohua Yu^1、2

Author Affiliations

¹Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China

²State Key Laboratory of Optical Communication Technologies and Networks, Wuhan Research Institute of Posts Telecommunications, Wuhan 430074, China

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DOI: 10.3788/COL201715.050604 Cite this Article Set citation alerts

Miaofeng Li, Xiang Li, Chao Yang, Qi Yang, Shaohua Yu. Experimental demonstration of indoor interfered visible light communication system employing successive interference cancellation[J]. Chinese Optics Letters, 2017, 15(5): 050604 Copy Citation Text

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Abstract

Multipath interference induced power fading occurs when the transmission path lengths from the light emitting diodes to a single receiver are different in a visible light communication system. To solve this problem, we apply a QR-decomposition-based channel equalizer (QR-CE) to achieve successive interference cancellation for a discrete Fourier transform spreading (DFT-S) orthogonal frequency division multiplexing (OFDM) signal. We experimentally demonstrate a 200 Mb/s DFT-S OFDM over a 2 m free-space transmission. The experimental results show that a DFT-S OFDM with QR-CE attains much better bit error rate performance than a DFT-S OFDM with conventional CEs. The impacts of several parameters on a QR-CE are also investigated.