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International Conference on Microwave and Millimeter Wave Technology Proceedings

作者： X. W. Chen B. F. Huang P. F. Gu J. X. Wang D. Z. Ding Department of Communication Engineering Nanjing University of Science and Technology Nanjing China State Key Laboratory of Millimeter Waves Southeast University Nanjing China National Key Laboratory of Science and Technology on Space Microwave China Academy of Space Technology Xi'an China

ISBN: (纸本)9781665482271

For fighter aircraft operating in the battlefield, the antenna system is one of the strong scattering sources on the aircraft, which has an important impact on the stealth performance of the fighter aircraft. This paper focuses on the design and layout of an airborne stealth antenna system, so that the antenna system has low scattering characteristics at 6-24GHz, and at the same time the antenna system can meet VSWR<3 in the band of 7-22GHz, so that the fighter jet can perfectly balance the effect of detection and stealth during the navigation.

关键词： Microwave antennas Microwave technology Layout Millimeter wave technology Scattering Directive antennas Military aircraft

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Preparing a commercial quantum key distribution system for certification against implementation loopholes

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Physical Review Applied 2024年第4期22卷 044076页

作者： Vadim Makarov Alexey Abrikosov Poompong Chaiwongkhot Aleksey K. Fedorov Anqi Huang Evgeny Kiktenko Mikhail Petrov Anastasiya Ponosova Daria Ruzhitskaya Andrey Tayduganov Daniil Trefilov Konstantin Zaitsev Skolkovo Moscow 121205 Russia Vigo Quantum Communication Center NTI Center for Quantum Communications Department of Physics Faculty of Science Institute for Quantum Computing Department of Physics and Astronomy Quantum technology foundation (Thailand) Bangkok 10110 Thailand QRate Skolkovo Moscow 143026 Russia Institute for Quantum Information & State Key Laboratory of High Performance Computing College of Computer Science and Technology Moscow 119991 Russia atlanTTic Research Center School of Telecommunication Engineering Department of Signal Theory and Communications Moscow 101000 Russia

A commercial quantum key distribution (QKD) system needs to be formally certified to enable its wide deployment. The certification should include the system’s robustness against known implementation loopholes and attacks that exploit them. Here we ready a fiber-optic QKD system for this procedure. The system has a prepare-and-measure scheme with decoy-state BB84 protocol, polarization encoding, a qubit source rate of 312.5 MHz, and is manufactured by QRate. We detail its hardware and postprocessing. We analyze the hardware for known implementation loopholes, search for possible new loopholes, and discuss countermeasures. We then amend the system design to address the highest-risk loopholes identified. We also work out technical requirements on the certification lab and outline its possible structure.

关键词： Quantum communication Quantum cryptography Quantum protocols

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Ultra-broadband Luminescent Bi/Er Co-Doped Optical Fibre Based Temperature Sensing system

Ultra-broadband Luminescent Bi/Er Co-Doped Optical Fibre Bas...

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OptoElectronics and communications Conference, OECC

作者： Yanhua Luo Jianxiang Wen Yanhua Dong Mengshi Zhu Tingyun Wang Shuen Wei Weiwen Zou Jiaying Wang Gang-Ding Peng Optical Fiber Research Institute Key Laboratory of Specialty Fiber Optics and Optical Access Networks Shanghai University Shanghai China Key Laboratory of Specialty Fiber Optics and Optical Access Networks Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication Shanghai Institute for Advanced Communication and Data Science Shanghai University Shanghai China Institute for Photonics and Advanced Sensing School of Physics Chemistry and Earth Sciences The University of Adelaide Adelaide SA Australia Department of Electronic Engineering State Key Laboratory of Advanced Optical Communications System and Networks Shanghai Jiao Tong University Shanghai China Photonics and Optical Communications Group School of Electrical Engineering and Telecommunications University of New South Wales Sydney NSW Australia

Bi/Er co-doped optical fibres (BEDFs) with the ultra-broadband emission and an eccentric core have been proposed for Mach–Zehnder interferometric (MZI) temperature sensing, which provides the temperature sensitivitie... 详细信息

ISBN: (数字)9798350308396

ISBN: (纸本)9798350308402

关键词： Temperature sensors Optical fibers Optical interferometry Temperature distribution Sensitivity Sensors Broadband communication Light sources

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Integrated Sensing and communications Towards Proactive Beamforming in mmWave V2I via Multi-Modal Feature Fusion (MMFF)

arXiv

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arXiv 2023年

作者： Zhang, Haotian Gao, Shijian Cheng, Xiang Yang, Liuqing State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China Guangzhou511400 China Guangzhou511400 China Department of Electronic and Computer Engineering the Department of Civil and Environmental Engineering The Hong Kong University of Science and Technology Hong Kong

The future of vehicular communication networks relies on mmWave massive multi-input-multi-output antenna arrays for intensive data transfer and massive vehicle access. However, reliable vehicle-to-infrastructure links require exact alignment between the narrow beams, which traditionally involves excessive signaling overhead. To address this issue, we propose a novel proactive beamforming scheme that integrates multi-modal sensing and communications via Multi-Modal Feature Fusion Network (MMFF-Net), which is composed of multiple neural network components with distinct functions. Unlike existing methods that rely solely on communication processing, our approach obtains comprehensive environmental features to improve beam alignment accuracy. We verify our scheme on the Vision-Wireless (ViWi) dataset, which we enriched with realistic vehicle drifting behavior. Our proposed MMFF-Net achieves more accurate and stable angle prediction, which in turn increases the achievable rates and reduces the communication system outage probability. Even in complex dynamic scenarios with adverse environment conditions, robust prediction results can be guaranteed, demonstrating the feasibility and practicality of the proposed proactive beamforming approach. Copyright © 2023, The Authors. All rights reserved.

关键词： Beamforming

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Temporal-Assisted Beamforming and Trajectory Prediction in Sensing-Enabled UAV communications

arXiv

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arXiv 2024年

作者： Zhou, Shengcai Yang, Halvin Xiang, Luping Yang, Kun School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China Department of Electronic and Electrical Engineering University College London LondonWClE 7JE United Kingdom State Key Laboratory ofNovel Software Technology Nanjing University Nanjing210008 China Suzhou215163 China

In the evolving landscape of high-speed communication, the shift from traditional pilot-based methods to a Sensing-Oriented Approach (SOA) is anticipated to gain momentum. This paper delves into the development of an innovative Integrated Sensing and communication (ISAC) framework, specifically tailored for beamforming and trajectory prediction processes. Central to this research is the exploration of an Unmanned Aerial Vehicle (UAV)-enabled communication system, which seamlessly integrates ISAC technology. This integration underscores the synergistic interplay between sensing and communication capabilities. The proposed system initially deploys omnidirectional beams for the sensing-focused phase, subsequently transitioning to directional beams for precise object tracking. This process incorporates an Extended Kalman Filtering (EKF) methodology for the accurate estimation and prediction of object states. A novel frame structure is introduced, employing historical sensing data to optimize beamforming in real-time for subsequent time slots, a strategy we refer to as’temporal-assisted’ beamforming. To refine the temporal-assisted beamforming technique, we employ Successive Convex Approximation (SCA) in tandem with Iterative Rank Minimization (IRM), yielding high-quality suboptimal solutions. Comparative analysis with conventional pilot-based systems reveals that our approach yields a substantial improvement of 156% in multi-object scenarios and 136% in single-object scenarios. Copyright © 2024, The Authors. All rights reserved.

关键词： Extended Kalman filters

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Optical Ranging Using Coherent Kerr Soliton Dual-microcombs with Extended Ambiguity Distance

arXiv

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arXiv 2023年

作者： Yang, Yuechen Shen, Yang Zhou, Kailu Hu, Chenhua Ding, Yuanzhuo Jiang, Tinghao Li, Wei Li, Yudong Feng, Liangsen Wu, Tengfei He, Guangqiang State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and Astronomy Shanghai Jiao Tong University Shanghai200240 China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology & Measurement Aviation Industry Corporation of China Beijing100095 China SJTU Pinghu Institute of Intelligent Optoelectronics Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China

Optical ranging is a key technology in metrology. Optical frequency combs are shown to provide several advantages in light ranging, offering high precision with high acquisition rate. However, performance of traditional ranging systems based on microcombs is limited by the short ambiguity distance and non-real-time processing. Here, we show that dual-comb ranging system using coherent Kerr soliton microcombs and optical switch realizes extended ambiguity distance and provides a route to real-time processing. The ambguity distance is extended to 3.28 m from about 1.5 mm and the uncertainty reaches about 1.05 × 10−7, while the system is compatible with low-bandwidth detectors. Combining coherent microcomb ranging systems with special FPGA could enable comb-based real-time ranging systems for several applications such as industrial process monitoring. © 2023, CC BY.

关键词： Real time systems

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Modeling, Capacity Studies, Antenna and system Designs for 6G/B6G 3D Continuous-Space Radio Channels Enabled by Electromagnetic Information Theory

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IEEE communications Surveys and Tutorials 2025年

作者： Wang, Cheng-Xiang Li, Junling Huang, Jie Huang, Chen Zhang, Zhaoyang Liu, Ying Zhou, Shidong Chen, Yunfei You, Xiaohu Gao, Xiqi Cui, Tie Jun Renzo, Marco Di Thompson, John Haas, Harald Schober, Robert Zhang, Rui Southeast University National Mobile Communications Research Laboratory School of Information Science and Engineering Nanjing211189 China Purple Mountain Laboratories Nanjing211111 China Zhejiang University Zhejiang Provincial Key Laboratory of Information Processing Communication and Networking College of Information Science and Electronic Engineering Hangzhou310007 China Xidian University National Key Laboratory of Radar Detection and Sensing Xi'an710071 China Tsinghua University State Key Laboratory on Microwave and Digital Communications Beijing100084 China University of Durham Department of Engineering DurhamDH1 3LE United Kingdom Southeast University State Key Laboratory of Millimeter Waves School of Information Science and Engineering Nanjing211189 China UniversitèParis-Saclay Laboratoire des Signaux et Systèmes CNRS CentraleSupélec Gif-sur-Yvette91192 France Centre for Telecommunications Research - Department of Engineering King's College London LondonWC2R 2LS United Kingdom School of Engineering EdinburghEH9 3BF United Kingdom Cambridge University Department of Engineering CambridgeCB2 1PZ United Kingdom Institute for Digital Communications Erlangen91054 Germany The Chinese University of HongKong School of Science and Engineering Shenzhen Research Institute of Big Data Shenzhen518172 China National University of Singapore Department of Electrical and Computer Engineering 117583 Singapore

Channel theory is a fundamental theory of wireless communications. The sixth generation (6G) and beyond 6G (B6G) wireless communication networks are expected to provide space-air-ground-sea global coverage. Base stations and users tend to move in three dimensional (3D) continuous spaces, while antennas and propagation environments can be tightly coupled. The underlying channels show an evolutionary trend to 3D continuous-space radio channels that combine antennas and wireless propagation channels, in comparison to discrete local-space wireless propagation channels in previous generations. This introduces new challenges for channel modeling, channel capacity analysis, antenna design, system design, etc. To address these challenges, this paper performs a comprehensive study on 3D continuous-space radio channels in 6G/B6G with the aid of electromagnetic information theory (EIT) that integrates electromagnetic theory, information theory, wireless propagation channel modeling theory, and antenna theory. We start by revealing the connections and gaps between these four fundamental theories. Then, an in-depth investigation on the four major research thrusts of 3D continuous-space radio channels is provided: 1) channel measurements and modeling, 2) channel capacity analysis, 3) general antenna design, and 4) wireless system design. We aim to explore the intrinsic relationships between antenna parameters, channel parameters, channel characteristics, channel capacity, and communication system performance. Finally, future research directions and challenges for 3D continuous-space radio channels are outlined. Our study endeavors to establish a fundamental framework for 3D continuous-space radio channels, with the potential to catalyze breakthroughs in 6G/B6G theories. © 1998-2012 IEEE.

关键词： Antenna grounds

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A 1 km Line-of-Sight Ultraviolet communication system with a Data Rate of 26.6kbps

A 1 km Line-of-Sight Ultraviolet Communication System with a...

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IEEE International Conference on Electrical engineering and Photonics (EExPolytech)

作者： Mingyang Wang Tian Cao Shihan Chen Changyong Pan Jian Song Department of Electronic Engineering Beijing National Research Center for Information Science and Technology (BNRist) Tsinghua University Beijing China State Key Laboratory of Integrated Service Networks School of Telecommunications Engineering Xidian University Xian China Key Laboratory of Digital TV System of Guangdong Province and Shenzhen City Research Institute of Tsinghua University in Shenzhen Shenzhen China

Ultraviolet communication (UVC) has emerged as a promising solution for close-range communication within the intricate electromagnetic setting. The atmosphere's attenuation, however, restricts the scope and rate of communication. We demonstrated a line-of-sight (LOS) UV communication system. In our system, we employed ultraviolet light-emitting diodes (LEDs) in our system to transmit the signal light with a broad radiation angle and use lenses to enhance the communication range. We propose a combined approach of theory and practice to analyze the feasibility of a LOS UVC system.

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Over-the-Air Data Aggregation Aided by Multi-Functional RIS in Internet of Robotic Things

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IEEE Transactions on Vehicular Technology 2025年

作者： Zhang, Xinran Tian, Hui Ni, Wanli Yang, Zhaohui Beijing University of Posts and Telecommunications State Key laboratory of Networking and Switching Technology Beijing 100876 China Tsinghua University Department of Electronic Engineering Beijing 100084 China Zhejiang University College of Information Science and Electronic Engineering Hangzhou 310027 China Zhejiang Provincial Key Lab of Information Processing Communication and Networking Hangzhou 310007 China

To facilitate fast data aggregation in Internet of Robotic Things, over-the-air computation (AirComp) is a communication-efficient enabler by virtue of its high spectrum efficiency and low transmission latency. In this paper, we introduce the multi-functional reconfigurable intelligent surface (MF-RIS) as a means to mitigate aggregation mean square error (MSE) by enhancing signals across the entire space for robots. However, imperfect channel state information (CSI), stemming from inaccurate channel estimation and robot mobility-induced channel aging, can degrade transmission accuracy. This challenge is further exacerbated when future dynamic CSI is unavailable. We aim to minimize long-term MSE through transceiver beamforming and MF-RIS coefficient design. To confront system dynamics without prior knowledge, we propose a deep reinforcement learning (DRL)-based double-agent algorithm. Our DRL-based algorithm comprises an MF-RIS mode-guided strategy and an asynchronous agent collaboration framework. Specifically, one agent designs MF-RIS modes, guiding the second agent in configuring transceiver and MF-RIS beamforming, and then an asynchronous network update framework is proposed to enhance agent interaction. Numerical results corroborate the performance gain brought by the MF-RIS, as well as the effectiveness and robustness of the proposed algorithm in suppressing long-term MSE under imperfect CSI. © 1967-2012 IEEE.

关键词： deep reinforcement learning imperfect channel state information Internet of Robotic Things over-the-air computation reconfigurable intelligent surface

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A Matching Based Escape Routing Algorithm with Variable Design Rules and Constraints

A Matching Based Escape Routing Algorithm with Variable Desi...

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Design Automation Conference

作者： Qinghai Liu Disi Lin Chuandong Chen Huan He Jianli Chen Yao-Wen Chang Center for Discrete Mathematics Fuzhou University Fuzhou China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou China Department of Microelectronics Fuzhou University Fuzhou China Hangzhou Huawei Enterprises Telecommunication Technologies Co. Ltd Hangzhou China State Key Lab of ASIC & System Fudan University Shanghai China Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan Department of Electrical Engineering National Taiwan University Taipei Taiwan

Escape routing is a critical problem in PCB routing, and its quality greatly affects the PCB design cost. Unlike the traditional escape routing that works mainly for the BGA package with unique line width and space, this paper presents a high-performance escape routing algorithm to handle problems with variable design rules and manual constraints, including variable line widths/spaces, the neck mode of wires, and the pad entry for differential pairs. We first propose a novel obstacle-avoiding method to project pins to the boundary and construct a channel projection graph. We then construct a bi-projection graph and propose a matching-based hierarchical sequencing algorithm to consider manual constraints. We perform global routing for each pin/differential pair by congestion-avoiding path initialization and rip-up and reroute path optimization. Finally, we complete detailed routing in every face, ensuring the wire angle and pad entry constraints. Experimental results show that our algorithm can achieve 100% routability without any design rule violation for all given industrial PCB instances, while two state-of-the-art routers cannot complete routing.

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