Article
Computer Science, Information Systems
Selma Yahia, Yassine Meraihi, Amar Ramdane-Cherif, Asma Benmessaoud Gabis, Hossein B. Eldeeb
Summary: This paper fills the research gap regarding the impact of lateral shift between vehicles and transceiver parameters on the performance of V2V-VLC systems. It also introduces the use of angle-oriented receiver to enhance system performance.
COMPUTER COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Catalin Beguni, Alin-Mihai Cailean, Sebastian-Andrei Avatamanitei, Mihai Dimian
Summary: The use of Visible Light Communications (VLC) in vehicular applications is a major research area due to its simplicity and high performance. This article provides analysis and experimental evaluations on integrating light dimming function in vehicular VLC systems, showing the potential of VLC technology to support inter-vehicle communication links even in light dimming conditions.
Article
Computer Science, Hardware & Architecture
Paa Kwesi Esubonteng, Roberto Rojas-Cessa
Summary: In this paper, a model of the coverage and achievable data rates in No Line-of-Sight Free-Space Optical Communications (NLOS-FSOC) is proposed as a function of the angle of incidence. This model focuses on an outdoor urban setting where mobile stations, represented by cars, travel through a city street. The results of extensive numerical evaluations show the effect of the incidence angle on the coverage, achievable data rates, and optimal placement and orientation of the DR and ground optical base stations in an NLOS-FSOC OLAN.
Article
Engineering, Electrical & Electronic
Arbaiah Inn, Rosilah Hassan, Mohammad Kamrul Hasan, Liza Abdul Latiff, Mohamed Deriche
Summary: This letter presents an optimal arrangement of LED for indoor VLC setup using a simulation model. The aim is to maximize the angle of coverage for the LED as an access point to maintain connectivity during user mobility. The analysis of data rate measurement is discussed by rotating the LED's angle as an access point. The validation simulation results for a Line-of-Sight configuration demonstrate efficient angle change movement and suggest that transmitter directivity can expand the coverage area and user mobility.
ELECTRONICS LETTERS
(2023)
Article
Computer Science, Information Systems
Lin Cheng, Yue Wu, Chenren Xu, Khadija Ashraf, Ashwin Ashok
Summary: Continuous advancements in VLC technology have opened up possibilities for high-capacity communication links that combine data transmission and illumination. VLC is seen as a potential complementary technology in 5G networks, with ongoing standardization efforts through IEEE 802.15.7. This article discusses three alternatives for vehicular networking applications, including LED-photodiode-based active VLC, VLC with a multicamera array receiver, and passive VLC based on optical backscatter decoding. Experimental and modeling work using camera-based and passive VLC prototypes are also presented.
TSINGHUA SCIENCE AND TECHNOLOGY
(2023)
Article
Optics
Jinfeng Xu, Haozhe Li, Wenhong Lv, Fang Kong, Xiaoqing Li, Guoqing Li, Qi Li, Yinjing Guo
Summary: A polarization navigation sensor based on a differential amplifier is designed in this study to address the issues of zero drift and low detection accuracy in existing sensors. The algorithm for calculating the sensor's heading angle is also improved based on the change of the arithmetic unit of the polarization signal. The experimental results show that the designed sensor has an orientation error of +/- 1.243 degrees and a standard deviation of 0.351 degrees in clear weather. This polarization navigation sensor accurately extracts polarized light information, achieves error-free accumulation over time, and has good real-time performance.
Article
Chemistry, Analytical
Catalin Beguni, Alin-Mihai Cailean, Sebastian-Andrei Avatamanitei, Eduard Zadobrischi, Raul Stoler, Mihai Dimian, Valentin Popa, Bastien Bechadergue, Luc Chassagne
Summary: This article presents a new in-vehicle visible light communication system that provides car passengers with optical wireless communication. The proposed system includes a visible light communication emitter integrated into the vehicle's ambient lighting system and a mobile receiver. The experimental evaluation demonstrated the feasibility and effectiveness of the system, achieving a data rate of 250 kb/s with a BER lower than 10(-7).
Article
Computer Science, Information Systems
Jiancun Fan, Yong Ban, Jie Luo, Ying Zhang, Xinmin Luo
Summary: A spectrum sensing scheme based on angle reciprocity is proposed in this study, utilizing the narrow characteristic of the satellite beam to control reciprocity between the central angle of the known beam and the arrival angle of the unknown signal, resulting in improved satellite spectral sensing performance.
SCIENCE CHINA-INFORMATION SCIENCES
(2021)
Article
Computer Science, Information Systems
Mohammad Amir Dastgheib, Elahe Zolala, Hamzeh Beyranvand, Jawad A. Salehi
Summary: This letter investigates the fundamental limits of energy efficiency in Visible Light Communication systems and proposes energy-efficient signaling schemes, achieving significant improvements in energy efficiency.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2023)
Review
Computer Science, Hardware & Architecture
Selma Yahia, Yassine Meraihi, Amar Ramdane-Cherif, Asma Benmessaoud Gabis, Dalila Acheli, Hongyu Guan
Summary: This paper provides a comprehensive survey of VLC channel modeling techniques, describing the main components and different channel models in various environments, comparing algorithms proposed in each environment, and giving concluding remarks and future research directions for VLC channel models.
JOURNAL OF NETWORK AND COMPUTER APPLICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Siqi Yan, Jeremy Adcock, Yunhong Ding
Summary: This review focuses on the application of graphene in high-performance silicon photonic devices and discusses the future trends and challenges of silicon-graphene hybrid photonic devices.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Alin-Mihai Cailean, Catalin Beguni, Sebastian-Andrei Avatamanitei, Mihai Dimian, Valentin Popa
Summary: This article proposes a new architecture to increase pedestrian safety on crosswalks, consisting of a pedestrian detection system and visible light communications system. The experimental results demonstrate high pedestrian detection rate and satisfactory communication distance and bit error ratio for the VLC system.
Article
Thermodynamics
Feng Li, Weixin Zhang, Zhe Jia, Zhao Liu, Zhenping Feng
Summary: This paper experimentally studied the cooling performance of blade tip phantom with different cooling hole configurations. Measurements indicated that the cooling holes on the leading edge mainly caused phantom cooling phenomenon at the front portion of the tip. Increasing spanwise angles deteriorated the phantom cooling performance. Simultaneously ejecting coolant from the leading edge and pressure side effectively cooled the tip surface.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Analytical
Catalin Beguni, Alin-Mihai Cailean, Sebastian-Andrei Avatamanitei, Alin-Dan Potorac, Eduard Zadobrischi, Mihai Dimian
Summary: Due to its unique advantages, the integration of VLC in vehicle safety applications has become a major research topic. This article proposes a novel approach to increase vehicular VLC systems' communication range by improving the VLC system based on the benefits that can be achieved through the VLC transmitter. The concept is based on LED current overdriving and a modified VPPM, which provide higher optical power and improved SNR for the VLC receiver.
Article
Telecommunications
Chen Zheng, Dekang Liu, Xuhui Ding, Xiangyuan Bu, Zhongshan Zhang
Summary: This paper investigates the problem of angle of arrival (AOA) tracking for large-scale arrays in terahertz communication. A two-stage tracking framework is proposed to address the challenges such as limited RF chains and rapid user mobility. The framework uses random phase matrix, orthogonal long pilots, and generalized-approximated-message-passing (GAMP) method to simplify the estimation complexity and improve the accuracy. The proposed method outperforms the traditional extended Kalman filter (EKF) method in angle tracking.
CHINA COMMUNICATIONS
(2022)