Chinese Optics Letters, 2017, 15 (3): 030602, Published Online: Jul. 25, 2018
Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme Download: 1052次
Abstract
In this Letter, we propose a novel constellation-shaping carrier-less amplitude and phase (CAP) modulation scheme to alleviate the systematic nonlinearity in visible light communication (VLC) systems. A simple geometric transformation shaping method is employed to convert the normal square lattice constellation into multiple circular constellations. The feasibility and performance are investigated and experimentally demonstrated by a 1.25 Gb/s CAP-modulated VLC system. The results indicate that the circular constellation has better resistance to systematic nonlinearity compared with a rectangular constellation. The dynamic range of input signal peak-to-peak values promotes 20% at a low bias voltage nonlinear area and 50% at a high bias voltage nonlinear area. To the best of our knowledge, this is the first time constellation-shaping CAP has ever been reported in indoor high data rate VLC systems.
Zhixin Wang, Mengjie Zhang, Siyuan Chen, Nan Chi. Carrier-less amplitude and phase modulated visible light communication system based on a constellation-shaping scheme[J]. Chinese Optics Letters, 2017, 15(3): 030602.