Real-time Demonstration of Software Reconfigurable Dynamic Power-and-subcarrier Allocation Scheme for OFDM-NOMA based Multi-user Visible Light Communications

Author(s):  
Jin Shi ◽  
Yang Hong ◽  
Rui Deng ◽  
Jing He ◽  
Lian-Kuan Chen ◽  
...  
2013 ◽  
Vol 25 (13) ◽  
pp. 1274-1277 ◽  
Author(s):  
Youngsuk Suh ◽  
Chang-Hoi Ahn ◽  
Jae Kyun Kwon

Author(s):  
Karunankitha Lega ◽  
Sai Naga Haneesh Sammeta ◽  
Divya Bollepally ◽  
Guru Kalyan Mallavarapu ◽  
Elizabeth Eso ◽  
...  

2014 ◽  
Vol 22 (3) ◽  
pp. 2830 ◽  
Author(s):  
Paul Anthony Haigh ◽  
Francesco Bausi ◽  
Zabih Ghassemlooy ◽  
Ioannis Papakonstantinou ◽  
Hoa Le Minh ◽  
...  

2018 ◽  
Vol 9 (1) ◽  
pp. 1 ◽  
Author(s):  
Yu Zuo ◽  
Jian Zhang

Visible light communications (VLCs) utilizing multi-color light-emitting diodes (LEDs) can achieve a high modulation bandwidth and high-quality illumination compared with phosphor-converted LEDs, which have attracted much attention. However, the spectrum overlapping of different colors may cause the crosstalk problem, which should be considered in the practical multi-color LED-based VLC systems. Due to the ever-increasing energy consumption, the interest in an energy-saving communication technique has further increased. In this paper, in order to maximize energy efficiency, an optimization problem of the optical power allocation scheme is formulated for the multi-color LED-based VLC systems under the necessary communication requirements and illumination constraints with luminance, chromaticity, and signal to interference plus noise ratio (SINR) constraints. Simulation results indicate that the proposed optimal power allocation scheme can reduce energy consumption while satisfying the illumination and communication requirements.


2013 ◽  
Vol 411-414 ◽  
pp. 819-822
Author(s):  
Kun Chen ◽  
Geng Chen ◽  
Ming Lun Zhang ◽  
Yan Gan Zhang

This paper introduces an integrated simulation system for visible light communications (VLC) which is based on DC-biased optical OFDM (DCO-OFDM). By simulating a VLC system with an equalizer, we optimize the parameters for a real-time system: the number of sub-channels and quantization bits. It could be concluded that a 128 sub-channels system is suitable when the signal bandwidth exceeds 100MHz and 6 quantization bits should be enough for a VLC system, which would be useful when it comes to a hardware only system.


2017 ◽  
Vol 9 (6) ◽  
pp. 1-9 ◽  
Author(s):  
Xiaoyan Liu ◽  
Pengfei Tian ◽  
Zixian Wei ◽  
Suyu Yi ◽  
Yuxin Huang ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document