检索结果-内蒙古大学图书馆

A Novel Pattern Recognition Method for Self-Powered TENG Sensor Embedded to the Robotic Hand

ieee ACCESS 2025年 13卷 14101-14112页

作者： Balapan, Azat Yeralkhan, Rauan Aryslanov, Alikhan Kalimuldina, Gulnur Yeshmukhametov, Azamat Nazarbayev Univ Dept Robot Engn Astana 010000 Kazakhstan Nazarbayev Univ Dept Mech & Aerosp Engn Astana 010000 Kazakhstan Nazarbayev Univ Inst Smart Syst & Artificial Intelligence Astana 010000 Kazakhstan

This paper presents the development and implementation of a human-like robotic hand integrated with advanced triboelectric nanogenerator (TENG) based tactile sensors for shape and material recognition. Meanwhile, traditional piezo sensors' effectiveness is limited, sensitive to the temperature, and the manufacturing cost is high. TENG sensors offer a self-powered alternative with simplified circuitry, cost-effective fabrication, and enhanced durability. To capitalize on these benefits, we propose a novel machine learning approach that represents time-series data as two-dimensional images processed using a two-dimensional convolutional neural network (2D CNN). This method is compared against the traditional one-dimensional convolutional neural network (1D CNN) method. The research methodology encompasses TENG sensor preparation, noise cancellation, robotic hand design, and control electronics. Experimental results demonstrate that the proposed 2D CNN method significantly improves shape and material recognition accuracy, achieving 98% and 99%, respectively, compared to 94% and 98% with the 1D CNN method. Real-time evaluation further validates the robustness and adaptability of the proposed model in unstructured environments. These findings underscore the potential of integrating TENG sensors with advanced neural network architectures for autonomous dexterous manipulation in various industrial applications, paving the way for future advancements in robotic tactile sensing.

关键词： Robot sensing systems Hands Thumb Shape Sensors Data collection Tactile sensors Data visualization Convolutional neural networks Carbon Dataset collection machine learning robot hand design signal processing TENG sensor

来源：评论

学校读者我要写书评

暂无评论

Underdetermined AOA Estimation Using Non-Uniform Sub-Connected Hybrid Beamforming systems

IEEE OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY

引用

ieee OPEN JOURNAL OF THE COMMUNICATIONS SOCIETY 2025年 6卷 1485-1496页

作者： Liu, Yu-Chen Su, Hsuan-Jung Takano, Yasuhiro Natl Taiwan Univ Grad Inst Commun Engn Taipei 10617 Taiwan Chitose Inst Sci & Technol Dept Informat Syst Engn Chitose Hokkaido 0668655 Japan

Hybrid beamforming (HBF) is emerging as a key technology for future wireless networks, particularly in millimeter wave (mmWave) bands. In this paper, we present a non-uniform sub-connected hybrid beamforming (NSC-HBF) system that enables the implementation of the difference co-array for the underdetermined angle-of-arrival (AOA) estimation. We propose a broad beam synthesis technique to mitigate performance degradation caused by uneven analog combining gains. To further enhance estimation efficiency, we modified the co-array least mean squares (co-array LMS) method by directly solving the least-squares problem to determine the filter weights. The proposed method reduces computational complexity and eliminates iterative procedures for faster processing. Our numerical results demonstrate the pseudo-spectrum and detection performance for both pencil and broad beams, highlighting the importance of analog combining codebook design. Additionally, the proposed method achieves higher estimation accuracy compared to the co-array root-LMS.

关键词： Estimation Antenna arrays Array signal processing Vectors Radio frequency Covariance matrices Computer architecture Structural beams Computational complexity Millimeter wave communication Nested array HBF NSC-HBF underdetermined AOA estimation

来源：评论

学校读者我要写书评

暂无评论

CSD-Driven Speedup in RISC-V Processor 18th

CSD-Driven Speedup in RISC-V Processor

引用

18th International workshop on design and Architecture for signal and Image processing, DASIP 2025

作者： Ebrahimiazandaryani, Farhad Fey, Dietmar Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen91058 Germany

ISBN: (纸本)9783031878961

This paper introduces a synthesizable μ-architectural design method to boost the performance of a given RISC-V processor architecture by utilizing Canonical Signed Digit (CSD) representation during the execution stage within the processor pipeline. CSD is a unique ternary number system that enables carry/borrow-free addition/subtraction in constant time O(1) regardless of word length N. The CSD extension is exemplarily demonstrated to the Potato processor, a simple RISC-V implementation for FPGAs. However, the method can also be applied to other implementations in principle. Our performance boost due to the CSD requires an overhead for conversion between binary and CSD representation. This overhead is compensated by an extension to a seven-stage pipeline architecture, featuring a three-step execution stage that increases the throughput and the operating frequency and enables loop unrolling, which is especially advantageous in applications with consecutive calculations, e.g., signal processing. By experimental results, we compared our CSD-based ternary solution to the original implementation, which utilizes the usual pure binary number representation of the operands. Our approach achieved a 2.41X increase in operating frequency over the original RISC-V processor on FPGA, with over 20% of this gain attributed to the CSD encoding. This enhancement resulted in up to a 2.40X improvement in throughput and a 2.37X reduction in execution time for computation-intensive benchmark applications. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Pipeline processing systems

来源：评论

学校读者我要写书评

暂无评论

RIS-Assisted ISAC systems for Robust Secure Transmission with Imperfect Sense Estimation

引用

ieee Transactions on Wireless Communications 2025年第5期24卷 3979-3992页

作者： Jiang, Chengjun Zhang, Chensi Huang, Chongwen Ge, Jianhua Niyato, Dusit Yuen, Chau Xidian University State Key Laboratory of Integrated Service Networks Xi'an710071 China Zhejiang University College of Information Science and Electronic Engineering Hangzhou310027 China Zhejiang Provincial Key Laboratory of Multi-Modal Communication Networks and Intelligent Information Processing Hangzhou310027 China Nanyang Technological University College of Computing and Data Science Singapore Singapore Nanyang Technological University School of Electrical and Electronics Engineering Singapore Singapore

In this paper, we investigate reconfigurable intelligent surface (RIS)-assisted integrated sensing and communication (ISAC) systems for robust physical layer security (PLS) schemes. Traditionally, eavesdroppers (Eves) typically avoid interacting with the base station, making it challenging to obtain their relevant information, which limits the implementation of PLS. Fortunately, the sensing information obtained by ISAC can contribute to the design of PLS. Therefore, leveraging imperfect sensing estimation and employing dedicated radar signals as artificial noise, we formulate an RIS-assisted joint active and passive beamforming design problem to maximize the sum secrecy rate while satisfying the user's quality of service constraints, the transmission power constraints, and the sensing signal strength requirements. To make the problem tractable, we first derive the bound for Eve's channel state information uncertainty region based on security approximations. Subsequently, we employ the S-procedure and the symbolic-deterministic methods to transform the infinite number of inequalities. We then utilize the first-order Taylor expansion, the second-order cone methods, and the successive convex approximation to address the nonconvexity problem, leading to an efficient suboptimal solution obtained by an iterative algorithm. Finally, the simulation results demonstrate the significant potential of the sensing function in enhancing security and the effectiveness of the proposed robust scheme in flexibly balancing communication and sensing quality. © 2002-2012 ieee.

关键词： Iterative methods

来源：评论

学校读者我要写书评

暂无评论

implementation and Validation of a Comprehensive, Noise-Aware FMCW Radar Simulation Framework

引用

ieee Sensors Journal 2025年第9期25卷 15235-15246页

作者： Ubezio, Barnaba Sambath, Praanesh Eryildirim, Abdulkadir Zangl, Hubert University of Klagenfurt Institute of Smart Systems Technologies Klagenfurt9020 Austria Joanneum Research Robotics Klagenfurt9020 Austria Infineon Technologies Austria AG Graz8020 Austria

Complete simulation environments for automotive scenarios require simulated sensor data. The widespread use of vision sensors led to the availability of comprehensive simulations of their measurements. The same level of detail is hardly attained for frequency-modulated continuous wave (FMCW) radar sensors, despite their numerous advantages in automotive applications. Standard radar simulations, in fact, solely focus on their ultimate output, i.e., point clouds with velocity information. Most state-of-the-art tools based on image-rendering and ray-tracing do not treat one or more important characteristics, such as reflection intensities, multiple antennas, and noise impairments. We present a comprehensive and high-fidelity simulation framework for FMCW radars, where images from an RGB-D camera model in the Unity game engine are manipulated to generate 3-D time-domain radar measurements. In addition, the framework provides thermal and phase noise (PN) modeling, radiation patterns, and corresponding LiDaR-like point clouds for ground truth. signal processing techniques are performed on the generated data in the same way as on a real sensor, so that standard radar output is provided. The simulated data are compared and validated with real measurements collected in a parking garage, showing the accurate reproducibility of multiple scenarios. The overall characteristics of the proposed simulation are also compared with other simulator software in the literature. © 2001-2012 ieee.

关键词： Phase noise

来源：评论

学校读者我要写书评

暂无评论

Proto2Testbed: Towards an Integrated Testbed for Evaluating End-to-End Security Protocols in Satellite Constellations 12

Proto2Testbed: Towards an Integrated Testbed for Evaluating ...

引用

12th Advanced Satellite Multimedia systems Conference and the 18th signal processing for Space Communications workshop, ASMS/SPSC 2025

作者： Ottens, Martin Deutschmann, Jörg Hielscher, Kai-Steffen German, Reinhard Friedrich-Alexander-Universität Erlangen-Nürnberg Computer Networks and Communication Systems Erlangen Germany

ISBN: (纸本)9798331522353

There are many approaches to testbed systems in computer networks, but especially when evaluating or developing new security protocols and testing their behavior when used via satellite networks, many challenges remain that no existing system has fully addressed. With Proto2Testbed, we present an approach for a new testbed system that relies on isolated virtual machines. Once a specific testbed is defined, many steps of a typical testbed lifecycle, like testbed setup and experiment coordination, are fully automated. The testbed can be used in multiple ways;one example is the integration of a satellite mega-constellation simulation, thus turning the testbed system into a complete end-to-end emulation environment. Examples are used to demonstrate that Proto2Testbed can be used for various experiments in its current state. The design of future experiments is outlined, which will include a testbed for extensive evaluations of end-to-end security protocols. © 2025 ieee.

关键词： Satellite communication systems

来源：评论

学校读者我要写书评

暂无评论

Careful Resume: design and Analysis with Picoquic over Satellite Paths 12

Careful Resume: Design and Analysis with Picoquic over Satel...

引用

12th Advanced Satellite Multimedia systems Conference and the 18th signal processing for Space Communications workshop, ASMS/SPSC 2025

作者： Hofstatter, Matthias Deutschmann, Jörg Secchi, Raffaello Fairhurst, Gorry German, Reinhard Friedrich-Alexander-Universität Erlangen-Nürnberg Computer Networks and Communication Systems Germany University of Aberdeen Department of Engineering United Kingdom

ISBN: (纸本)9798331522353

Slow Start increases the congestion window by doubling each round trip until congestion is detected. As a result, reaching optimal speed typically takes several round trip times, especially important in high bandwidth-delay product networks. Geostationary satellite communications now use Performance Enhancing Proxies to accelerate the growth of the congestion window. However, these are ineffective for connections with encrypted headers or UDP traffic. We propose a new method, Careful Resume, that enables a rapid ramp-up of congestion control by reusing previous parameters. We implement Careful Resume in Picoquic and run performance tests using an emulated geostationary satellite path, three real geostationary satellite networks, the low Earth orbit satellite megaconstellation Starlink, and a cellular 5G network. Results confirm that Careful Resume accelerates the ramp-up process, reducing total transmission time. Even for connections with lower bandwidth-delay products, the network congestion point can be reached much more quickly. Benefits are particularly pronounced for paths with high bandwidth-delay products and medium-sized transfers such as web traffic. © 2025 ieee.

关键词： Geostationary satellites

来源：评论

学校读者我要写书评

暂无评论

A Homogeneous FeFET-Based Time-Domain Compute-in-Memory Fabric for Matrix-Vector Multiplication and Associative Search

引用

ieee TRANSACTIONS ON COMPUTER-AIDED design OF INTEGRATED CIRCUITS AND systems 2025年第5期44卷 1856-1868页

作者： Yin, Xunzhao Huang, Qingrong Barkam, Hamza Errahmouni Mueller, Franz Deng, Shan Vardar, Alptekin De, Sourav Jiang, Zhouhang Imani, Mohsen Schlichtmann, Ulf Hu, Xiaobo Sharon Zhuo, Cheng Kaempfe, Thomas Ni, Kai Zhejiang Univ Coll Informat Sci & Elect Engn Hangzhou 310058 Peoples R China Univ Calif Irvine Dept Comp Sci Irvine CA 92697 USA Fraunhofer IPMS Ctr Nanoelect Technol Ctr Nanoelect Technol D-01099 Dresden Germany Rochester Inst Technol Dept Elect & Microelect Engn Rochester NY 14623 USA Natl Tsinghua Univ Coll Semicond Res Hsinchu 300 Taiwan Tech Univ Munich Chair Elect Design Automat D-80333 Munich Germany Univ Notre Dame Dept Comp Sci & Engn Notre Dame IN 46556 USA Fraunhofer IPMS Ctr Nanoelect Technol D-01099 Dresden Germany Tech Univ Carolo Wilhelmina Braunschweig D-38106 Braunschweig Germany Univ Notre Dame Dept Elect Engn Notre Dame IN 46556 USA

Matrix-vector multiplication (MVM) and content-based search are two key operations in many machine learning workloads. This article proposes a ferroelectric FET (FeFET) time-domain compute-in-memory (TD-CiM) array that can accelerate both operations in a homogeneous fabric. We demonstrate that 1) the AND and XOR/XNOR logic functions required by MVM and content-based search can be realized using a single compute-in-memory (CiM) cell composed of 2FeFETs connected in series;2) an inverter chain-based TD-CiM array along with a two-phase time-domain computation principle of the TD-CiM can be employed to implement the MVM and content-based search functions;3) a signal delay-to-digital output conversion can be implemented by associating a loading capacitor with each stage of the inverter chain-based TD-CiM array, ensuring the full digital compatibility;and 4) the proposed 2FeFET cell and inverter chain-based TD-CiM array are robust against FeFET variation according to our comprehensive theoretical and experimental validation. We show how the FeFET TD-CiM can be exploited to accelerate hyperdimensional computing (HDC) and adjusted to process different tasks through dynamic and fine-grained resource allocation. HDC application benchmarking results show that the proposed FeFET-based TD-CiM offers on average 106x/63x energy reduction/speedup compared to GPU-based implementation. With more than 8500 TOPS/W energy-efficiency, the proposed FeFET-based TD-CiM exhibits huge potential as a processing fabric for various memory-intensive applications.

关键词： FeFETs Delays Cams Time-domain analysis Energy efficiency Logic Inverters Fabrics Array signal processing In-memory computing Content addressable memory ferroelectric FET (FeFET) time-domain compute-in-memory (TD-CiM)

来源：评论

学校读者我要写书评

暂无评论

Physical Layer simulative comparison of DVB-S2X/RCS2 and 3GPP 5G NR-NTN technologies over Geostationary Satellite Scenario 12

Physical Layer simulative comparison of DVB-S2X/RCS2 and 3GP...

引用

12th Advanced Satellite Multimedia systems Conference and the 18th signal processing for Space Communications workshop, ASMS/SPSC 2025

作者： Chamaillard, Baptiste Traoré, Albekaye Borios, Nathan Cioni, Stefano Thales Alenia Space Business Line Telecommunication Toulouse France European Space Agency Telecommunication Systems and Techniques Section Noordwijk Netherlands

ISBN: (纸本)9798331522353

This simulation study aims to compare the physical layer performance of the 5th Generation (5G) New Radio Non-Terrestrial Networks (NR NTN) air interface with Digital Video Broadcasting (DVB) technologies, specifically analyzing the Second Generation Satellite Extensions (S2X) standard on the Downlink (DL) and DVB- Return Channel via Satellite 2nd generation (RCS2) standard on the Uplink (UL). The study assumes a reference geosynchronous satellite telecommunication system operating in the Ka-band frequencies. The comparison analysis of the physical layers demodulation performance on the Forward (FWD) link reveals an average spectral efficiency decrease from 15 to 26% for NR PDSCH (Physical Downlink Shared Channel) in comparison to DVB-S2X. The analysis of the Return (RTN) link indicates comparable performance between NR PUSCH (Physical Uplink Shared Channel) and DVB-RCS2, with a marginal advantage for either technology based on specific study cases. The conclusions drawn from the performance comparison emphasize the potential for optimizing NR waveform configuration to improve spectral efficiency and reduce implementation losses through enhanced channel estimation and phase tracking algorithms. Moreover, this study outcome advocates for the completion of the physical layer comparison with System Level simulations of both technologies. This would make it possible to consider additional implications such as nonlinear amplification effects, control plane overhead, and scheduling efficiency. © 2025 ieee.

关键词： Satellite communication systems

来源：评论

学校读者我要写书评

暂无评论

Satellite-Terrestrial Integration: 5G Architectures for the Seamless Support of Mission Critical Services 12

Satellite-Terrestrial Integration: 5G Architectures for the ...

引用

12th Advanced Satellite Multimedia systems Conference and the 18th signal processing for Space Communications workshop, ASMS/SPSC 2025

作者： Nasirian, Sara Giambene, Giovanni Barrachina-Muñoz, Sergio Mangues-Bafalluy, Josep Hadji, Makhlouf Vazquez, Miguel Ángel Santilli, Lorenzo Foukalas, Fotis Khalili, Hamzeh Università di Siena Department of Information Engineering and Mathematics Italy Centre Tecnològic de Telecomunicacions de Catalunya Castelldefels Spain Airbus Defense and Space Paris France Telecom Italia S.p.A The Innovation and Information Office Italy University of Thessaly Dept. of Informatics & Telecommunications Lamia Greece

ISBN: (纸本)9798331522353

This paper studies integration issues for the achievement of TN-NTN systems providing mission-critical (MCX) services in the EU 5G-GOVSATCOM project. The standardization of NTN as an integral part of 5G terrestrial systems is progressing, with important progress made in the last Releases 17 and 18. This important evolution, however, is not complete because the integration of the two networks is also needed at the protocol level. In the first part of this paper, we investigate MCX requirements. Then, two alternative architectures are considered with distinct core networks or with unified core networks, according to Release 20. The second part of this paper presents the issue of the seamless Vertical Handover between TN and NTN, proposing the adoption of a smart gateway server, a new block of the 5G system to manage a seamless switch from the two networks when some critical conditions are met. Using VPNs from UE to TN and TNT can facilitate the VHO procedure at the network layer, just avoiding a change of the IP address of the UE during the VHO that would cause a drop for the MCX end-to-end service. We believe this paper can provide useful insights into GOVSATCOM system design and the experimental phase of this project. © 2025 ieee.

关键词： 5G mobile communication systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：