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Chinese Optics Letters 2020年第11期18卷 32-37页

作者： Chaofan Wang Guoqiang Li Fangchen Hu Yiheng Zhao Junlian Jia Peng Zou Qiuyi Lu Jiang Chen Zhongya Li Nan Chi Academy for Engineering and Technology Shanghai Institute for Advanced Communication and Data ScienceKey Laboratory for Information Science of Electromagnetic Waves(MoE)Fudan UniversityShanghai 200433China

visible light communication(VLC) shows great potential in Internet of Vehicle applications. A single-input multi-output VLC system for Vehicle to Everything is proposed and demonstrated. A commercial car headlight is used as transmitter. With a self-designed 2 × 2 positive-intrinsic-negative(PIN) array, four independent signals are received and equalized by deep-neural-network post-equalizers, respectively. Maximum-ratio combining brings high signal-to-noise ratio and data rate gain. The transmission data rate reaches 1.25 Gb/s at 1 m and exceeds 1 Gb/s at 4 m. To the best of our knowledge, it is the first-time demonstration of beyond 1 Gb/s employing a commercial car headlight.

关键词： visible light communication Internet of Vehicle Vehicle to Everything single-input multi-output deep neural networks maximum-ratio combining

visible light communication system at 3.59 Gbit/s based on c-plane green micro-LED

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Chinese Optics Letters 2022年第11期20卷 14-19页

作者： Guoqiang Li Runze Lin Haichao Guo Pengfei Tian Nan Chi Department of communication Science and Engineering Institute for Electric Light SourcesKey Laboratory for Information Science of Electromagnetic Waves(MoE)School of Information Science and TechnologyFudan UniversityShanghai 200433China National Key Laboratory of Science and Technology on Space Microwave Xi’an 710100China China Academy of Space Technology(Xi’an) Xi’an 710100China

visible light communication(VLC)based on the micro light emitting diode(micro-LED)has attracted increasing attention owing to its high bandwidth,low power consumption,and high *** with semi-polar or non-polar micro-LEDs,the commercial polar micro-LED has the advantages of low cost and more mature epitaxy *** this study,green micro-LEDs with different indium tin oxide(ITO)sizes are fabricated based on the commercial c-plane LED epitaxial *** transmission performance of 80,100,and 150μm devices has been studied in detail.A partial pre-equalization scheme is utilized to increase data ***,the VLC system with a 100μm green micro-LED as the transmitter could achieve a maximum data rate of 3.59 Gbit/*** a result will be beneficial to promote the further development of low-cost,high-speed VLC devices in the future.

关键词： micro-LED visible light communication c-plane discrete multi-tone

AI based on frequency slicing deep neural network for underwater visible light communication

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Science China(Information Sciences) 2020年第6期63卷 47-54页

作者： Nan CHI Fangchen HU Guoqiang LI Chaofan WANG Wenqing NIU Key Laboratory for Information Science of Electromagnetic Waves (MoE) Fudan University

In this paper, we propose a low-complexity frequency slicing deep neural network(FSDNN) for wide-band signal post-equalization in a 1.2 m underwater visible light communication system. FSDNN and deep neural network(DNN) outperform the least mean square equalizer. Then, by splitting the received signal into two parallel signals using a digital low-pass filter and a high-pass filter, we demonstrate that the FSDNN significantly reduces the complexity of the traditional DNN post-equalizer. Moreover, the complexity of the FSDNN decreases considerably to 11.15% compared with the conventional DNN for a 2.7 Gbit/s wide-band transmitted signal with a similar bit error ratio performance.

关键词： deep neural network frequency slicing underwater visible light communication visible light communication

Support vector machine based machine learning method for GS 8QAM constellation classification in seamless integrated fiber and visible light communication system

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Science China(Information Sciences) 2020年第10期63卷 182-193页

作者： Wenqing NIU Yinaer HA Nan CHI Key Laboratory for Information Science of Electromagnetic Waves (MoE) Fudan University

visible light communication(VLC) network over optical fiber has become a potential candidate in ultra-high speed indoor wireless communication. To mitigate signal distortion accumulated in optical fiber and VLC channel, we present to utilize support vector machine(SVM) for constellation classification in two kinds of geometrically-shaped 8 QAM(quadrature amplitude modulation) seamless integrated fiber and VLC system. We introduce 4 sub-bands to simulate multi-user. Experimental results show that system performance can be significantly improved, and transmission at-2.5 dB m input optical power under 7%forward error correction(FEC) threshold can be realized employing Circular(7, 1) geometrically-shaped8 QAM and SVM. At overall capacity of 960 Mbps, Q-factor increases by up to 11.5 dB.

关键词： visible light communication VLC support vector machine SVM geometrically shaping GS VLC network constellation classification

Characteristic of Line-of-Sight in Infrastructure-to-Vehicle visible light communication Using MIMO Technique

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Computers, Materials & Continua 2023年第1期74卷 1025-1048页

作者： Adisorn Kaewpukdee Peerapong Uthansakul School of Telecommunication Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand

visible light communication(VLC)technology is aggressive research for the next generation of ***,Radio Frequency(RF)communication has crowed *** Intelligent Transportation System(ITS)has been improved in the communication network for Vehicle-to-Vehicle(V2 V),Vehicle-to-Infrastructure(V2I),and Infrastructure-to-Vehicle(I2V)by using the visible light spectrum instead of the RF *** article studies the characterization of Line-of-Sight(LOS)optical performance in an Outdoor Wireless visible light communication(OWVLC)system employing a Multiple-Input Multiple-Output(MIMO)technique for I2V communications in ITS *** design the new configuration of the OWVLC-I2V system,which is an alternative approach to communication for I2V system at *** results show the Channel Impulse Response(CIR)of the LOS links in visible light communication for I2V system in ITS by investigating the receiver on the vehicle moving along the coverage communication ***,the OWVLC-I2V system using the MIMO technique depicts the performance of throughput and Bit Error Rate(BER)*** speed while the vehicle passes a street light.

关键词： Infrastructure to vehicle communication intelligent transportation system visible light communication channel impulse response

The Research of Indoor Positioning Based on visible light communication

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China communications 2015年第8期12卷 85-92页

作者： WANG Chunyue WANG Lang CHI Xuefen LIU Shuangxing SHI Wenxiao DENG Jing College of communication Engineering Jilin University University of North Carolina at Greensboro

The key techniques in indoor positioning based on visible light communication and the state of the art of this research were surveyed. First, the significance of indoor positioning based on visible light communication from two aspects of the limitations of current indoor positioning technology and the advantages of visible light communication was discussed; And then, the main four technology of indoor positioning based on visible light communication were summarized and the triangulation of RSS method and the principle of image positioning were introduced in detail; Next, the performance characteristics of various typical algorithms were compared and analyzed; In the end, several suggestions on future research of indoor positioning based on visible light communication were given.

关键词： visible light communication indoor positioning imaging positioning RSS

Adaptive frequency domain pre-equalization for white-LED nonlinearity in OFDM-based visible light communication systems

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Chinese Optics Letters 2015年第7期13卷 101-104页

作者：张汝岐李建锋黄治同纪越峰 State Key Laboratory of Information Photonics and Optical communications Beijing University of Posts and Telecommunications

In visible light communication, orthogonal frequency division multiplexing （OFDM） is an effective approach to improve the system speed. However, the nonlinearity of the light-emitting diode （LED） suppresses the trans- mission performance. The low-frequency part of the transmitted signal from LED suffers more from nonlinearity. Therefore, a pre-equalization scheme which suppresses the low frequency part of the OFDM signal and enhances the high frequency part can decrease the impact of LED nonlinearity. The experimental results show that the bit-error rate performance is largely enhanced by the pre-compensation.

关键词： Bit error rate Error compensation Frequency division multiplexing Frequency domain analysis light Optical communication Orthogonal frequency division multiplexing visible light communication

Channel Capacity and Power Allocation of MIMO visible light communication System

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China communications 2023年第2期20卷 122-138页

作者： Shuai Ma Ruixin Yang Guanjie Zhang Hang Li Wen Cao Linqiong Jia Yanyu Zhang Shiyin Li Peng Cheng Laboratory Shenzhen 518055China School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China Shenzhen Research Institute of Big Data Shenzhen 518172China School of Electronics and Control Engineering Chang’an UniversityXi’an 710064China School of Electronic and Optical Engineering Nanjing University of Science and TechnologyNanjing 210094China National Digital Switching System Engineering&Technological Research Center Zhengzhou 450000China

In this paper,the channel capacity of the multiple-input multiple-output(MIMO)visible light communication(VLC)system is investigated under the peak,average optical and electrical power *** the channel capacity of MIMO VLC is shown to be a mixed integer programming *** address this open problem,we propose an inexact gradient projection method to find the channel capacity-achieving discrete input distribution and the channel capacity of MIMO *** we derive both upper and lower bounds of the capacity of MIMO VLC with the closed-form ***,by considering practical discrete constellation inputs,we develop the optimal power allocation scheme to maximize transmission rate of MIMO VLC *** results show that more discrete points are needed to achieve the channel capacity as SNR *** the upper and lower bounds of channel capacity are tight at low SNR *** addition,comparing the equal power allocation,the proposed power allocation scheme can significantly increase the rate for the low-order modulation inputs.

关键词： visible light communication MIMO discrete constellation inputs power allocation

Switched-Beam Optimization for an Indoor visible light communication Using Genetic Algorithm

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Computers, Materials & Continua 2022年第4期71卷 1547-1566页

作者： Ladathunya Pumkaew Monthippa Uthansakul Peerapong Uthansakul School of Telecommunication Engineering Institute of EngineeringSuranaree University of TechnologyNakhon Ratchasima30000Thailand

Nowadays, visible light communication (VLC) is an attractivealternative technology for wireless communication because it can use somesimple light Emitting Diodes (LEDs) instead of antennas. Typically, indoorVLC is designed to transmit only one dataset through multiple LED beams at atime. As a result, the number of users per unit of time (throughput) is relativelylow. Therefore, this paper proposes the design of an indoor VLC system usingswitched-beam technique through computer simulation. The LED lamps aredesigned to be arranged in a circular array and the signal can be transmittedthrough the beam of each LED lamp with the method of separating the datasetto increase the number of simultaneous users for enhancing the indoor *** coverage area is determined from the area where the communication canbe performed at a location on the receiving plane with a Bit Error Rate lessthan or equal to the specified value based on coverage illuminance accordingto International Commission on Illumination (CIE) standards. In this paper,Genetic Algorithm is used to find the suitable solution for designing parameters to achieve maximum coverage area. The results show that a GeneticAlgorithm can be used to find a suitable solution and reduce the computationaltime approximately 382 min in proposed scenarios.

关键词： visible light communication genetic algorithm optimization light emitting diode

Robust Artificial Noise-Aided Beamforming for A Secure MISO-NOMA visible light communication System

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China communications 2020年第11期17卷 42-53页

作者： Xiaodong Liu Zezong Chen Yuhao Wang Fuhui Zhou Shuai Ma School of Electronic Information Wuhan UniversityWuhan 430072China School of Information Engineering Nanchang UniversityNanchang 330031China College of Electronic and Information Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210000China School of Information and Control Engineering China University of Mining and TechnologyXuzhou 221116China Shanxi Key Laboratory of Information communication Network and Security Xi’an University of Posts&TelecommunicationsXi’an 710121China

visible light communication(VLC)and non-orthogonal multiple access(NOMA)have been deemed two promising techniques in the next wireless communication *** this paper,secure communications in the presence of potential eavesdropper are investigated for a multiple-input single-output VLC system with *** artificial noise jamming and beamforming technologies are applied to improve secure performance.A robust resource allocation scheme is proposed to minimize the total transmit power taking into account the constraints on the quality of service requirement of the desired users and the maximum tolerable data rate of the eavesdropper,and the practical imperfect channel state information of both the desired users and the *** formulated non-convex optimization problem is tackled based onS-Procedure and semi-definite programming *** results illustrate that our proposed resource allocation scheme can effectively guarantee communication security and achieve transmit power ***,the height and number of LED can significantly affect system performance and the optimum LED height can be obtained for different LED numbers.

关键词： artificial noise non-orthogonal multiple access physical-layer secrecy robust resource allocation visible light communication