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Building mm Wave on the Evolving C-V2X:mm Wave NR-V2X

China communications 2024年第1期21卷 88-101页

作者： Shanzhi Chen Xinxin He Rui Zhao Jinling Hu Xin Zhang China Information and Communication Technology Group Co. Ltd.(CICT)the State Key Laboratory of Wireless Mobile CommunicationsBeijing 100083China Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture and ConvergenceBeijing University of Posts and TelecommunicationsBeijing 100876China CICT Connected and Intelligent Technologies Co. LtdChina Academy of Telecommunication TechnologyBeijing 100191China CICT Mobile Communications Technology Co.Ltd.

Since the evolving standardization of cellular V2X(C-V2X)technologies is continuously developed by 3GPP,research on new radio(NR-V2X)has been on schedule by academic and *** millimeter wave(mm Wave)frequency band is supposed to provide large transmission bandwidth,yet the development of mm Wave band in NR-V2X is still in preliminary *** this article,a comprehensive discussion of mm Wave NR-V2X is given covering trends,standardization landscape,and enabling technologies,aiming at tackling the challenge of channel modeling,directional channel access,beamforming and blockage *** vision of mm Wave NR-V2X is to fully support the development of automated driving,holographic control display and improved in-car infotainment for the future.

关键词： C-V2X enabling technologies mmWave NR-V2X

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Integrated optical frequency transfer and optical physical layer key distribution with enhanced link reciprocity detection

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Science China(Information Sciences) 2024年第7期67卷 335-336页

作者： Kunfeng XIE Liang HU Jianping CHEN Guiling WU State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic EngineeringShanghai Jiao Tong University

optical fiber transmission has been widely used in communications and metrology, wherein optical frequency transfer (OFT) and optical physical layer secure key distribution (OKD) have become research hotspots [1, 2]. Moreover,OFT can perform a comparison between state-of-the-art optical atomic clocks and implement coherent optical phase transfer over long distances to support geodesy [1, 3].

关键词： distribution integrated physical detection layer link with enhanced frequency optical

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On the PMD Impact of Dual-Polarization Direct Detection with Jones-Space optical Field Recovery

On the PMD Impact of Dual-Polarization Direct Detection with...

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2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Wu, Qi Zhu, Yixiao Jiang, Hexun Xu, Zhaopeng Ji, Honglin Yang, Yu Qiao, Gang Wang, Shangcheng Liu, Lulu Liang, Junpeng Wei, Jinlong Li, Jiali He, Zhixue Zhuge, Qunbi Hu, Weisheng Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering China Peng Cheng Laboratory Shenzhen China

ISBN: (纸本)9798350312614

We theoretically extend the concept of proposed Jones-space optical field recovery to the all-order polarization mode dispersion model for short-reach direct detection optical fiber communications. We numerically verify the impact of polarization mode dispersion can be mitigated using linear equalization as coherent detection systems with a 56-GBd dual-polarization QPSK, 16-QAM, and 64-QAM simulation. © 2023 IEEE.

关键词： Direct detection Jones-space optical field recovery polarization mode dispersion

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405-GBd OOK and 201-GBd PAM-4 IM/DD Optics at Record Faster-Than-Nyquist Ratios of 226.6% and 62.1% Enabled by advanced Noise Whitening

405-GBd OOK and 201-GBd PAM-4 IM/DD Optics at Record Faster-...

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2023 Asia communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Wu, Qi Xu, Zhaopeng Zhu, Yixiao Ji, Honglin Yang, Yu Liang, Junpeng Qiao, Gang Wang, Shangcheng Liu, Lulu Wei, Jinlong Zhuge, Qunbi Hu, Weisheng Peng Cheng Laboratory Shenzhen China Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering China

ISBN: (纸本)9798350312614

We experimentally demonstrate 405-GBd OOK and 201-GBd PAM-4 signaling in an intensity modulation and direct detection system with a 62-GHz brick-wall bandwidth. Record faster-than-Nyquist ratios of 226.6% and 62.1% are successfully achieved for OOK and PAM-4 modulations, enabled by the proposed gradient-decent noise whitening technique. © 2023 IEEE.

关键词： faster-than-Nyquist IM-DD noise whitening OOK PAM-4

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Accurate and broadband manipulations of harmonic amplitudes and phases to reach 256 QAM millimeter-wave wireless communications by time-domain digital coding metasurface

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National Science Review 2022年第1期9卷 36-46页

作者： Ming Zheng Chen Wankai Tang Jun Yan Dai Jun Chen Ke Lei Zhang Cheng Zhang Jin Yang Lianlin Li Qiang Cheng Shi Jin Tie Jun Cui Institute of Electromagnetic Space Southeast University State Key Laboratory of Terahertz and Millimeter Waves City University of Hong Kong State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronics Peking University National Mobile Communications Research Laboratory Southeast University State Key Laboratory of Millimeter Waves Southeast University Center of Intelligent Metamaterials Pazhou Laboratory

We propose a theoretical mechanism and new coding strategy to realize extremely accurate manipulations of nonlinear electromagnetic harmonics in ultrawide frequency band based on a time-domain digital coding metasurface(TDCM).Using the proposed mechanism and coding strategy,we design and fabricate a millimeter-wave(mmWave) TDCM,which is composed of reprogrammable meta-atoms embedded with positive-intrinsic-negative *** controlling the duty ratios and time delays of the digital coding sequences loaded on a TDCM,experimental results show that both amplitudes and phases of different harmonics can be engineered at will simultaneously and precisely in broad frequency band from 22 to33 GHz,even when the coding states are imperfect,which is in good agreement with theoretical *** on the fabricated high-performance TDCM,we further propose and experimentally realize a large-capacity mmWave wireless communication system,where 256 quadrature amplitude modulation,along with other schemes,is *** new wireless communication system has a much simpler architecture than the currently used mmWave wireless systems,and hence can significantly reduce the hardware *** believe that the proposed method and system architecture can find vast application in future mmWave and terahertz-wave wireless communication and radar systems.

关键词： metasurface time-domain digital coding accurate and broadband harmonic control 256 QAM millimeter-wave wireless communications

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44.6 fs pulse generation in an Er:fiber laser at 540 MHz repetition rate

44.6 fs pulse generation in an Er:fiber laser at 540 MHz rep...

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Chen, Zhendong Yang, Ruoao Tang, Yangpeng Pan, Duo Wang, Ya Cao, Jingpeng Wu, Jian Jun Zhang, Zhigang Chen, Jingbiao State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing100871 China Zhongshan InitiaLase Technologies Inc. Zhongshan528437 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

We demonstrate a mode-locked ring-cavity Er:fiber laser at a repetition rate of 540 MHz. The pulse duration is 44.6 fs with a spectral bandwidth of 82 nm. The maximum output power is 280 mW. © Optica Publishing G... 详细信息

ISBN: (纸本)9781957171395

关键词： Fiber lasers

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44.6 fs pulse generation in an Er:fiber laser at 540 MHz repetition rate

44.6 fs pulse generation in an Er:fiber laser at 540 MHz rep...

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CLEO: Science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

关键词： Fiber lasers

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GHz Harmonic Mode-Locking from a Yb-Doped Fiber Laser with Consistently High SMSR 37

GHz Harmonic Mode-Locking from a Yb-Doped Fiber Laser with C...

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37th European Frequency and Time Forum, EFTF 2024

作者： Wang, Ya Yang, Ruoao Chen, Zhendong Pan, Duo Luo, Bin Zhang, Zhigang Chen, Jingbiao Beijing University of Posts and Telecommunications State Key Laboratory of Information Photonics and Optical Communications Beijing100876 China School of Electronics Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks Beijing100871 China Innovation Program for Quantum Science and Technology Hefei National Laboratory Hefei230088 China

We built a mode-locked laser with a base frequency of 150 MHz, which can achieve 7th harmonic mode-locking up to 1.05 GHz by fine-tuning the polarization device in the cavity with high super mode suppression ratio ove... 详细信息

ISBN: (纸本)9798350354270

关键词： Mode-locked fiber lasers

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Sound Source Localization Using Phase-sensitive optical Time-domain Reflectometry 13

Sound Source Localization Using Phase-sensitive Optical Time...

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advanced Sensor systems and Applications XIII 2023

作者： Tian, Yu Fan, Xinyu He, Zuyuan State Key Laboratory of Advanced Optical System and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China

ISBN: (纸本)9781510667914

Partial discharge often occurs in power equipment, which erodes insulation and eventually results in insulation failure. As partial discharge will generate sound such as acoustic or ultrasonic waves, a phase-sensitive optical time-domain reflectometry (φ-OTDR) is used to measure these signals. Then the number and locations of sound sources can be calculated using array signal processing methods such as Gerschgorin circle theorem and MUSIC (multiple signal classification) algorithm. In the experiment, several sound sources with frequencies below 600 kHz are used to simulate the partial discharges. Our system shows a high sensitivity and strong noise resistance performance. Accurate number estimation is realized with positioning errors less than 3 cm. © 2023 SPIE.

关键词： Multiple signal classification

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Temperature measurement system for transformer using Brillouin optical correlation domain analysis 13

Temperature measurement system for transformer using Brillou...

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advanced Sensor systems and Applications XIII 2023

作者： Li, Rijing Fan, Xinyu Chang, Yanming Xiao, Zhengyuan He, Zuyuan State Key Laboratory of Advanced Optical System and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China

ISBN: (纸本)9781510667914

Brillouin optical correlation domain analysis (BOCDA) offers high spatial resolution and multi-point measurement capabilities which are ideal for transformer winding temperature measurements. In this article, a BOCDA prototype is developed by changing many equipment to modules, and using field-programmable gate arrays (FPGA) for the control, acquisition, and processing. The system achieves a desired performance with a spatial resolution of 10 cm, a Brillouin frequency shift (BFS) accuracy of about 0.9 MHz, and a measurement speed of 500 points/second. © 2023 SPIE.

关键词： Temperature measurement

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