Shaobo Wang

Huawei Technologies (China)

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Jiyong Pang

Huawei Technologies (China)

David Plets

Ghent University

Zhi Wang

Chinese Academy of Sciences

Felipe Parralejo

Universidad de Extremadura

Jiaxing Chang

Taiyuan University of Technology

Wenfang Guo

Beijing University of Posts and Telecommunications

Yan Wang

Wuhan University

Fusang Zhang

Chinese Academy of Sciences

Zheng Wang

Purple Mountain Laboratories

Haiyong Luo

Chinese Academy of Sciences

Cooperative Institutions

Chinese Academy of Sciences

Huawei Technologies (China)

Beijing University of Posts and Telecommunications

University of Chinese Academy of Sciences

Southeast University

Chang'an University

Institute of Software

Peking University

Nanjing University of Aeronautics and Astronautics

Jilin University

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Aluminate Long Afterglow Luminescent Materials in Road Marking Field Research Progress and Development: A Review

Buildings (2024)

Fangzhi Zhang Yue Xie Xiaokang Zhao Yinzhang He Jianzhong Pei

This paper reviews the research progress and development of aluminate long afterglow luminescent materials in the field of road marking, especially the study of rare earth ion-activated strontium aluminate (SrAl2O4: Eu2+, Dy3+)-based long afterglow powders. This article begins by describing the importance of road markings and the need to improve their visibility and durability at night and in adverse weather conditions. Subsequently, the current passive and active methods for improving the visibility of marking materials are discussed in detail, focusing on the advantages of aluminate long afterglow materials and challenges related to their hydrolysis and thermal stability. Through the application of organic–inorganic composite coating technology, the water resistance and thermal stability of the materials can be improved, thus enhancing the performance of road markings. This article also summarizes the current research status of different types of long afterglow road marking coatings. It analyzes the luminescence mechanism of aluminate long afterglow materials. Additionally, this article discusses future research directions and application prospects. The aim is to provide technical references and support for the wide application of long afterglow self-luminous road marking coatings.

Aluminate

10.3390/buildings14072152

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Offsite Evaluation of Localization Systems: Criteria, Systems, and Results From IPIN 2021 and 2022 Competitions

IEEE Journal of Indoor and Seamless Positioning and Navigation (2024)

Francesco Potortì Antonino Crivello Soyeon Lee Blagovest Vladimirov Sangjoon Park

Indoor positioning is a thriving research area which is slowly gaining market momentum. Its applications are mostly customised, ad hoc installations; ubiquitous applications analogous to GNSS for outdoors are not available because of the lack of generic platforms, widely accepted standards and interoperability protocols. In this context, the Indoor Positioning and Indoor Navigation (IPIN) competition is the only long-term, technically sound initiative to monitor the state of the art of real systems by measuring their performance in a realistic environment. Most competing systems are pedestrian-oriented and based on the use of smartphones, but several competing Tracks were set up, enabling comparison of an array of technologies. The two IPIN competitions described here include only off-site Tracks. In contrast with on-site Tracks where competitors bring their systems on site - which were impossible to organise during 2021 and 2022 - in off-site Tracks competitors download pre-recorded data from multiple sensors and process them using the EvaalAPI, a real-time, web-based emulation interface. As usual with IPIN competitions, Tracks were compliant with the EvAAL framework, ensuring consistency of the measurement procedure and reliability of results. The main contribution of this work is to show a compilation of possible indoor positioning scenarios and different indoor positioning solutions to the same problem.

10.1109/jispin.2024.3355840

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Research on satellite unidirectional random vibration test method based on vibration fatigue equivalence

Journal of Physics Conference Series (2024)

Sizhou Dong Zhaoguang Bai Shaobo Wang Zhijia Liu Jing Chang

Abstract This article studies the unidirectional random vibration testing method based on vibration fatigue equivalence for batch production satellites, aiming to optimize the mechanical testing project of batch production satellites and reduce satellite development costs. This article first starts from the frequency domain vibration fatigue analysis method and constructs a relationship model between the number of acceleration cycles and the test duration. Then, based on the model of the relationship between the number of acceleration cycles and the duration of the experiment, the response of the satellite in various directions during the noise test was taken as a reference. The random vibration test and the noise test were analyzed for the number of acceleration cycles and the duration of the experiment. Finally, a unidirectional random vibration test method for batch production satellites was obtained.

Random vibration

Vibration fatigue

10.1088/1742-6596/2905/1/012031

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A new 5G radio evolution towards 5G-Advanced

Science China Information Sciences (2022)

Jiyong Pang Shaobo Wang Zhenfei Tang Yanmin Qin Xiaofeng Tao

Abstract The evolution of the fifth-generation (5G) new radio (NR) has progressed swiftly since the third generation partnership project (3GPP) standardized the first NR version (Release 15) in mid-2018. Nowadays, the world’s leading carriers are competing to provide various commercial services over 5G networks. Looking ahead to 2025 and beyond, it is expected that over 6.5 million 5G base stations will be installed to offer services to over 58% of the world’s population via over 100 billion 5G connections. Following the rapid development of 5G, an increasing number of commercialization use cases will drive the 5G network to continuously improve performance and expand capabilities. Hence, it is the right time to consider a well-defined framework and standardization for 5G NR evolution (5G-Advanced) to support commercialization between 2025 and 2030. First, this study addresses the key driving forces, requirements, usage scenarios, and capabilities of 5G-Advanced; then, it highlights the main technological challenges and introduces the top 10 promising technological directions in detail. Finally, other fascinating technological directions in 5G-Advanced are shortly mentioned.

10.1007/s11432-021-3470-1

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Citations (30)

NR Enhancements for Downlink MIMO in Rel-18

IEEE Communications Standards Magazine (2023)

Kunpeng Liu Shijie Cai Xiang Gao Xianda Liu C.J. Dong

Massive multiple-input multiple-output (MIMO) has been a key technology in 5G New Radio (NR) standard, which empowers significant system performance improvement in previous 5G NR Releases. To support higher data rate and multi-user simultaneous transmission in downlink, enhancement in massive MIMO is essential for NR Release 18 (Rel-18). In this article, we explore performance requirements, challenges, and potential technologies for MIMO enhancement. First, we summarize major performance requirements for MIMO in Enhanced Mobile Broadband scenario. Based on these requirements, we identify three critical challenges of MIMO enhancement for single transmission reception point (TRP) and multiple TRPs scheme, in which we highlight the promising coherent joint transmission (CJT) technique. For each challenge, we present specific description from requirement perspective and technique perspective, evaluate the pros and cons of potential solutions, and carry out simulations to illustrate the potential performance gain. Some insights on how to solve these challenges to enhance massive MIMO performance in NR Rel-18 are also provided.

10.1109/mcomstd.0010.2100073

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Electromagnetic-Compliant Channel Modeling and Performance Evaluation for Holographic MIMO

2022 IEEE Globecom Workshops (GC Wkshps) (2022)

Tengjiao Wang Wei Han Zhimeng Zhong Jiyong Pang Guohua Zhou

Recently, the concept of holographic multiple-input multiple-output (MIMO) is emerging as one of the promising technologies beyond massive MIMO. Many challenges need to be addressed to bring this novel idea into practice, including electromagnetic (EM)-compliant channel modeling and accurate performance evaluation. In this paper, an EM-compliant channel model is proposed for the holographic MIMO systems, which is able to model both the characteristics of the propagation channel and the non-ideal factors caused by mutual coupling at the transceivers, including the antenna pattern distortion and the decrease of antenna efficiency. Based on the proposed channel model, a more realistic performance evaluation is conducted to show the performance of the holographic MIMO system in both the single-user and the multi-user scenarios. Key challenges and future research directions are further provided based on the theoretical analyses and numerical results.

Transceiver

Spatial multiplexing

10.1109/gcwkshps56602.2022.10008519

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Citations (11)