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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： Haoming Li Wenhua Cao Botao Feng Li Deng College of Electronics and Information Engineering Shenzhen University Shenzhen China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

A compact dual-polarized differentially-fed antenna with high gain is proposed for 5G microcells. The antenna mainly consists of two parts: a radiating element with metasurface and a differentially-fed network. The metasurface with four square cells is etched on the top layer, while the radiating octagonal patch etched with four fan-shaped slots is placed on the second layer. The profile of the antenna is 0.125 λ 0 (where λ 0 is the starting wavelength). Simulation results show that the overlapped bandwidths are 3.30-3.61 GHz and 4.72-5.07 GHz, and their corresponding gains vary from 8.30 to 9.65 dBi.

关键词： 5G mobile communication Simulation Conferences Microcell networks Metasurfaces Information and communication technology Antennas

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An Omni-directional Array Antenna with a Feeding Structure in Series

An Omni-directional Array Antenna with a Feeding Structure i...

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： YaQi Liu Botao Feng Li Deng College of Electronics and Information Engineering Shenzhen University Shenzhen China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

An omni-directional broad-band microstrip array antenna is proposed in this work. The serial feed and antenna array technology are combined to design an antenna array which can satisfy the demands of both omni-directionality in H-plane and high gain. The radiating patches are printed on dual sides of a printed circuit board (PCB) with an overall size of 128 mm × 7.5 mm × 1 mm. An operating bandwidth of 1975 MHz (5.15-7.125 GHz) is achieved, which is suitable for WiFi-6 wireless communication systems.

关键词： Wireless communication Microstrip antenna arrays Printed circuits Microstrip antennas Antenna feeds Information and communication technology Microstrip

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A Dual-Polarized Omnidirectional Antenna with High Isolation for 2G/3G/LTE/5G Scenarios

A Dual-Polarized Omnidirectional Antenna with High Isolation...

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

This paper presents a dual polarized omnidirectional antenna with high isolation for 3G/LTE/5G scenarios. The antenna is comprised of two parts: a vertically polarized radiating element composed of 3 copper patches and a horizontally polarized radiating element composed of 4 printed dipoles and a four-way power divider. The overall profile height of the antenna is 0.3 λ 0 (where λ 0 is the starting wavelength). Simulation results show that the overlapped bandwidth between horizontal polarization (HP) and vertical polarization (VP) is 1.66-3.65 GHz, and the isolation is less than -42 dB. Moreover, low gain variations within 3 dB in both VP and HP directions can also be attained, which means good omni-directional characteristics.

关键词： Power dividers Dipole antennas Simulation Omnidirectional antennas Information and communication technology Copper Gain

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A Novel Omni-directional Antenna with Low Gain Variations for WiFi Communications

A Novel Omni-directional Antenna with Low Gain Variations fo...

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： Wucai Deng Botao Feng Li Deng College of Electronics and Information Engineering Shenzhen University Shenzhen China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

An omni-directional monopole antenna with low gain variations is presented for Wireless Fidelity (WiFi) communications in this paper. Compared with the conventional microstrip antenna, the novel patch antenna with simple structure shows good performance in the aspects of high gain and low gain variations. Within ±1dB gain variations, dual bandwidths of 2.41GHz-2.57 GHz (6.4%) and 2.87 GHz-3.77 GHz (27.1%) are achieved for WIFI communication systems. To acquire the dual-band and omni-directional characteristics, the rectangular patch etched with an annular-ring slot is employed. Owing to the coplanar waveguide (CPW) feeding structure, the proposed antenna has an excellent performance of a stable gain of 2±0.5 dBi.

关键词： Patch antennas Dual band Microstrip antennas Coplanar waveguides Information and communication technology Microstrip Wireless fidelity

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Uav trajectory and communication co-design: flexible path discretization and path compression

arXiv

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arXiv 2020年

作者： Guo, Yijun You, Changsheng Yin, Changchuan Zhang, Rui Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications China Department of Electrical and Computer Engineering National University of Singapore Singapore

The performance optimization of UAV communication systems requires the joint design of UAV trajectory and communication efficiently. To tackle the challenge of infinite design variables arising from the continuous-time UAV trajectory optimization, a commonly adopted approach in the existing literature is by approximating the UAV trajectory with piecewise-linear path segments connected via a finite number of waypoints in three-dimensional (3D) space. However, this approach may still incur prohibitive computational complexity in practice when the UAV flight period/distance becomes long, as the distance between consecutive waypoints needs to be kept sufficiently small to retain high approximation accuracy. To resolve this fundamental issue, we propose in this paper a new and general framework for UAV trajectory and communication co-design with flexible number of waypoint optimization variables (called designable waypoints) or their sub-path representations. First, we propose a flexible path discretization scheme that optimizes only a number of selected waypoints (designable waypoints) along the UAV path for complexity reduction, while all the designable and non-designable waypoints are used in calculating the approximated communication utility along the UAV trajectory for ensuring high trajectory discretization accuracy. Next, given any number of designable waypoints, we propose a novel path compression scheme where the UAV 3D path is first decomposed into three one-dimensional (1D) sub-paths and each sub-path is then approximated by superimposing a number of selected basis paths (which are generally less than the number of designable waypoints) weighted by their corresponding path coefficients, thus further reducing the path design complexity. Finally, we provide a case study on UAV trajectory design for aerial data harvesting from distributed ground sensors, and numerically show that the proposed flexible path discretization and path compression schemes can significa

关键词： Unmanned aerial vehicles (UAV)

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Wireless Channel Modeling, Simulation and Analysis for Electronic Registration Identification of Vehicles

Wireless Channel Modeling, Simulation and Analysis for Elect...

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： Tingxiao Cai Wenmin Fan Jing Feng Weijun Hong China Electronics Standardization Institute Beijing China Beijing Laboratory of Advanced Information Network Beijing University of Posts and Telecommunications Beijing China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

Electronic registration identification (ERI) of the motor vehicle is an important application of passive radio frequency identification (RFID) in the field of intelligent transportation which has been put into use in some countries. ERI is in the pilot research stage now in China, but the release of the standard is accelerating its promotion. The performance evaluation of car-related RFID products is often accomplished by test and trial method currently. The test results are seriously affected by irrelevant environmental factors, making it impossible to carry out scientific repeatable experiments. In this paper, the communication channel model of ERI system in the highway traffic scene is modeled based on the ray tracing method. In order to accurately establish the model, we conducted a simulation analysis on the influence of factors such as antenna pattern, polarization mode, ground material, and environmental noise on the received signal power and tag reading distance. Files generated based on the model in this article can be loaded onto the channel simulator, so as to build an ERI test system with reproducible test results which has important application value.

关键词： Wireless communication Analytical models Working environment noise Ray tracing Object recognition Load modeling Radiofrequency identification

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Channel Model for RFID based Electronic Registration Identification of the motor vehicle in Practical Open Transportation Scenario

Channel Model for RFID based Electronic Registration Identif...

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： Jing Feng Wenmin Fan Weijun Hong Tingxiao Cai Chunteng Shi Jitianbai Zhou China Electronics Standardization Institute Beijing China Beijing Laboratory of Advanced Information Network Beijing University of Posts and Telecommunications Beijing China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

Current researches on communication channel of electronic registration identification of the motor vehicle (ERI) are mostly based on the single lane two channel model, which is not consistent with the multi-lane multi-car scene in the practical application. In this paper, a channel model combined with deterministic and stochastic component is firstly proposed for ERI. The theoretical formula of the model is derived and simulated. The influence of Doppler shift on each transmission path in the channel model and the effect of adjacent lane reflection path on channel fading is analyzed in detail. The work of this paper is with great significance for evaluation of ERI system in practical scenario.

关键词： Fading channels Roads Transportation Stochastic processes Reflection Channel models Antennas

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Joint resource management for MC-NOMA: A deep reinforcement learning approach

arXiv

引用

arXiv 2021年

作者： Wang, Shaoyang Lv, Tiejun Ni, Wei Beaulieu, Norman C. Guo, Y. Jay Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China Sydney2122 Australia Beijing Key Laboratory for Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing100876 China Global Big Data Technologies Centre University of Technology Sydney UltimoNSW2007 Australia

This paper presents a novel and effective deep reinforcement learning (DRL)-based approach to addressing joint resource management (JRM) in a practical multi-carrier non-orthogonal multiple access (MC-NOMA) system, where hardware sensitivity and imperfect successive interference cancellation (SIC) are considered. We first formulate the JRM problem to maximize the weighted-sum system throughput. Then, the JRM problem is decoupled into two iterative subtasks: subcarrier assignment (SA, including user grouping) and power allocation (PA). Each subtask is a sequential decision process. Invoking a deep deterministic policy gradient algorithm, our proposed DRL-based JRM (DRL-JRM) approach jointly performs the two subtasks, where the optimization objective and constraints of the subtasks are addressed by a new joint reward and internal reward mechanism. A multi-agent structure and a convolutional neural network are adopted to reduce the complexity of the PA subtask. We also tailor the neural network structure for the stability and convergence of DRL-JRM. Corroborated by extensive experiments, the proposed DRL-JRM scheme is superior to existing alternatives in terms of system throughput and resistance to interference, especially in the presence of many users and strong inter-cell interference. DRL-JRM can flexibly meet individual service requirements of users. © 2021, CC BY.

关键词： Resource allocation

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Optimization of User Selection and Bandwidth Allocation for Federated Learning in VLC/RF systems

Optimization of User Selection and Bandwidth Allocation for ...

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IEEE Conference on Wireless Communications and networking

作者： Chuanhong Liu Caili Guo Yang Yang Mingzhe Chen H. Vincent Poor Shuguang Cui Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Beijing Laboratory of Advanced Information Networks School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Princeton University Princeton NJ USA The Future Network of Intelligence Institute The Chinese University of Hong Kong Shenzhen China Shenzhen Research Institute of Big Data The Chinese University of Hong Kong Shenzhen China

ISBN: (纸本)9781728195056;9781728195063

Limited radio frequency (RF) resources restrict the number of users that can participate in federated learning (FL) thus affecting FL convergence speed and performance. In this paper, we first introduce visible light communication (VLC) as a supplement to RF in FL and build a hybrid VLC/RF communication system, in which each indoor user can use both VLC and RF to transmit its FL model parameters. Then, the problem of user selection and bandwidth allocation is studied for FL implemented over a hybrid VLC/RF system aiming to optimize the FL performance. The problem is first separated into two subproblems. The first subproblem is a user selection problem with a given bandwidth allocation, which is solved by a traversal algorithm. The second subproblem is a bandwidth allocation problem with a given user selection, which is solved by a numerical method. The final user selection and bandwidth allocation are obtained by iteratively solving these two subproblems. Simulation results show that the proposed FL algorithm that efficiently uses VLC and RF for FL model transmission can improve the prediction accuracy by up to 10% compared with a conventional FL system using only RF.

关键词： Radio frequency Training Simulation Bandwidth Channel allocation Predictive models Collaborative work

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Use OFDM In OAM Communication to Redcuce Multi-path Effects

Use OFDM In OAM Communication to Redcuce Multi-path Effects

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IEEE International Conference on Electronic Information and Communication Technology (ICEICT)

作者： Jingyue Shu Li Deng Shufang Li Botao Feng Beijing Laboratory of Advanced Information Networks Beijing Key Laboratory of Network System Architecture Convergence Beijing University of Posts and Telecommunications Beijing China College of Electronics and Information Engineering Shenzhen University Shenzhen China

ISBN: (数字)9781728190457

ISBN: (纸本)9781728190464

The orbital angular momentum (OAM) has raised great attention for its potential to enhance the capacity of wireless communication system. The performance of OAM communication is dependent on the accuracy of phase information. In multi-path channel, the accuracy is destroyed. In this paper, we use orthogonal frequency division multiplexing (OFDM)before OAM modulation to enhance communication performance.

关键词： Wireless communication OFDM Conferences Modulation Orbits Information and communication technology

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