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检索条件"机构=Beijing Key Laboratory of Network System Architecture and Convergence SICE"

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Reflective Metasurface for Controlling the Beam Divergence Angles of Dual-mode OAM Waves 3

Reflective Metasurface for Controlling the Beam Divergence A...

引用

3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： He, Xiaoyuan Deng, Li Feng, Botao 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: (纸本)9781728190457

For dealing with the problem of receiving multimode orbital-angular momentum (OAM) waves resulting from different beam divergence angles of OAM waves with different topological charges, it is essential to control the beam divergence angles of OAM waves. In this paper, a method is proposed to control the beam divergence angles of multi-mode OAM waves without modifying the inherent topological charges by a reflective metasurface. Based on this method, a reflective metasurface is properly designed to generate dual-mode OAM waves with equal beam divergence angle. As a dual-mode OAM waves generator, the reflective metasurface is composed of 31x31 metal-insulator-metal elements which is capable to manipulate dual-polarized electromagnetic waves (EMWs) independently. Furthermore, as a beam divergence controller, the reflective metasurface is properly divided into two regions that are responsible for +1 mode and +3 mode OAM waves generations. In this way, dual-mode OAM waves with equal beam divergence angle can be generated by the proposed reflective metasurface. The proposed design provides an efficient technology to control the beam divergence angles of multi-mode OAM waves flexibly, which is conductive to simplify the receiving device in OAM based communication systems. © 2020 IEEE.

关键词： Topology

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Use OFDM in OAM Communication to Redcuce Multi-path Effects 3

Use OFDM in OAM Communication to Redcuce Multi-path Effects

引用

3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： Shu, Jingyue Deng, Li Li, Shufang Feng, Botao 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: (纸本)9781728190457

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. © 2020 IEEE.

关键词： Orthogonal frequency division multiplexing

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An Omni-directional Array Antenna with a Feeding Structure in Series 3

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

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3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： Liu, YaQi Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781728190457

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. © 2020 IEEE.

关键词： Antenna arrays

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A Novel Omni-directional Antenna with Low Gain Variations for WiFi Communications 3

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

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3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： Deng, Wucai Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781728190457

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. © 2020 IEEE.

关键词： Microstrip antennas

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A Wideband Omni-directional Antenna Based on Printed Log-Periodic Element 3

A Wideband Omni-directional Antenna Based on Printed Log-Per...

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3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： Li, Liangying Yan, Wei Feng, Botao Deng, Li College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781728190457

In this paper, a novel omni-directional antenna with wideband and low cross-polarization for GSM1800/3G/LTE/5G indoor communication systems is proposed. By using the printed log-periodical antenna elements, which are evenly arranged around the center, the proposed antenna achieves the omnidirectional radiation patterns. Moreover, with the cooperation of the log-periodical antenna and the annular parasitic patches, a wide bandwidth and a good omnidirectional radiation performance are achieved simultaneously. Simulated results indicate that an impedance bandwidth of 1.7-3.8 GHz (76.4%) can be achieved with a gain of approximately 1.5 dBi across the whole operating frequency. Low cross-polarization level of less than-30 dB and compact size are also acquired. © 2020 IEEE.

关键词： Electric impedance

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A Wide-Beamwidth Magneto-Electric Dipole Antenna with Low Cross-Polarization and High Front-to-Back Ratio 3

A Wide-Beamwidth Magneto-Electric Dipole Antenna with Low Cr...

引用

3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

ISBN: (纸本)9781728190457

A novel magneto-electric (ME) dipole antenna is presented in this paper, which owns the characteristics of low cross polarization level and high front-to-back ratio (FBR) for the Sth-generation (5G) indoor communications is described. By dividing the conventional patches into two pairs of rectangle patches and four pieces of parasitic patches, the current which produces cross-polarization can be offset. Furthermore, the vertical fence can effectively widen the beamwidth of antenna. Experiment results demonstrate that a broad frequency bandwidth of 3.3-4.2 GHz (24%) can be achieved for 5G communications. Besides, a cross-polarization level below-20 dB and a FBR level of approximately 26 dB in the operating bands. Noting that a wide beamwidth of 100° for E-plane and H-plane is also obtained. © 2020 IEEE.

关键词： Polarization

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

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

引用

3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

作者： Li, Haoming Cao, Wenhua Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781728190457

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 λ0 (where λ0 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. © 2020 IEEE.

关键词： Omnidirectional antennas

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A Compact Dual-Polarized Differentially-Fed Antenna with High Gain for 5G Microcells 3

A Compact Dual-Polarized Differentially-Fed Antenna with Hig...

引用

3rd IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2020

ISBN: (纸本)9781728190457

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 λ0 (where λ0 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. © 2020 IEEE.

关键词： 5G mobile communication systems

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A dual-polarized zhe-shaped conformal patch antenna for 5G millimeter-wave applications 4

A dual-polarized zhe-shaped conformal patch antenna for 5G m...

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4th IEEE International Conference on Electronic Information and Communication Technology, ICEICT 2021

作者： Yang, Baifa Huang, Haixuan Feng, Botao Deng, Li College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China College of Big Data and Internet Shenzhen Technology University Shenzhen518118 China College of Electronics and Information Engineering Shenzhen University Shenzhen518060 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9781665432030

We propose a dual-polarized conformal Zhe-shaped patch antenna that is suitable for future millimeter wave (mmW) applications. The proposed antenna is composed of 3 different layers. A Zhe-shaped (喆) patch is printed on the upper surface of the top dielectric layer. In order to excite the Zhe-shaped radiating patch, two feeding networks are designed in the other two layers. The simulation result shows that a frequency bandwidth of 10.5% (24.75-27.5 GHz) and a good isolation performance ( © 2021 IEEE

关键词： Microstrip antennas

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SIC-based Precoding Scheme with Sub-connected architecture for MIMO VLC systems

SIC-based Precoding Scheme with Sub-connected Architecture f...

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GLOBECOM 2022 - 2022 IEEE Global Communications Conference

作者： Congcong Wang Yang Yang Zhaohui Yang Chunyan Feng Zhongzheng Tang Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Department of Electronic and Electrical Engineering University College London London U.K. School of Science Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781665435413

High spatial correlation is one of the main factors limiting the communication performance of multiple-input multiple-output (MIMO) visible light communication (VLC), which can be alleviate by precoding. However, most existing precoding algorithms require a dedicated baseband chain for each light emitting diode (LED), which may result in high energy consumption and hardware complexity, especially when LEDs are densely deployed. To solve this issue, a successive interference cancellation-based precoding scheme with sub-connected architecture (SIC-SA) is proposed, where each baseband chain is connected to an LED sub-array. In this case, since the SIC-based precoding can only determine the signal of each baseband chain for an LED sub-array, the electrical/optical power of each LED must be jointly optimized to alleviate the spatial correlation among individual LEDs. This joint SIC-based precoding, power allocation and direct current offset design problem is formulated as an achievable sum rate maximization problem under dimming control and electrical power constraints. To solve this problem, the original problem is separated into two subproblems. In the first subproblem, the SIC-based precoding is calculated by successive null space computation. With the obtained SIC-based precoding, the second subproblem optimizes the power allocation and direct-current offset. Finally, these two subproblems are iteratively solved to obtain a convergent solution. Simulation results demonstrate that the proposed SIC-SA achieves 0.1306 bps/Hz/W and 0.1340 bps/Hz/W improvements in terms of energy efficiency compared to minimum mean square error precoding with fully-connected architecture (FA) and zero-forcing precoding with FA, respectively, when the signal-to-noise ratio is 30 dB.

关键词： Baseband Correlation Precoding Simulation Computer architecture Light emitting diodes Energy efficiency

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