Realization of OFDM modulation and demodulation for visible light communication based on FPGA

2017 ◽  
Vol 13 (1) ◽  
pp. 58-62 ◽  
Author(s):  
Chun-hui Wu ◽  
Zong-yu Gao ◽  
Hong-lei Li ◽  
Xiong-bin Chen ◽  
Xu-rui Mao ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Modulation And Demodulation ◽  
Ofdm Modulation

scholarly journals 5G Visible Light Communication - OCDMA Setup using Catenated-OFDM Modulation Method

2021 ◽  
Vol 1755 (1) ◽  
pp. 012016
Author(s):  
N. M. Nawawi ◽  
S. R. Abdullah ◽  
Aini Syuhada Md Zain ◽  
M. S. Anuar ◽  
M. N. Junita
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Modulation Method ◽  
Ofdm Modulation

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.

scholarly journals Achievable information rate enhancement of visible light communication using probabilistically shaped OFDM modulation

2018 ◽  
Vol 26 (1) ◽  
pp. 367 ◽  
Author(s):  
Chenhui Xie ◽  
Zexin Chen ◽  
Songnian Fu ◽  
Wu Liu ◽  
Zhixue He ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Communication ◽  
Information Rate ◽  
Rate Enhancement ◽  
Ofdm Modulation

scholarly journals The Detection and Recognition of RGB-LED-ID Based on Visible Light Communication using Convolutional Neural Network

2019 ◽  
Vol 9 (7) ◽  
pp. 1400 ◽  
Author(s):  
Weipeng Guan ◽  
Jingyi Li ◽  
Shangsheng Wen ◽  
Xinjie Zhang ◽  
Yufeng Ye ◽  
...  
Keyword(s):  
Neural Network ◽  
Visible Light ◽  
Pulse Width Modulation ◽  
Light Emitting Diode ◽  
Complementary Metal Oxide Semiconductor ◽  
Visible Light Communication ◽  
Image Sensor ◽  
Oxide Semiconductor ◽  
Light Emitting ◽  
Modulation And Demodulation

In this paper, an online to offline (O2O) method based on visible light communication (VLC) is proposed, which is different from the traditional VLC with modulation and demodulation. It is a new VLC with modulation and recognition. We use RGB light emitting diode (RGB-LED) as the transmitter, and use Pulse Width Modulation (PWM) to modulate the signal to make it flicker at high frequency. Therefore, several features are created. At the receiver, the complementary metal-oxide-semiconductor (CMOS) image sensor is applied to our system to capture LED images with stripes. A convolution neural network (CNN) is then introduced in our system as a classifier. By offline training for the classifiers and online recognition of LED-ID, the scheme proposed could improve the speed of LED-ID (the unique identification of each different LED) identification and improve the robustness of the system. This is the first application of CNN in the field of VLC.

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.

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