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Antenna Pattern Design in Frequency Selective Channels

IEEE Wireless Communications Letters 2025年

作者： Zhang, Cuicui Wang, Shuo Chen, Xin Zhang, Ming Wang, Kewei Zheng, Tong-Xing Zhang, Anxue Xi’an Jiaotong University School of Information and Communications Engineering Shanxi Xi’an710049 China Autonavi Software Co. Ltd Beijing100102 China Purple Mountain Laboratories Nanjing211111 China National Key Laboratory of Multi-domain Data Collaborative Processing and Control Xi’an710068 China

Antenna configuration plays a critical role in improving channel capacity through optimized antenna spacing, radiation patterns, and coupling. While previous works have explored antenna pattern design for flat fading channels, the optimization of patterns for frequency selective channels, remains under-explored. This paper addresses the antenna pattern design aimed at maximizing capacity in frequency selective channels. We propose a novel discrete representation model for antenna patterns. Based on that, the capacity maximization problem is formulated and solved using a combination of alternating optimization, convex optimization, auxiliary variable method, and the bisection method to achieve antenna pattern design. Numerical simulations validate the effectiveness of the proposed approach, demonstrating significant improvements in system capacity. © 2012 IEEE.

关键词： Directional patterns (antenna)

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A Survey on Network Management for xANET: Evolution, Challenges, Future Directions

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IEEE Communications Surveys and Tutorials 2025年

作者： Li, Tong Yang, Chungang Wang, Yao Cai, Lin Anpalagan, Alagan Han, Zhu Xidian University State Key Laboratory of Integrated Services Networks Xi'an710071 China National Key Laboratory of Multi-domain Data Collaborative Processing and Control Xi'an710068 China Hangzhou Institute of Technology of Xidian University Hangzhou311231 China University of Victoria Department of Electrical and Computer Engineering VictoriaBCV8P 5C2 Canada Ryerson University Department of Electrical and Computer Engineering TorontoONM5B 2K3 Canada University of Houston Department of Electrical and Computer Engineering HoustonTX77004 United States Kyung Hee University Department of Computer Science and Engineering Seoul446701 Korea Republic of

The x ad hoc network (xANET) termed as a family of ad hoc networks, including mobile ad hoc network (MANET), vehicular ad hoc network (VANET), flying ad hoc network (FANET) and satellite ad hoc network (SANET), has found a wide range of applications in providing ubiquitous wireless services. Despite its broad utility, the dynamic nature and lack of a centralized controller pose significant challenges to effective and flexible network management for xANET. Conventional network management protocols face challenges such as scalability, security vulnerabilities, configuration complexity, robustness, and performance resilience. Recent efforts have presented different approaches, focusing on policy-based network management (PBNM) and intent-driven network management (IDNM). However, there is no comprehensive survey to clarify their concepts and classifications. This paper presents a survey of the network management evolution for xANET, covering configuration-based, policy-based and the latest intent-driven approaches. We first introduce the characteristics and applications of xANET. Meanwhile, we investigate the network management concepts and challenges. Moreover, we survey the evolution of management protocols for xANET, including simple network management protocol (SNMP), PBNM, and IDNM. Then, we follow the detailed network management of xANET from configuration-based to policy-based and intent-driven approaches. Through comparative analysis, it is found that IDNM employs a more intelligent management protocol, demonstrating higher efficiency and flexibility in handling complex tasks and dynamic network management. This makes it better suited to addressing the challenges of xANET management. Finally, we summarize the remaining challenges and possible future research directions. © 2025 IEEE.

关键词： Vehicular ad hoc networks

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A Phase Noise Immune Equalization Algorithm for Millimeter Wave SC-FDE System 12

A Phase Noise Immune Equalization Algorithm for Millimeter W...

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12th IEEE International Conference on Computer Science and Network Technology, ICCSNT 2024

作者： Wang, Yu Xu, Yuanyuan 20th Institute National Key Laboratory of Multi-Domain Data Collaborative Processing and Control Xi'an China

ISBN: (纸本)9798350350791

To solve the problem that phase noise affection of high-order modulation in millimeter wave broadband system, this paper analyzes and modifies the theoretical model of phase noise provided in the 802.11ad and 802.15.3c standards, and generates the actual noise values based on the modified model for simulation analysis. The frame structure given in standards is optimized for SC-FDE system to estimate noise and channel state by adding data block 0. An improved MMSE equalization algorithm is proposed in this paper to track the channel and phase noise changes in real time and obvious phase noise immunity characteristic is obtained compared with traditional algorithm. © 2024 IEEE.

关键词： Phase noise

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A Phase Noise Immune Equalization Algorithm For Millimeter Wave SC-FDE System

A Phase Noise Immune Equalization Algorithm For Millimeter W...

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International Conference on Computer Science and Network Technology (ICCSNT)

作者： Yu Wang Yuanyuan Xu National Key Laboratory of Multi-Domain Data Collaborative Processing and Control China Electronics Technology Group Corporation (CETC) 20th Institute Xi’an China

ISBN: (数字)9798350350791

ISBN: (纸本)9798350350807

关键词： Phase noise IEEE 802.15 Standard Computer science Analytical models Phase modulation Millimeter wave technology Channel estimation Real-time systems Broadband communication Standards

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On efficient and robust metrics for RANSAC hypotheses and 3D rigid registration

arXiv

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arXiv 2020年

作者： Yang, Jiaqi Huang, Zhiqiang Quan, Siwen Zhang, Qian Zhang, Yanning Cao, Zhiguo National Engineering Laboratory for Integrated Aero-Space-Ground-Ocean Big Data Application Technology School of Computer Science Northwestern Polytechnical University China School of Software Northwestern Polytechnical University Xi’an710129 China School of Electronic and Control Engineering Chang’an University Xi’an710064 China School of Resources and Environment Hubei University Wuhan430062 China National Key Laboratory of Science and Technology on Multi-spectral Information Processing School of Artificial Intelligence and Automation Huazhong University of Science and Technology Wuhan430074 China

This paper focuses on developing efficient and robust evaluation metrics for RANSAC hypotheses to achieve accurate 3D rigid registration. Estimating six-degree-of-freedom (6-DoF) pose from feature correspondences remains a popular approach to 3D rigid registration, where random sample consensus (RANSAC) is a de-facto choice to this problem. However, existing metrics for RANSAC hypotheses are either time-consuming or sensitive to common nuisances, parameter variations, and different application scenarios, resulting in performance deterioration in overall registration accuracy and speed. We alleviate this problem by first analyzing the contributions of inliers and outliers, and then proposing several efficient and robust metrics with different designing motivations for RANSAC hypotheses. Comparative experiments on four standard datasets with different nuisances and application scenarios verify that the proposed metrics can significantly improve the registration performance and are more robust than several state-of-the-art competitors, making them good gifts to practical applications. This work also draws an interesting conclusion, i.e., not all inliers are equal while all outliers should be equal, which may shed new light on this research problem. Copyright © 2020, The Authors. All rights reserved.

关键词： Deterioration

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