scholarly journals Advanced Modulation Format of Probabilistic Shaping Bit Loading for 450-nm GaN Laser Diode based Visible Light Communication

Sensors ◽  
2020 ◽  
Vol 20 (21) ◽  
pp. 6143
Author(s):  
Guoqiang Li ◽  
Fangchen Hu ◽  
Peng Zou ◽  
Chaofan Wang ◽  
Gong-Ru Lin ◽  
...  
Keyword(s):  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Visible Light Communication ◽  
System Capacity ◽  
High Data ◽  
Modulation Format ◽  
Bit Loading ◽  
Power Loading

Visible light communication is an emerging high-speed optical wireless communication technology that can be a candidate to alleviate pressure on conventional radio frequency-based technology. In this paper, for the first time, the advanced modulation format of probabilistic shaping (PS) bit loading is investigated in a high data rate visible light communication system based on a 450-nm Gallium Nitride laser diode. The characteristic of the system is discussed and PS bit loading discrete multi-tone modulation helps to raise the spectral efficiency and improve the system performance. Higher entropy can be achieved in the same signal-to-noise ratio (SNR) and modulation bandwidth limitation, comparing to bit and power loading. With PS bit loading, an available information rate (AIR) of 10.23 Gbps is successfully achieved at the signal bandwidth of 1.5 GHz in a 1.2 m free space transmission with normalized generalized mutual information above 0.92. And higher AIR can be anticipated with an entropy-loading strategy that fixes the channel characteristic. Experimental results validate that a PS bit loading scheme has the potential to increase the system capacity.

Modulation and Demodulation Techniques in Indoor Visible Light Communication System

2014 ◽  
Vol 685 ◽  
pp. 306-309
Author(s):  
Hao Wang ◽  
Ze Yu Han
Keyword(s):  
Visible Light ◽  
Communication Technology ◽  
Communication System ◽  
High Speed ◽  
Data Transfer ◽  
Visible Light Communication ◽  
Communication Link ◽  
High Data ◽  
Modulation And Demodulation ◽  
The Impact

Visible light communication technology is a emerging wireless and optical communication technology developed after invention and application of white LED.In this paper, we have a research based on indoor visible light communication system of lighting white LED,discuss of the visible light communication channel characteristics,detailedly analysis of the indoor visible light communication link. This paper focuses on the modulation and demodulation method applied to visible light communication. In the past visible light communication is mainly used off keying modulation,however, the data transfer speed is limited due to the influence of ISI .This paper presents a solution based on OFDM modulation and demodulation, to reduce the impact brought from inter-symbol string under high data transfer speed.Based on data analysis and computer simulation,the program presented in this paper can be used as indoor lighting and high-speed data transmission.Finally, give scheme to achieve visible light communication modulation and demodulation,provide a theoretical basis for further experiments.

Laser Diode-Based High Speed Visible Light Communication Using DMT-OOFDM

2013 ◽  
Author(s):  
rong hu ◽  
Chao Yang ◽  
Xiao Xiao ◽  
Daojun Xue ◽  
Qi Yang ◽  
...  
Keyword(s):  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Visible Light Communication

Blue-laser-diode–based high CRI lighting and high-speed visible light communication using narrowband green-/red-emitting composite phosphor film

2020 ◽  
Vol 59 (17) ◽  
pp. 5197 ◽  
Author(s):  
Amjad Ali ◽  
Riffat Tehseen ◽  
K. M. Mithilesh ◽  
Chao Zhang ◽  
S. A. Hassnain ◽  
...  
Keyword(s):  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Visible Light Communication ◽  
Blue Laser ◽  
Blue Laser Diode ◽  
Phosphor Film

scholarly journals 450-nm GaN laser diode enables high-speed visible light communication with 9-Gbps QAM-OFDM

2015 ◽  
Vol 23 (10) ◽  
pp. 13051 ◽  
Author(s):  
Yu-Chieh Chi ◽  
Dan-Hua Hsieh ◽  
Cheng-Ting Tsai ◽  
Hsiang-Yu Chen ◽  
Hao-Chung Kuo ◽  
...  
Keyword(s):  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Visible Light Communication

scholarly journals Experimental Investigation of Zadoff-Chu Matrix Precoding for Visible Light Communication System with OFDM Modulation

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Xinyue Guo ◽  
Yang Guo ◽  
Shuangshuang Li
Keyword(s):  
Visible Light ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Forward Error Correction ◽  
Signal To Noise Ratio ◽  
Light Emitting Diode ◽  
Average Power ◽  
Visible Light Communication ◽  
Potential Candidate ◽  
Ofdm Modulation

Light-emitting diode- (LED-) based visible light communication (VLC) has become a potential candidate for next generation high-speed indoor wireless communication. Due to the limited modulation bandwidth of the LED, orthogonal frequency division multiplexing (OFDM) modulation is particularly preferred in the VLC system to overcome the ISI, which suffers from the high peak-to-average power ratio (PAPR) and leads to severe performance loss. In this paper, we propose and experimentally demonstrate a novel Zadoff-Chu matrix (ZCM) precoding scheme, which can not only reduce the PAPR, but also provide uniform signal-to-noise ratio (SNR) profile. The theoretical analysis and simulation show that the proposed scheme achieves better PAPR performance compared with the traditional precoding schemes. The experimental demonstration further validates the bit error rate (BER) performance improvement, where the measured BERs are all below the 7% pre-forward error correction (pre-FEC) limit of 3.8 × 10−3 when the transmitted data rate is 50 Mb/s.

scholarly journals AlGaInN laser diode technology for GHz high-speed visible light communication through plastic optical fiber and water

2016 ◽  
Vol 55 (2) ◽  
pp. 026112 ◽  
Author(s):  
Stephen P. Najda ◽  
Piotr Perlin ◽  
Tadek Suski ◽  
Lucja Marona ◽  
Mike Leszczynski ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Visible Light Communication ◽  
Plastic Optical Fiber

scholarly journals Blue Laser Diode-Based Visible Light Communication and Solid-State Lighting

2021 ◽  
Author(s):  
Amjad Ali ◽  
Qian Li ◽  
Hongyan Fu ◽  
Syed Raza Mehdi
Keyword(s):  
Solid State ◽  
Visible Light ◽  
Laser Diode ◽  
High Speed ◽  
Visible Light Communication ◽  
Blue Laser ◽  
Solid State Lighting ◽  
High Quality ◽  
Light Emitting ◽  
Blue Laser Diode

In this chapter, we review our recent work on blue laser diode-based visible light communication and solid-state lighting. Gallium nitride (GaN) phosphor-converted white light-emitting diodes (Pc-WLEDs) are emerging as an indispensable solid-state lighting (SSL) source for next-generation display system and the lighting industry. Together with the function of lighting, visible light communication (VLC) using Pc-WLEDs has gained increasing attention to fulfill the growing demand for wireless data communication. Practically, the low modulation response and low emitting intensity of light-emitting diodes (LED) are the drawbacks for the development of ultrahigh-speed VLC and high-quality SSL system. Blue GaN laser diode (LD) and remote phosphor-based white light can be used for both high-speed VLC and SSL simultaneously. We demonstrated a color-rendering index (CRI) of 93.8, a correlated color temperature (CCT) of 4435 K, and a data rate of 1.6 Gbps under NRZ-OOK modulation by an exciting blue laser diode on narrowband green−/red-emitting composite phosphor film. This work opens up exciting possibilities for future high-speed indoor VLC and high-quality SSL.

Sign in / Sign up

Export Citation Format

Share Document