Rolling-Shutter-Based QPSK by Spatial Luminance Distribution for Optical Camera Communication
Rolling-Shutter-Based QPSK by Spatial Luminance Distribution for Optical Camera Communication
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DOI：
10.1109/glocomw.2018.8644404
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
W. Chujo;M. Kinoshita
中科院分区：
文献类型：
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作者：
W. Chujo;M. Kinoshita
提出并实验研究了通过LED照明的空间亮度分布进行多级相位和幅度调制以增加光学相机通信（OCC）的每个符号的比特数。首先，256正交幅度调制（QAM）和64-QAM正交频分复用（OFDM）的实验证明了二维LED图像的空间亮度分布。当符号率低于帧速率时，使用具有256 QAM和64-QAM OFDM的30帧每秒（fps）图像传感器分别实现80和78.5比特每秒（bps）。接下来，滚动快门为基础的正交相移键控（QPSK）的实验证明，通过适应的空间亮度分布的LED图像的滚动快门的每一行，以增加OCC的符号率。当符号速率比帧速率快得多时，使用基于滚动快门的QPSK的30-fps图像传感器实现2657-bps无差错传输。
Multilevel phase and amplitude modulation by spatial luminance distribution of an LED lighting is proposed and experimentally investigated to increase number of bits per symbol for optical camera communication (OCC). First, 256 quadrature amplitude modulation (QAM) and 64-QAM orthogonal frequency division multiplexing (OFDM) are experimentally demonstrated by spatial luminance distribution of two-dimensional LED image. When the symbol rate is lower than the frame rate, 80 and 78.5 bits per second (bps) is achieved using 30-frame-per-second (fps) image sensor with 256 QAM and 64-QAM OFDM, respectively. Next, rolling-shutter-based quadrature phase shift keying (QPSK) is experimentally demonstrated by adaptation of spatial luminance distribution of the LED image to each line of the rolling shutter to increase the symbol rate for OCC. When the symbol rate is much faster than the frame rate, 2657-bps error-free transmission is achieved using 30-fps image sensor with rolling-shutter-based QPSK.