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Global Symposium on Millimeter Waves, GSMM

作者： Mengyuan Chu Zhiqi Ke Kai Lu Nan Yang School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Guangzhou China

ISBN: (数字)9798350384956

ISBN: (纸本)9798350384963

This paper presents a broadband millimeter-wave planar magnetoelectric (ME) dipole antenna. By intro-ducing an E-shaped feeding branch underneath the main radiating patch, a broadband ME dipole antenna with an ultra-low profile of $0.086\lambda_{0}$ (where $\lambda_{0}$ represents the free-space) is obtained. A simulated impedance bandwidth of 19.3% (23.4-28.4 GHz) is obtained from the proposed antenna. Across the impedance bandwidth, the ME dipole also shows good radiation characteristics.

关键词： Dipole antennas Magnetoelectric effects Antenna-in-package Bandwidth Antenna feeds Broadband communication Broadband antennas

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Pattern-diversity Dielectric Resonator Antenna with TM01δ Mode and Hybrid HEM11δ Mode

Pattern-diversity Dielectric Resonator Antenna with TM01δ M...

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Progress in Electromagnetic Research Symposium (PIERS)

作者： Shuhao Hu Nan Yang Kai Lu Peng Fei Hu Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems School of Electronics and Information Technology Sun Yat-Sen University Guangzhou China

ISBN: (数字)9798350375909

ISBN: (纸本)9798350375916

A pattern-diversity cylindrical dielectric resonator (DR) antenna (DRA) is presented in this paper. HEM 113 mode and TM 011 mode can be incorporated for unidirectional and omnidirectional radiations. Slots in the ground are used to excite these two modes without the need of a conventional vertical probe, namely planar feeding networks. To verify the proposed idea, a prototype is designed, fabricated, and measured. Its measured overlapping 10dB impedance bandwidth is 7.6%, which is enough for a 5.25GHz WLAN application.

关键词： Antenna measurements Wireless LAN Circuits Prototypes Bandwidth Dielectric resonator antennas Dielectric measurement

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Photon-Limited Image Recovery with Fourier Convolution Network

Photon-Limited Image Recovery with Fourier Convolution Netwo...

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CLEO: Science and Innovations, S and I 2022

作者： Qin, Wentao Shi, Jianhong Wu, Xiaoyan Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai200240 China

We propose and validate a deep learning based algorithm for recovering images from their photon-limited samples. The method can be applied to complicated images and is able to retain most of the details. © Optica... 详细信息

ISBN: (纸本)9781557528209

关键词： Photons

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FASTC: A Fast Attentional Framework for Semantic Traversability Classification Using Point Cloud

arXiv

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arXiv 2024年

作者： Chen, Yirui Wei, Pengjin Liu, Zhenhuan Wang, Bingchao Yang, Jie Liu, Wei Institute of Image Processing and Pattern Recognition Department of Automation Shanghai Jiao Tong University China Key Laboratory of System Control and Information Processing Ministry of Education China

Producing traversability maps and understanding the surroundings are crucial prerequisites for autonomous navigation. In this paper, we address the problem of traversability assessment using point clouds. We propose a novel pillar feature extraction module that utilizes PointNet to capture features from point clouds organized in vertical volume and a 2D encoder-decoder structure to conduct traversability classification instead of the widely used 3D convolutions. This results in less computational cost while even better performance is achieved at the same time. We then propose a new spatio-temporal attention module to fuse multi-frame information, which can properly handle the varying density problem of LIDAR point clouds, and this makes our module able to assess distant areas more accurately. Comprehensive experimental results on augmented Semantic KITTI and RELLIS-3D datasets show that our method is able to achieve superior performance over existing approaches both quantitatively and quantitatively. Our code is publicly available at https://***/chenyirui/FASTC. © 2024, CC BY.

关键词： Semantics

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Named Entity Recognition of Electronic Medical Records based on BERT-BiLSTM-Biaffine Model

Named Entity Recognition of Electronic Medical Records based...

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2023 Asia-Pacific Conference on Image processing, Electronics and Computers, IPEC 2023

作者： Wang, Peng Gu, Jinguang Institute of Computer Science and Technology Wuhan University of Science and Technology Wuhan China Hubei Prov. Key Laboratory of Intelligent Information Processing and Real Time Industrial Systems Wuhan University of Science and Technology Wuhan China

In the case of the specific task of identifying named entities within electronic medical record, it is hard to determine the boundary of nested entities, and existing NER systems have insufficient decoding performance. Based on the pre training model BERT, this paper introduces a novel network structure called Biaffine Layer using a bidirectional LSTM layer. The network uses a dual affine attention mechanism for semantic information learning, which can better interact with the semantic information of entity heads and entity tails, thereby achieving better recognition results for entities. Due to the sparsity of named entity datasets and the uneven distribution of entity categories, traditional binary cross entropy loss functions require multiple rounds of training to decode entities. In this paper, we have modified the binary cross entropy loss function to make the proposed model faster decode the entities that need to be identified. The model performs well, according to the experimental findings. The approach suggested in this paper offers a fresh approach to the NER issue raised by electronic medical records, and it is anticipated to considerably boost the effectiveness and caliber of clinical medical research. © Published under licence by IOP Publishing Ltd.

关键词： Decoding

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A Wideband Bowtie Antenna Fed with CPW for 5G mmWave Applications

A Wideband Bowtie Antenna Fed with CPW for 5G mmWave Applica...

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Global Symposium on Millimeter Waves, GSMM

作者： Yunyi Jiang Zhiqi Ke Kai Lu Nan Yang School of Electronics and Information Technology and Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Guangzhou China

ISBN: (数字)9798350384956

ISBN: (纸本)9798350384963

In recent years, millimeter wave (mmWave) antennas have garnered considerable attention, especially in the realm of 5G applications. This study introduces a compact wideband planar bowtie antenna designed specifically for 5G mmWave communications. The antenna consists of a pair of bowtie patches that are fed by a grounded co-planar waveguide (GCPW). Notably, this design requires only two thin substrate layers. Simulation results demonstrate that the antenna offers a broad bandwidth of 33.35% (34.62–47.96 GHz) and achieves a realized gain of 6.25 dBi at 40 GHz.

关键词： 5G mobile communication Simulation Coplanar waveguides Broadband antennas Millimeter wave communication Wideband Substrates

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CompQoTE: Generalizing QoT Estimation with Composable ML and End-to-End Learning

CompQoTE: Generalizing QoT Estimation with Composable ML and...

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2023 Optical Fiber Communications Conference and Exhibition, OFC 2023

作者： Gao, Hanyu Chen, Xiaoliang Sun, Lu Li, Zhaohui Sun Yat-sen University Guangdong Provincial Key Labratory of Optoelectronic Information Processing Chips and Systems School of Electronics and Information Technology Guangzhou China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai China State Grid Information & Telecommunication Group Co. Ltd Beijing China

This paper proposes CompQoTE, a composable QoT estimation design with end-to-end learning capability. Results show CompQoT can generalize arbitrary lightpaths while achieving > 90% estimation accuracy for unseen li...

ISBN: (纸本)9781957171180

关键词：

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Wideband L-Probe Fed Antenna-in-Package Module for Millimeter-Wave Radar

Wideband L-Probe Fed Antenna-in-Package Module for Millimete...

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IEEE Conference on Antenna Measurements & Applications (CAMA)

作者： Zheng Fang Kai Lu Nan Yang Shaoyong Zheng Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems School of Electronics and Information Technology Sun Yat-sen University Guangzhou China

ISBN: (数字)9798350386929

ISBN: (纸本)9798350350746

A wideband L-probe fed antenna-in-package ( $A$ iP) module for 60-GHz short-range radar applications is proposed in this work. This module comprises two close identical patch antennas, serving as the transmitter and the receiver. Each antenna element is a cavity-backed patch fed with an L-probe. The antenna module has a wide impedance bandwidth of 17.9 % (56.0-67.0 GHz) and stable radiation patterns across the operating band. By rotating both antennas by 45°, their mutual coupling level is significantly reduced. The $A$ iP module is evaluated through system-level simulation in a multi-target ranging scenario. A high level of range resolution can be obtained with this module, making it a good candidate for short-range millimeter-wave radar systems.

关键词： Antenna measurements Transmitters Patch antennas Antenna-in-package Millimeter wave radar Radar antennas Distance measurement Impedance Wideband Antenna radiation patterns

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Dual-Band Diversity Glass Antenna for WiFi Applications

Dual-Band Diversity Glass Antenna for WiFi Applications

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2023 Cross Strait Radio Science and Wireless Technology Conference, CSRSWTC 2023

作者： Hu, Peng Fei Leung, Kwok Wa School of Electronics and Information Technology Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen University Guangzhou510006 China City University of Hong Kong State Key Laboratory of Terahertz and Millimeter Waves Department of Electrical Engineering Hong Kong Hong Kong Information and Communication Technology Centre CityU Shenzhen Research Institute Shenzhen518057 China

ISBN: (纸本)9798350358971

A dual-band polarization-diversity omnidirectional glass antenna is presented in this paper. A stepped glass dielectric resonator (DR) is fed by a probe and dual loops for vertical and horizontal polarizations, respectively. This antenna is designed in the 2.4 GHz and 5.8 GHz WiFi bands, with available bandwidths of 7.5% (2.31-2.49 GHz) and 6.5% (5.04-5.38 GHz). Two DR TM modes and two DR TE modes are used to obtain omnidirectional radiation patterns. © 2023 IEEE.

关键词： dielectric resonator antenna Glass antenna omnidirectional antenna

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Noise Shaping Enabled Signal Generation with Low-resolution Digital-to-Analog Converter in Optical Interconnects

Noise Shaping Enabled Signal Generation with Low-resolution ...

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IEEE Conference on Global Communications (GLOBECOM)

作者： Wei Wang Fan Li Mingzhu Yin Weihao Ni School of Electronics and Information Technology Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-Sen University Guangzhou China

ISBN: (数字)9798350351255

ISBN: (纸本)9798350351262

Digital-to-analog converter (DAC) plays an important role in a communication system, which determines the quality of the generated signal. A high-resolution DAC is necessary to guarantee the system performance. However, the application of a high-resolution DAC results in high system cost and power consumption, which is incompatible with the future low-cost data centers. To be cost-effective and energy-efficient, a system with low-resolution DAC and negligible quantization noise induced performance degradation is highly desirable. Noise shaping (NS) technique is proposed to effectively suppress the quantization noise induced by low-resolution DAC. In this paper, we review the principle of the NS technique, and its effectiveness is investigated experimentally in 100 Gb/s intensity modulation and direct detection (IM/DD) PAM-4 system with low-resolution DAC. The experimental results show that the system with 4-bit DAC coupled with NS technique shows almost the same receiver sensitivity as the system with 8-bit DAC without NS technique over 2-km and 10-km single mode fiber (SMF) transmission in O-band. It indicates that significant performance improvement can be achieved by using NS technique in low-resolution DAC systems, and it is a promising solution for future low-cost data centers.

关键词： Data centers Quantization (signal) Optical interconnections Digital-analog conversion System performance Noise Energy efficiency Noise shaping Intensity modulation Signal resolution

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