IEEE Transactions on Wireless Communications最新文献

Integrated Sensing and Channel Estimation by Exploiting Dual Timescales for Delay-Doppler Alignment Modulation 利用延迟-多普勒对齐调制的双时标进行综合传感和信道估计

IF 10.4 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-14 DOI: 10.1109/twc.2024.3493255

Zhiqiang Xiao, Yong Zeng, Fuxi Wen, Zaichen Zhang, Derrick Wing Kwan Ng

引用次数: 0

Resource Allocation and Slicing Strategy for Multiple Services Co-Existence in Wireless Train Communication Network 无线列车通信网络中多种服务共存的资源分配和分片策略

IF 10.4 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-14 DOI: 10.1109/twc.2024.3493240

Qiao Ren, Siyu Lin, Yifei Cai, Xiaoheng Deng, Linghe Kong, Shahid Mumtaz, Bo Ai

引用次数: 0

Dependency-Aware Joint Task Offloading and Resource Allocation in Heterogeneous Mobile Edge Computing 异构移动边缘计算中的依赖性感知联合任务卸载和资源分配

IF 10.4 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-14 DOI: 10.1109/twc.2024.3483658

Guo Zhang, Baoxian Zhang, Shuo Peng, Chen Liu, Cheng Li

引用次数: 0

Bias-Reduced Closed-Form Method for 3-D Moving Object Localization by AOA Using Sensors at Known and Unknown Positions 利用已知和未知位置的传感器，通过 AOA 进行三维移动物体定位的减偏差闭模方法

IF 10.4 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-14 DOI: 10.1109/twc.2024.3485085

Sipu Zhou, Gang Wang, K. C. Ho

引用次数: 0

IEEE Transactions on Wireless Communications Society Information 电气和电子工程师学会《无线通信学会期刊》信息

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-12 DOI: 10.1109/TWC.2024.3480733

引用次数: 0

IEEE Transactions on Wireless Communications Publication Information 电气和电子工程师学会《无线通信论文集》出版信息

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-11-12 DOI: 10.1109/TWC.2024.3480731

引用次数: 0

When to Simply Use Passive RIS as Beamformer: An Information-Theoretic Analysis and a Novel Single-RF MIMO Transceiver Architecture 何时使用无源 RIS 作为波束形成器？信息理论分析和新型单射频多输入多输出收发器架构

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-10-04 DOI: 10.1109/TWC.2024.3451531

Ru-Han Chen;Jing Zhou;Yonggang Zhu;Kai Zhang

{"title":"When to Simply Use Passive RIS as Beamformer: An Information-Theoretic Analysis and a Novel Single-RF MIMO Transceiver Architecture","authors":"Ru-Han Chen;Jing Zhou;Yonggang Zhu;Kai Zhang","doi":"10.1109/TWC.2024.3451531","DOIUrl":"10.1109/TWC.2024.3451531","url":null,"abstract":"In this paper, for a single-input multiple-output (SIMO) system aided by a passive reconfigurable intelligent surface (RIS), the joint transmission accomplished by the single transmit antenna and the RIS with multiple controllable reflective elements is considered. Relying on a general capacity upper bound derived by using a maximum-trace argument, we respectively characterize the capacity slope of low-signal-to-noise-ratio channels and the exact capacity of rank-one channels, in which the optimal configuration of the RIS is proved to be beamforming-only with carefully-chosen phase shifts. To exploit the potential of modulating extra information on the RIS, by leveraging a strategy named partially beamforming and partially information-carrying based on QR decomposition and successive interference cancellation, we propose a novel transceiver architecture with only a single RF front end at the transmitter, by which the considered channel can be regarded as a concatenation of a vector Gaussian channel and several phase-modulated channels. Especially, we investigate a class of vector Gaussian channels with a hypersphere input support constraint, and not only generalize the existing result to arbitrary-dimensional real spaces but also present its high-order capacity asymptotics, by which both capacities of hypersphere-constrained channels and achievable rates of the proposed transceiver with two different signaling schemes can be well-approximated. Information-theoretic analyses show that the transceiver architecture designed for the SIMO channel has a boosted multiplexing gain, rather than one for the conventionally-used optimized beamforming scheme. Numerical results verify our derived asymptotic results and show notable superiority of the proposed transceiver as compared with the beamforming and the receive spatial modulation schemes.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"17157-17173"},"PeriodicalIF":8.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10705935","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-Timescale Synchronization and Migration for Digital Twin Networks: A Multi-Agent Deep Reinforcement Learning Approach 数字孪生网络的双时标同步和迁移：多代理深度强化学习方法

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-09-13 DOI: 10.1109/TWC.2024.3452689

Wenshuai Liu;Yaru Fu;Yongna Guo;Fu Lee Wang;Wen Sun;Yan Zhang

{"title":"Two-Timescale Synchronization and Migration for Digital Twin Networks: A Multi-Agent Deep Reinforcement Learning Approach","authors":"Wenshuai Liu;Yaru Fu;Yongna Guo;Fu Lee Wang;Wen Sun;Yan Zhang","doi":"10.1109/TWC.2024.3452689","DOIUrl":"10.1109/TWC.2024.3452689","url":null,"abstract":"Digital twins (DTs) have emerged as a promising enabler for representing the real-time states of physical worlds and realizing self-sustaining systems. In practice, DTs of physical devices, such as mobile users (MUs), are commonly deployed in multi-access edge computing (MEC) networks for the sake of reducing latency. To ensure the accuracy and fidelity of DTs, it is essential for MUs to regularly synchronize their status with their DTs. However, MU mobility introduces significant challenges to DT synchronization. Firstly, MU mobility triggers DT migration which could cause synchronization failures. Secondly, MUs require frequent synchronization with their DTs to ensure DT fidelity. Nonetheless, DT migration among MEC servers, caused by MU mobility, may occur infrequently. Accordingly, we propose a two-timescale DT synchronization and migration framework with reliability consideration by establishing a non-convex stochastic problem to minimize the long-term average energy consumption of MUs. We use Lyapunov theory to convert the reliability constraints and reformulate the new problem as a partially observable Markov decision-making process (POMDP). Furthermore, we develop a heterogeneous agent proximal policy optimization with Beta distribution (Beta-HAPPO) method to solve it. Numerical results show that our proposed Beta-HAPPO method achieves significant improvements in energy savings when compared with other benchmarks.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"17294-17309"},"PeriodicalIF":8.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Convergence Analysis and Energy Minimization for Reconfigurable Intelligent Surface-Assisted Federated Learning 可重构智能表面辅助联合学习的收敛分析和能量最小化

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-09-13 DOI: 10.1109/TWC.2024.3453398

Siyu Zhang;Zheng Yang;Gaojie Chen;Zhicheng Dong;Zhu Han

{"title":"Convergence Analysis and Energy Minimization for Reconfigurable Intelligent Surface-Assisted Federated Learning","authors":"Siyu Zhang;Zheng Yang;Gaojie Chen;Zhicheng Dong;Zhu Han","doi":"10.1109/TWC.2024.3453398","DOIUrl":"10.1109/TWC.2024.3453398","url":null,"abstract":"This paper considers reconfigurable intelligent surface (RIS)-enabled federated learning (FL) system, where the FL users communicate with the access point (AP) via RIS. To reveal the impact of RIS and learning rate on FL aggregation, the theoretical result of minimum global communication rounds and local iteration rounds are derived. Based on the obtained convergence results of FL, we formulate an optimization problem to minimize the energy consumption of the proposed RIS-assisted FL system by jointly optimizing the passive beamforming of RIS, the CPU computing frequency, the bandwidth, and the transmit power of users. To solve the non-convex problem, we propose a block coordinate descent (BCD) optimization algorithm based on successive convex approximation (SCA) to decompose the original problem into four sub-problems. Specifically, the closed-form solutions are derived for the CPU frequency, RIS reflection matrix, and communication bandwidth. For the transmit power sub-problem, we propose a linear approximation algorithm based on the first-order Taylor expansion to ensure solution accuracy. Finally, simulation results show that: 1) the energy consumption of the proposed RIS-assisted FL system can be greatly reduced compared to that without optimizing the passive beamforming of RIS and the transmit power; 2) The learning performance of the proposed RIS-enabled FL system is closed to the FL without wireless communication interference; and 3) The proposed algorithm can not only significantly reduce energy consumption, but also fast convergence in terms of the FL model training and testing.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"17384-17398"},"PeriodicalIF":8.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance Trade-Off of Integrated Sensing and Communications for Multi-User Backscatter Systems 多用户后向散射系统的综合传感与通信性能权衡

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-09-13 DOI: 10.1109/TWC.2024.3452786

Yuanming Tian;Dan Wang;Chuan Huang;Wei Zhang

{"title":"Performance Trade-Off of Integrated Sensing and Communications for Multi-User Backscatter Systems","authors":"Yuanming Tian;Dan Wang;Chuan Huang;Wei Zhang","doi":"10.1109/TWC.2024.3452786","DOIUrl":"10.1109/TWC.2024.3452786","url":null,"abstract":"This paper studies the performance trade-off in a multi-user backscatter communication (BackCom) system for integrated sensing and communications (ISAC), where the multi-antenna ISAC transmitter sends excitation signals to power multiple single-antenna passive backscatter devices (BD), and the multi-antenna ISAC receiver performs joint sensing (localization) and communication tasks based on the backscattered signals from all BDs. Specifically, the localization performance is measured by the Cramér-Rao bound (CRB) on the transmission delay and direction of arrival (DoA) of the backscattered signals, whose closed-form expression is obtained by deriving the corresponding Fisher information matrix (FIM), and the communication performance is characterized by the sum transmission rate of all BDs. Then, to characterize the trade-off between the localization and communication performances, the CRB minimization problem with the communication rate constraint is formulated, and is shown to be non-convex in general. By exploiting the hidden convexity, we propose an approach that combines fractional programming (FP) and Schur complement techniques to transform the original problem into an equivalent convex form. Finally, numerical results reveal the trade-off between the CRB and sum transmission rate achieved by our proposed method.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"17310-17323"},"PeriodicalIF":8.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142231240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0