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MmWave extra-large-scale MIMO based active user detection and channel estimation for high-speed railway communications

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High-Speed Railway 2023年第1期1卷 31-36页

作者： Anwen Liao Ruiqi Wang Yikun Mei Ziwei Wan Shicong Liu Zhen Gao Hua Wang Hao Yin Nanjing Research Institute of Electronics Technology Nanjing 210039China School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China Advanced Research Insttute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Insttute of China Electronic System Engineering Corporation Beijing 100141China

The current High-Speed Railway(HSR)communications increasingly fail to satisfy the massive access services of numerous user equipment brought by the increasing number of people traveling by *** this end,this paper investigates millimeter-Wave(mmWave)extra-large scale(XL)-MIMO-based massive Internet-of-Things(loT)access in near-field HSR communications,and proposes a block simultaneous orthogonal matching pursuit(B-SOMP)-based Active User Detection(AUD)and Channel Estimation(CE)scheme by exploiting the spatial block sparsity of the XLMIMO-based massive access ***,we first model the uplink mmWave XL-MIMO channels,which exhibit the near-field propagation characteristics of electromagnetic signals and the spatial non-stationarity of mmWave XL-MIMO *** exploiting the spatial block sparsity and common frequency-domain sparsity pattern of massive access channels,the joint AUD and CE problem can be then formulated as a Multiple Measurement Vectors Compressive Sensing(MIMV-CS)*** on the designed sensing matrix,a B-SOMP algorithm is proposed to achieve joint AUD and ***,simulation results show that the proposed solution can obtain a better AUD and CE performance than the conventional CS-based scheme for massive IoT access in near-field HSR communications.

关键词： High-speed railway communications Massive access Activeuser detection Channel estimation Millimeter-wave extra-large scale MIMO Near-field spatial non-stationarity

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Non-contact Head Gesture Maneuvering system for Electric Wheelchair using a Depth Sensor

Non-contact Head Gesture Maneuvering System for Electric Whe...

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International Conference on Sensing Technology

作者： Hirofumi Ohtsuka Tatsuya Kato Koki Shibasato Takahiro Kashimoto Department of Control and Information Systems Engineering National Institute of Technology Kumamoto College Advanced Course of Electronics and Information Systems Engineering National Institute of Technology Kumamoto College

ISBN: (纸本)9781479963157

Population of elderly people has been increasing not only in Japan but also in many countries. For the purpose of expanding the active field of them and persons with disabilities, and of improving their quality of life (QOL), the development of an intelligent wheelchair has been intensively studied. In this research, a new maneuver interface of the electric wheelchair instead of the joy-stick is considered. To develop such an interface, this paper deals with a simple non-contact detection method of horizontal head gesture motion using a depth sensor.

关键词： Electric wheelchair Gestures Disabled Persons Maneuvering inspection methods aged person Head Sensors

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Adaptive iterative learning control for a class of iteration-varying nonlinear systems with known periodicity

Adaptive iterative learning control for a class of iteration...

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International Conference on Test and Measurement (ICTM)

作者： Yin Chenkun Hou Zhongsheng Advanced Control System Laboratory School of Electronics and Information Engineering Beijing Jiaotong University Beijing China

ISBN: (纸本)9781424446995

In this paper, a class of iteration-varying nonlinear system to track a non-repetitive desired trajectory is addressed using a new adaptive iterative learning control. The iteration-variance in parameter is described by a special kind of periodicity in iteration domain. The convergent result is elaborately proven using composite energy function.

关键词： Programmable control Adaptive control Nonlinear control systems Control systems Nonlinear systems Traffic control Trajectory Electronic equipment testing Robotic assembly Nonlinear dynamical systems

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Model-free adaptive control of dual-axis linear motor gantry system

Model-free adaptive control of dual-axis linear motor gantry...

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Chinese Control Conference (CCC)

作者： Yixiao Zhang Xiangbin Liu Zhongsheng Hou Shangtai Jin Advanced Control System Laboratory School of Electronics and Information Engineering Beijing Jiaotong University 100044 China

The linear motor has characteristics of simple structure, high positioning accuracy and fast response. Now it is widely used in machinery manufacturing, aerospace industry and many linear motion occasions. In this paper, in order to realize accuracy tracking of two-axis linear motor gantry system, modified model free adaptive control is proposed and used to realize the position control. The controller design is just based on the input and output data of linear motor instead of motor mathematical model. For the gantry system, an experimental setup is built. In the designed experimental *** use Visual C++ to realize the control algorithm, PMAC Clipper to control the input and output data with, and D1 driver to drive the motor. At last, experiment results show that the method guarantees strong robustness for desired trajactory and satisfactory control performance.

关键词： Adaptation models Adaptive control Electronic mail Control systems Educational institutions Accuracy Mathematical model

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An educational tool to simulate γ-rays intensity distribution around blocks

An educational tool to simulate γ-rays intensity distributi...

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2018 Transactions of the American Nuclear Society, ANS 2018

作者： Kunimi, Yusuke Tenzou, Hideki Yokoyama, Kai Nagoshi, Ayumi Advanced Course in Electronics Information and Communication Engineering National Institute of Technology Kagawa College 551 Koda Takuma-cho Mitoyo Kagawa769-1192 Japan Department of Electronic Systems Engineering National Institute of Technology Kagawa College 551 Koda Takuma-cho Mitoyo Kagawa769-1192 Japan

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A γ-rays source detector by image processing technology

A γ-rays source detector by image processing technology

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2018 Transactions of the American Nuclear Society, ANS 2018

作者： Yokoyama, Kai Tenzou, Hideki Nagoshi, Ayumi Kunimi, Yusuke Advanced Course in Electronics Information and Communication Engineering National Institute of Technology Kagawa College 551 Koda Takuma-cho Mitoyo Kagawa769-1192 Japan Department of Electronic Systems Engineering National Institute of Technology Kagawa College 551 Koda Takuma-cho Mitoyo Kagawa769-1192 Japan

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Developing an Agricultural Internet of Things system Using Low Power Wide Area Technology

Developing an Agricultural Internet of Things System Using L...

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IEEE International Conference on Computing, Communications and IoT Applications

作者： Yuki Matamura Shinji Chiba Advanced Course of Information and Electronic System National Institute of Technology Sendai College Department of General Engineering National Institute of Technology Sendai College

ISBN: (数字)9781728119731

ISBN: (纸本)9781728119748

Smart agriculture is used by many farmers and its effects, which decrease the workload on farms and increase crop yield, have been confirmed. However, it has not yet become popular with medium- or small-scale farmers in Japan, many of whom are quite elderly, because of its high cost and uncertainties about its effect. Therefore, we proposed an agricultural Internet of Things (IoT) system using low power wide area (LPWA) wireless technology. The IoT system consists of a sensor network, remote control devices, and a smartphone application. Our LPWA communication system covers all fields in a large farm;therefore, farmers can use our system at a low cost by sharing the communication system. Furthermore, because the smartphone application allows farmers share farm information with privacy they can control, they can use the application to support each other. We began experiments using this IoT system with farmers;this paper presents the results of those experiments and discusses the availability of this system.

关键词： LPWA Sub-GHz wireless Smart agriculture Sensor network Smartphone application Sensor networks Internet of things Farmers (2004) Farms Smartphone

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A reduced-size and tunable branch-line 3dB hybrid

A reduced-size and tunable branch-line 3dB hybrid

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Asia-Pacific Conference on Microwave

作者： Satoshi Kondo Hajime Kondo Hitoshi Ishida Advanced System Engineering Course Gunma National College of Technology Maebashi Gunma Japan Chuo Electronics Company Limited Hachioji Tokyo Japan

This paper proposes a reduced-size and tunable 3dB branch-line hybrid. The proposed hybrid consists of short transmission lines with equal characteristic impedance and shunt lumped tuning capacitors. The authors fabricated the proposed hybrid on PTFE substrates at 2GHz. In the measurements, while tuning capacitance changes from 1.3pF to 2.7pF, center frequency shifted 1.8GHz to 2.4GHz, with -19.5dB return loss, ±0.3dB outputs amplitude difference, and 90±3° phase difference. These measurement results agree with analytical calculation accurately. In general, these hybrids are particularly useful for power dividers or power combiners in microwave circuit as balanced mixers, image-rejection mixers, and balanced amplifiers.

关键词： Tuning Capacitance Equations Capacitance measurement Couplings Frequency measurement Reflection

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Choice of the detection location in a three-party measurement-device-independent quantum key distribution system

Choice of the detection location in a three-party measuremen...

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Frontiers in Optics, FiO 2016

作者： Qiao, Yucheng Li, Zhengyu Chen, Ziyang Luo, Bin Peng, Xiang Guo, Hong State Key Laboratory of Advanced Optical Communication System and Network School of Electronics Engineering and Computer Science Center for Quantum Information Technology Peking University Beijing100871 China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications Beijing100876 China

We propose a method of choosing the detection location for a three-party measurement-device-independent quantum key distribution system, which can simplify the parameter optimization problem for practical applications... 详细信息

ISBN: (纸本)9781943580194

关键词： Quantum cryptography

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Computer-Assisted Quantitative Framework for Whole Slide Cervical Image Grading Driven by Time Series Features

SSRN

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SSRN 2023年

作者： Zhang, Chuanwang Jia, Dongyao Li, Ziqi Wu, Nengkai He, Zihao Institute of Advanced Control System School of Electronics and Information Engineering Beijing Jiaotong University Beijing100044 China

While thinprep cytologic test is the most commonly applied diagnosis approaches for cervical cancer, current detection results highly depend on specific category of cervical cells screened by cytotechnicians on the slides using optical microscopes, which lack robustness. In this paper, we proposed a time series based two-stage quantitative detection framework in whole slide cervical images that could be applied by pathologists to generate lesion grades on smear-level effectively. We designed a You Only Look Once network combined with attention module and integrated it with the multi-scale feature fusion to refine the representations and classify the cervical cells more accurately (precision of 0.8647 and true positive rate of 95.8%). We presented a quantitative description of DNA contents and combined it with Matthew effect to rectify their contributions to final diagnosis, which provides a clearer quantitative standard for the degree of cell proliferation. We extracted the time series features and generated the final grading results, and explained how we benefit from this framework to obtain a model which fully utilizes the global smear information, enhances the detection robustness, supplies the existing cervical screening system and is not easily influenced by the false classification of cervical cells (accuracy, sensitivity, and specificity of 0.9193, 0.9285, 0.9234 on smear-level). We clearly presented and expatiated the concepts of time series features in cervical cancer detection, and ensured that global information of each smear will be efficiently mined for final screening. Finally, we evaluated our solution on two real clinical slide datasets, highlighting the inner relationship between time series features and physiological states of patients, adapting it to be as easily integrated in current diagnosis system as possible, enriching existing detection principles and achieving a comparable cervical intraepithelial neoplasia grading accuracy to that of a pro

关键词： Grading

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