IEEE Communications Letters最新文献_第10页

Distortion-Aware Hybrid Beamforming for Integrated Sensing and Communication 集成传感与通信的畸变感知混合波束形成

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2025-12-29 DOI: 10.1109/LCOMM.2025.3649126

Zeyuan Zhang;Yue Xiu;Phee Lep Yeoh;Guangyi Liu;Zixing Wu;Ning Wei

引用次数: 0

Performance Analysis on Hybrid NOMA Under Varying Channel Conditions 变信道条件下混合NOMA的性能分析

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-06-09 DOI: 10.1109/LCOMM.2026.3702014

Chenzhan Xu;Yanshi Sun;Ximing Xie;Fang Fang

引用次数: 0

Computationally Efficient DOA Estimation for Beamforming in Moving Coprime Array Systems 移动协素数阵列系统波束形成的高效DOA估计

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-27 DOI: 10.1109/LCOMM.2026.3717088

Rohini Dakulagi;Ravi Raushan

{"title":"Computationally Efficient DOA Estimation for Beamforming in Moving Coprime Array Systems","authors":"Rohini Dakulagi;Ravi Raushan","doi":"10.1109/LCOMM.2026.3717088","DOIUrl":"https://doi.org/10.1109/LCOMM.2026.3717088","url":null,"abstract":"This letter addresses direction-of-arrival (DOA) estimation for coherent sources in moving coprime array (MCA) systems, with emphasis on beamforming for wireless communications. Due to array motion, the resulting virtual coarray is inherently incomplete, limiting the effectiveness of conventional interpolation- and reconstruction-based approaches, which incur high computational complexity and reduced robustness. To overcome these limitations, a computationally efficient sparse Bayesian learning (SBL) framework is proposed that directly operates on incomplete coarray observations without explicit reconstruction. The DOA estimation problem is formulated as a sparse Bayesian inference task over an overcomplete angular dictionary, enabling implicit recovery of missing virtual array elements via evidence maximization. The proposed approach avoids Toeplitz reconstruction, convex optimization, and spatial smoothing, while achieving high-resolution estimation. Simulation results demonstrate improved accuracy and robustness, particularly at low signal-to-noise ratios, while reducing the overall processing complexity by avoiding interpolation, covariance reconstruction, and convex optimization stages.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"30 ","pages":"2735-2739"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148625978","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

An Extended κ–μ Shadowed Fading Model With Cluster Imbalance 一类具有簇不平衡的扩展κ -μ阴影衰落模型

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-22 DOI: 10.1109/LCOMM.2026.3716132

José Vega-Sánchez;Victor Garzón Pacheco;Nathaly Orozco Garzón;Henry Carvajal Mora;Noel Pérez-Pérez;Edgar Benitez Olivo

{"title":"An Extended κ–μ Shadowed Fading Model With Cluster Imbalance","authors":"José Vega-Sánchez;Victor Garzón Pacheco;Nathaly Orozco Garzón;Henry Carvajal Mora;Noel Pérez-Pérez;Edgar Benitez Olivo","doi":"10.1109/LCOMM.2026.3716132","DOIUrl":"https://doi.org/10.1109/LCOMM.2026.3716132","url":null,"abstract":"Most fading models assume balanced in-phase and quadrature components, although real propagation environments may exhibit cluster imbalance due to non-isotropic scattering, dominant directions, or specular paths. This letter proposes the imbalanced <inline-formula> <tex-math>$kappa $ </tex-math></inline-formula>–<inline-formula> <tex-math>$mu $ </tex-math></inline-formula> shadowed (iKMS) fading model, which extends the classical KMS model by introducing a single imbalance parameter <inline-formula> <tex-math>$pin [{0,1}]$ </tex-math></inline-formula>. The proposed model preserves the tractability of KMS while yielding closed-form expressions for the moment generating function (MGF), probability density function (PDF), cumulative distribution function (CDF), and amount of fading (AoF), as well as finite Gamma representations for integer-valued effective parameters. The derived MGF is also used to characterize the average bit error rate (BER) under coherent binary phase shift keying (BPSK). Numerical results show that decreasing <inline-formula> <tex-math>$p$ </tex-math></inline-formula> increases the fading severity and degrades the BER performance. Moreover, fitting results with millimeter-wave measurements show that iKMS provides better agreement than KMS, particularly in the lower-tail region of the empirical CDF, which is relevant for outage and reliability analysis.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"30 ","pages":"2740-2744"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148625979","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

A Hybrid Collaborative Time–Frequency Network for NOMA Spectrum Sensing 一种用于NOMA频谱传感的时频混合协同网络

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-20 DOI: 10.1109/LCOMM.2026.3715317

Yu Jin;Yonghua Wang;Shiguo Peng

引用次数: 0

Resource-Aware Topology Management for ISAC-Enabled TDOA Localization in IoUT Networks IoUT网络中支持isac的TDOA定位的资源感知拓扑管理

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-27 DOI: 10.1109/LCOMM.2026.3717386

Ruhul Amin Khalil

{"title":"Resource-Aware Topology Management for ISAC-Enabled TDOA Localization in IoUT Networks","authors":"Ruhul Amin Khalil","doi":"10.1109/LCOMM.2026.3717386","DOIUrl":"https://doi.org/10.1109/LCOMM.2026.3717386","url":null,"abstract":"Reliable localization in the Internet of Underwater Things (IoUT) is hindered by limited acoustic bandwidth, long propagation delays, multipath, Doppler shifts, and energy-constrained nodes. This letter proposes an integrated sensing and communication (ISAC)-enabled topology management and multi-stage adaptive estimation (ISAC-TM-MAE) framework for time-difference-of-arrival (TDOA) localization in IoUT networks. In the proposed framework, heterogeneous underwater sensors, seabed anchors, autonomous underwater vehicles (AUVs), and surface buoys exploit acoustic ISAC packets for joint communication and localization. The IoUT network is modeled as a graph, in which informative node pairs are selected subject to acoustic bandwidth, computation, energy, and link-reliability constraints. A D-optimal criterion maximizes the Fisher information matrix (FIM) over the underwater region of interest, while the MAE stage refines the source estimate under acoustic noise and channel uncertainty. Numerical results show that the proposed ISAC-TM-MAE improves localization accuracy, resource efficiency, scalability, and robustness compared with centralized, distributed, and benchmark TDOA localization schemes.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"30 ","pages":"2745-2749"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148626111","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

Sum-Rate Maximization in MISO IRS Multiuser System Using Adaptive Linear Precoding Technique 基于自适应线性预编码技术的MISO IRS多用户系统和速率最大化

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-15 DOI: 10.1109/LCOMM.2026.3713668

Aditya Kumar;Meenakshi Rawat

引用次数: 0

Sphere Manifold Optimization Empowered Joint Antenna Selection and Precoding for XL-MIMO Systems 基于球流形优化的XL-MIMO系统联合天线选择与预编码

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-31 DOI: 10.1109/LCOMM.2026.3718624

Yunchao Song;Chengcheng Wu;Dan Ge;Wanyue Zhang;Chen Liu

{"title":"Sphere Manifold Optimization Empowered Joint Antenna Selection and Precoding for XL-MIMO Systems","authors":"Yunchao Song;Chengcheng Wu;Dan Ge;Wanyue Zhang;Chen Liu","doi":"10.1109/LCOMM.2026.3718624","DOIUrl":"https://doi.org/10.1109/LCOMM.2026.3718624","url":null,"abstract":"This letter investigates the joint optimization of antenna selection and precoding design in extremely large-scale MIMO systems. Unlike previous works, we transform the joint antenna selection and precoding optimization problem into a single-variable optimization problem over the sphere manifold to significantly facilitate solution designs, while a manifold optimization-based algorithm is proposed to enhance solution accuracy, thereby improving overall system performance. Specifically, the joint antenna selection and precoding optimization problem is transformed into an <inline-formula> <tex-math>$ell _{2,0}$ </tex-math></inline-formula>-norm constrained problem over the sphere manifold. To address this nonconvex constraint, an alternating direction method of multipliers-based manifold optimization (ADMM-MO) algorithm is proposed to decompose the primary problem into two subproblems. The manifold subproblem is solved through the Riemannian conjugate gradient descent method, while the <inline-formula> <tex-math>$ell _{2,0}$ </tex-math></inline-formula>-norm constraint is handled via a hard thresholding operator. Furthermore, the proposed ADMM-MO algorithm is theoretically demonstrated to achieve global convergence. Simulation results show that our algorithm significantly outperforms the benchmark.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"30 ","pages":"2775-2779"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148748006","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

Congestion-Aware Channel Selection for ETSI ITS-G5 ETSI ITS-G5的拥塞感知信道选择

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-07-27 DOI: 10.1109/LCOMM.2026.3717388

Oscar Amador;Manuel Urueña;Maria Calderon;Ignacio Soto

{"title":"Congestion-Aware Channel Selection for ETSI ITS-G5","authors":"Oscar Amador;Manuel Urueña;Maria Calderon;Ignacio Soto","doi":"10.1109/LCOMM.2026.3717388","DOIUrl":"https://doi.org/10.1109/LCOMM.2026.3717388","url":null,"abstract":"Access Layer Instance (ALI) selection is essential for ensuring reliable performance in vehicular networks under multi-channel operation. Standardized mechanisms rely on limits to decide whether an ALI can handle traffic coming from a service with a set of requirements. These limits may refer to, e.g., channel utilization, data rate or transmit power. Following a policy, a node selects one of the available ALIs to send traffic through it. This selection can be performed based on using all suitable available ALIs equally (i.e., load balancing) or by turning them on in a sequence of prioritized ALIs that are to be filled sequentially. This letter introduces two congestion-aware mechanisms for ALI selection that consider not only channel occupancy, which is measured through the interval between transmissions allowed by Decentralized Congestion Control (DCC), but also local queue conditions. These measurements are reflected in a metric based on the waiting time before a message can get access to the medium, enabling more accurate and responsive ALI selection. Our results demonstrate that one of our proposed mechanisms, CALIS, significantly improves radio resource usage and application performance; and the other, CASF, improves the performance of the sequential filling mechanism while maintaining the ability to disable radios when traffic load allows it.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"30 ","pages":"2760-2764"},"PeriodicalIF":4.5,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11626141","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148748135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Corrections to “Joint Access Points-User Association and Caching Placement Strategy for Cell-Free Massive MIMO Systems Based on Soft Actor-Critic Algorithm” 对“基于软Actor-Critic算法的无小区大规模MIMO系统的联合接入点-用户关联和缓存放置策略”的修正

IF 4.5 3区计算机科学

IEEE Communications Letters Pub Date : 2026-01-01 Epub Date: 2026-08-24 DOI: 10.1109/LCOMM.2026.3721664

Rui Wang;Min Shen;Yun He;Xiangyan Liu

引用次数: 0