IEEE Communications Letters最新文献_第2页

Efficient Codebook Design and User Scheduling for Large STAR-RIS-Aided Downlink URLLC Transmission 大型star - ris辅助下行URLLC传输的高效码本设计与用户调度

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-12-02 DOI: 10.1109/LCOMM.2024.3510464

Mostafa Darabi;Ata Khalili;Lutz Lampe;Robert Schober

引用次数: 0

User Localization for Reconfigurable Intelligent Surface-Assisted mmWave MIMO-OFDM Systems 可重构智能表面辅助毫米波MIMO-OFDM系统的用户定位

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-12-02 DOI: 10.1109/LCOMM.2024.3509621

Menglei Sheng;Youming Li;Wanyuan Cai;Qinke Qi;Zhenqian Wu;Yonghong Wu

引用次数: 0

Optimal Quantized Multi-Cell MMSE Precoding With Low Resolution Data Converters 基于低分辨率数据转换器的最佳量化多单元MMSE预编码

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-12-02 DOI: 10.1109/LCOMM.2024.3509916

Qurrat-Ul-Ain Nadeem;Anas Chaaban;Mérouane Debbah

{"title":"Optimal Quantized Multi-Cell MMSE Precoding With Low Resolution Data Converters","authors":"Qurrat-Ul-Ain Nadeem;Anas Chaaban;Mérouane Debbah","doi":"10.1109/LCOMM.2024.3509916","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3509916","url":null,"abstract":"This work considers a multi-cell multi-user multiple-input multiple-output (MIMO) system that employs low resolution analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) at each base station (BS) to limit the power consumption. Existing precoder designs for quantization-free systems are sub-optimal for such quantized systems, while the existing precoder designs for quantized systems consider single-cell settings and perfect channel state information (CSI). To address these gaps, we study the downlink linear precoder optimization problem in a cellular system under the distortions introduced by low resolution DACs based on a minimum mean square error (MMSE) approach, while accounting for imperfect CSI obtained in the uplink under distortions introduced by low resolution ADCs. The problem is analytically solved resulting in an optimal quantized multi-cell MMSE precoder that reduces both intra-cell and inter-cell interference under quantization errors, and yields better bit error rate performance than applying the existing conventional multi-cell and quantized single-cell linear precoders to a quantized multi-cell massive MIMO system.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 1","pages":"195-199"},"PeriodicalIF":3.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Adaptive Jamming Decision-Making Against FHSS Communications via Inexpert Demonstrations Assisted Meta Reinforcement Learning 基于非专家演示辅助元强化学习的FHSS通信自适应干扰决策

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-29 DOI: 10.1109/LCOMM.2024.3502423

Ning Rao;Hua Xu;Zisen Qi;Dan Wang;Xiang Peng;Lei Jiang

{"title":"Adaptive Jamming Decision-Making Against FHSS Communications via Inexpert Demonstrations Assisted Meta Reinforcement Learning","authors":"Ning Rao;Hua Xu;Zisen Qi;Dan Wang;Xiang Peng;Lei Jiang","doi":"10.1109/LCOMM.2024.3502423","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3502423","url":null,"abstract":"Reinforcement learning (RL)’s powerful optimization capabilities have been extensively applied in the field of wireless communication jamming decision-making. However, the generalization of jamming policies has rarely been explored, and most existing studies rely on task-customized reward functions, which are often intractable to design. To address these issues, we propose a meta RL method for frequency-hopping spread spectrum (FHSS) jamming decision-making, aided by inexpert demonstrations. Firstly, the policy network is meta-trained with multiple diverse tasks to obtain initial network parameters with good generalization. Subsequently, we combine RL and behavioral cloning (BC) to extract useful information from demonstrations, along with learning rate adaptation to achieve efficient policy exploration without the task-customized jamming reward. Simulations confirm that our proposed method not only adapts to unseen jamming tasks with just a few fine-tuning steps under general binary rewards condition, but also achieves higher accumulated jamming rewards and results in lower normalized throughput for users, outperforming state-of-the-art methods.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 1","pages":"105-109"},"PeriodicalIF":3.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142940708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Rotatable Block-Controlled RIS: Bridging the Performance Gap to Element-Controlled Systems 可旋转块控制RIS：弥合与元件控制系统的性能差距

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-29 DOI: 10.1109/LCOMM.2024.3508848

Weicong Chen;Xinyi Yang;Chao-Kai Wen;Wankai Tang;Jinghe Wang;Yifei Yuan;Xiao Li;Shi Jin

{"title":"Rotatable Block-Controlled RIS: Bridging the Performance Gap to Element-Controlled Systems","authors":"Weicong Chen;Xinyi Yang;Chao-Kai Wen;Wankai Tang;Jinghe Wang;Yifei Yuan;Xiao Li;Shi Jin","doi":"10.1109/LCOMM.2024.3508848","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3508848","url":null,"abstract":"The passive reconfigurable intelligent surface (RIS) requires numerous elements to achieve adequate array gain, which linearly increases power consumption (PC) with the number of reflection phases. To address this PC problem, this letter introduces a rotatable block-controlled RIS (BC-RIS) that preserves spectral efficiency (SE) while reducing power costs. Unlike the element-controlled RIS (EC-RIS), which necessitates independent phase control for each element, the BC-RIS uses a single phase control circuit for each block, substantially lowering power requirements. In the maximum ratio transmission, utilizing statistical channel state information (CSI) to rotate blocks and coherently superimpose signals with optimized reflection phase of blocks, the BC-RIS achieves the same averaged SE as the EC-RIS. Rotating RIS blocks with the statistical CSI allows for slow mechanical rotation speeds. To counteract the added power demands from rotation, influenced by block size, we have developed a segmentation scheme to minimize overall PC. Furthermore, constraints for rotation power-related parameters have been established to enhance the energy efficiency of the BC-RIS compared to the EC-RIS. Numerical results confirm that this approach significantly improves energy efficiency while maintaining performance.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 1","pages":"185-189"},"PeriodicalIF":3.7,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Hierarchical Functionality Prioritization in Multicast ISAC: Optimal Admission Control and Discrete-Phase Beamforming 多播ISAC中的分层功能优先级：最优接纳控制和离散相位波束形成

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-26 DOI: 10.1109/LCOMM.2024.3506696

Luis F. Abanto-Leon;Setareh Maghsudi

引用次数: 0

Resource-Aware Personalized Federated Learning Based on Reinforcement Learning 基于强化学习的资源感知个性化联邦学习

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-25 DOI: 10.1109/LCOMM.2024.3506015

Tingting Wu;Xiao Li;Pengpei Gao;Wei Yu;Lun Xin;Manxue Guo

引用次数: 0

STAR-RIS-Assisted Multicast Communications in DFRC-UAV-Enabled ISAC Systems 星- ris辅助多播通信在dfrc - uav支持的ISAC系统中

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-25 DOI: 10.1109/LCOMM.2024.3505896

Longshen Chen;Jia Zhu;Yulong Zou;Yulei Lou;Yizhi Li

{"title":"STAR-RIS-Assisted Multicast Communications in DFRC-UAV-Enabled ISAC Systems","authors":"Longshen Chen;Jia Zhu;Yulong Zou;Yulei Lou;Yizhi Li","doi":"10.1109/LCOMM.2024.3505896","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3505896","url":null,"abstract":"In this letter, we study a dual-function radar-communication unmanned aerial vehicle (DFRC-UAV)- enabled integrated sensing and communications (ISAC) system, and propose a simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) assisted DFRC-UAV-enabled ISAC scheme called SRaDUI, where a DFRC-UAV simultaneously senses ground targets and multicasts information to users assisted by a STAR-RIS. To improve the multicast capacity, we formulate an achievable rate maximization problem by jointly designing the scheduling of targets, the covariance matrices of the transmitted symbol vectors, the STAR-RIS coefficients, and the DFRC-UAV trajectory. To address this non-convex problem, we propose an alternating optimization (AO) based iterative algorithm, decomposing the original problem into a series of subproblems, which can be solved alternately to obtain suboptimal solutions based on the semidefinite relaxation (SDR) and successive convex approximation (SCA). Numerical results demonstrate the superiority of the proposed SRaDUI scheme and the effectiveness of the designed iterative algorithm.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 1","pages":"170-174"},"PeriodicalIF":3.7,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142938384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

RIS-Aided Dual-Polarized MIMO: How Large a Surface Is Needed to Beat Single Polarization? ris辅助双极化MIMO：需要多大的表面才能战胜单极化？

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-22 DOI: 10.1109/LCOMM.2024.3504725

Zizhou Zheng;Huan Huang;Hongliang Zhang;A. Lee Swindlehurst

引用次数: 0

Weighted Sum Power Minimization for Cooperative Spectrum Sharing in Cognitive Radio Networks 认知无线电网络中协同频谱共享的加权和功率最小化算法

IF 3.7 3区计算机科学

IEEE Communications Letters Pub Date : 2024-11-22 DOI: 10.1109/LCOMM.2024.3504957

Yang Yu;Xiaoqing Tang

引用次数: 0