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Cellular Vehicle-to-Everything (C-V2X) Testing: From Theory to Practice

IEEE Network 2025年

作者： Bai, Lu Huang, Ziwei Ge, Yuming Yu, Rundong Wang, Longxiang Cheng, Xiang Shandong University Jinan250101 China National Mobile Communications Research Laboratory Southeast University 214135 China Shandong Research Institute of Industrial Technology Jinan250100 China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China Technology and Standards Research Institute China Academy of Information and Communications Technology Bejing100191 China Ministry of Industry and Information Technology Bejing100191 China Caict Innovation Center of Automotive and Transportation Chengdu610100 China

Currently, the research on the cellular vehicle-to-everything (C-V2X) technology has obvious challenges and limitations of security, reliability, and consistency. This article aims to provide insights for a comprehensive understanding of C-V2X testing from the perspectives of communication performance, functional application, and security, which can support the C-V2X network softwarization and management. First, we review the recent progress of C-V2X testing on wireless communications, including antenna and propagation, protocol conformance, communication performance, and interoperability testing. Second, we discuss the current work in the area of C-V2X testing on functional applications, including functional environment and positioning performance testing. Third, we review the recent advance in C-V2X testing on security, including vehicular gateway and penetration security testing. Finally, open issues and promising future research directions for C-V2X testing are outlined. © 2024 IEEE.

关键词： Vehicle to Everything

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Semiconductor quantum dot-doped glass as spectral converter for photovoltaic application

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Chinese Science Bulletin 2014年第1期59卷 16-22页

作者： Lu Sun Chun Jiang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University

In this article,we focus on using the multiexciton generation(MEG)effect of quantum dot(QD)to realize quantum cutting of high-energy photons which will give rise to a remarkable increase of total photon *** avoid the complicated solving of Schro¨dinger equation,we take approximations and develop a method for fast evaluating the quantum efficiency of MEG *** this basis,we calculate the detailed balance limit of efficiency of Si single-junction solar cell with Si QD-doped glass placed on top of it as a spectral converter *** shows that the efficiency will reach 36%which is 6%higher than that without the converter *** have also explored the influence of QD radius,QD-doping density,QD,and host material,device working temperature on the efficiency.

关键词：半导体量子点掺杂玻璃转换器光谱应用光伏太阳能电池量子剪裁

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Towards silicon photonic neural networks for artificial intelligence

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Science China(Information Sciences) 2020年第6期63卷 105-118页

作者： Bowen BAI Haowen SHU Xingjun WANG Weiwen ZOU State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Engineering and Computer Science Peking University Frontiers Science Center for Nano-optoelectronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Intelligent Microwave Lightwave Integration Innovation Center(iMLic) Department of Electronic Engineering Shanghai Jiao Tong University

Brain-inspired photonic neural networks for artificial intelligence have attracted renewed interest. For many computational tasks, such as image recognition, speech processing and deep learning, photonic neural networks have the potential to increase the computing speed and energy efficiency on the orders of magnitude compared with digital electronics. Silicon Photonics, which combines the advantages of electronics and photonics, brings hope for the large-scale photonic neural network integration. This paper walks through the basic concept of artificial neural networks and focuses on the key devices which construct the silicon photonic neuromorphic systems. We review some recent important progress in silicon photonic neural networks, which include multilayer artificial neural networks and brain-like neuromorphic systems, for artificial intelligence. A prototype of silicon photonic artificial intelligence processor for ultra-fast neural network computing is also proposed. We hope this paper gives a detailed overview and a deeper understanding of this emerging field.

关键词： photonic neural networks artificial intelligence deep learning photonic computing accelerator silicon photonics

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Compact 517 MHz soliton mode-locked Er-doped fiber ring laser

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Photonics Research 2016年第1期4卷 27-29页

作者： Jian Zhang Ziyun Kong Yizhou Liu Aimin Wang Zhigang Zhang State Key Laboratory of Advanced Optical Communication System and Networks School of Electronics Engineering and Computer Science Peking University

We report on a compact passive mode-locked Er:fiber ring laser operated at the fundamental repetition rate of 517 MHz, which we believe is the highest fundamental repetition rate ever reported in a ring cavity fiber *** key technique is the employment of two innovative high-power wavelength domain multiplexer collimators with all gain fiber cavity suited for the high power(up to 2 W) pumping. The laser is featured with a direct chirpfree output pulse, which is 97 fs without extracavity compression at an average output power of 90 mW.

关键词： mode rate Compact 517 MHz soliton mode-locked Er-doped fiber ring laser ring

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Enhanced conversion efficiency of Yb^(2+)–Yb^(3+)-codoped glass as spectral converter for photovoltaic application

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Chinese Science Bulletin 2014年第5期59卷 480-483页

作者： Lu Sun Wenbin Xu Chun Jiang State Key Laboratory of Advanced Optical Communication System and Networks Shanghai Jiao Tong University

We propose a kind of Yb2?–Yb3?-codoped glass,which is used as spectral converter layer to adjust AM1.5 solar spectrum for a better match with silicon *** energy-level rate equations and power transmission equations are established to analyze the down-conversional effect of the codoped glass on solar *** numerical results show that with proper doping concentration and thickness the glass layer may improve conversion efficiency by about 12%.Moreover,we also apply the modified spectrum as excitation source of solar cell in a simulation platform,and reveal that there is about 15%improvement in practical cells.

关键词：掺杂玻璃转换效率转换器频谱应用共掺光伏镱

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Rate compatible reconciliation for continuous-variable quantum key distribution using Raptor-like LDPC codes

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Science China(Physics,Mechanics & Astronomy) 2021年第6期64卷 26-34页

作者： Chao Zhou Xiang Yu Wang ZhiGuo Zhang Song Yu ZiYang Chen Hong Guo State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronicsand Center for Quantum Information TechnologyPeking UniversityBeijing 100871China

In the practical continuous-variable quantum key distribution(CV-QKD)system,the postprocessing process,particularly the error correction part,significantly impacts the system ***-edge type low-density parity-check(MET-LDPC)codes are suitable for CV-QKD systems because of their Shannon-limit-approaching performance at a low signal-to-noise ratio(SNR).However,the process of designing a low-rate MET-LDPC code with good performance is extremely ***,we introduce Raptor-like LDPC(RL-LDPC)codes into the CV-QKD system,exhibiting both the rate compatible property of the Raptor code and capacity-approaching performance of MET-LDPC ***,this technique can significantly reduce the cost of constructing a new *** design the RL-LDPC matrix with a code rate of 0.02 and easily and effectively adjust this rate from 0.016 to *** results show that we can achieve more than 98%reconciliation efficiency in a range of code rate variation using only one RL-LDPC code that can support high-speed decoding with an SNR less than-16.45 d *** code allows the system to maintain a high key extraction rate under various SNRs,paving the way for practical applications of CV-QKD systems with different transmission distances.

关键词： continuous-variable quantum key distribution reconciliation Raptor-like LDPC codes

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Performance analysis of quantum key distribution using polarized coherent-states in free-space channel

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Chinese Physics B 2023年第3期32卷 111-119页

作者：郑增特陈子扬黄露雨王翔宇喻松 State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronicsand Center for Quantum Information TechnologyPeking UniversityBeijing 100871China

In free space channel,continuous-variable quantum key distribution(CV-QKD)using polarized coherent-states can not only make the signal state more stable and less susceptible to interference based on the polarization non-sensitive of the free-space channel,but also reduce the noise introduced by phase ***,arbitrary continuous modulation can not be carried out in the past polarization coding,resulting in that the signal state can not obtain arbitrary continuous value in Poincare space,and the security analysis of CV-QKD using polarized coherent-states in free space is not *** we propose a new modulation method to extend the modulation range of signal states with an optical-fiber-based polarization *** particular,in terms of the main influence factors in the free-space channel,we utilize the beam extinction and elliptical model when considering the transmittance and adopt the formulation of secret key *** addition,the performance of the proposed scheme under foggy weather is also taken into consideration to reveal the influence of severe *** simulation shows that the proposed scheme is seriously affected by attenuation under foggy *** protocol fails when visibility is less than 1 *** the same time,the wavelength can affect the performance of the proposed ***,under foggy weather,the longer the wavelength,the smaller the attenuation coefficient,and the better the transmission *** proposed scheme can expand the modulation range of signal state,and supplement the security research of the scheme in the free-space channel,thus can provide theoretical support for subsequent experiments.

关键词： polarized coherent-states free-space channel performance analysis

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Reconfigurable silicon integrated RF photonic filter toward wireless communication

Reconfigurable silicon integrated RF photonic filter toward ...

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2023 International Topical Meeting on Microwave Photonics, MWP 2023

作者： Tao, Zihan Tao, Yuansheng Jin, Ming Chen, Ruixuan Shu, Haowen Wang, Xingjun Peking University State Key Laboratory of Advanced Optical Communications System and Networks School of Electronics Beijing China

ISBN: (纸本)9798350342215

Integrated microwave photonic filters (IMPFs) are capable of offering unparalleled reconfigurability. However, to achieve high reconfigurability, complicated system structures and modulation formats are always required, which put great pressure on power consumption and controlment. Here, we propose a streamlined architecture for a wideband and highly reconfigurable IMPF on the silicon photonics platform. For various practical filter responses and avoiding complex auxiliary devices and bias drift problems, a phase-modulated flexible sideband cancellation method is employed based on the intensity-consistent single-stage-Adjustable cascaded-microring (ICSSA-CM). The IMPF exhibits an operation band extends to mm-wave (≥ 30 GHz) and other extraordinary performances including high spectral resolution of 220 MHz and large rejection ratio of 60 dB are obtained. Moreover, Gbps-level RF wireless communications are demonstrated for the first time towards real-world scenarios. © 2023 IEEE.

关键词： Millimeter waves

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Numerical analysis of four-wave-mixing based multichannel wavelength conversion techniques in fibers

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Journal of Semiconductors 2009年第5期30卷 55-59页

作者：贾亮张帆李明刘育梁陈章渊 Optoelectronic System Laboratory Institute of SemiconductorsChinese Academy of Sciences State Key Laboratory of Advanced Optical Communication Systems & Networks School of Electronics Engineering and Computer SciencePeking University

We numerically investigate four-wave-mixing （FWM） based multichannel wavelength conversion for amplitude-modulated signals, phase-modulated signals, together with mixed amplitude and phase modulated signals. This paper also discusses the influence of stimulated Brillouin scattering （SBS） effects on high-efficiency FWM-based wavelength conversion applications. Our simulation results show that DPSK signals are more suitable for FWM-based multichannel wavelength conversion because the OOK signals will suffer from the inevitable data- pattern-dependent pump depletion. In future applications, when the modulation format is partially upgraded from OOK to DPSK, the influence of OOK signals on the updated DPSK signals must be considered when using multi-channel wavelength conversion. This influence becomes severe with the increase of OOK channel number. It can be concluded that DPSK signals are more appropriate for both transmission and multichannel wavelength conversion, especially in long haul and high bit-rate system.

关键词： stimulated Brillouin scattering wavelength conversion four-wave mixing nonlinear optics

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Numerical analysis for four-wave mixing based wavelength conversion of differential phase-shift keying signals

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Chinese Optics Letters 2009年第7期7卷 617-620页

作者：贾亮张帆李明刘育梁陈章渊 State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computer Science Peking University Optoelectronic System Laboratory Institute of Semiconductors Chinese Academy of Sciences

We numerically investigate the main constrains for high efficiency wavelength conversion of differential phase-shift keying （DPSK） signals based on four-wave mixing （FWM） in highly nonlinear fiber （HNLF）. Using multi-tone pump phase modulation techniques, high efficiency wavelength conversion of DPSK signals is achieved with the stimulated BriIlouin scattering （SBS） effects effectively suppressed. Our analysis shows that there is a compromise between conversion efficiency and converted idler degradation. By optimizing the pump phase modulation configuration, the converted DPSK idler＇s degradation can be dramatically decreased through balancing SBS suppression and pump phase modulation degradation. Our simulation results also show that these multi-tone pump phase modulation techniques are more appropriate for the future high bit rate systems.

关键词： Conversion efficiency Degradation Frequency modulation optical frequency conversion Phase shift Phase shift keying Pumps Stimulated Brillouin scattering

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