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Reconfigurable Holographic Surface-Aided Distributed MIMO Radar Systems 可重构全息表面辅助分布式MIMO雷达系统
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-10 DOI: 10.1109/LCOMM.2025.3559500
Qian Li;Ziang Yang;Dou Li;Hongliang Zhang
{"title":"Reconfigurable Holographic Surface-Aided Distributed MIMO Radar Systems","authors":"Qian Li;Ziang Yang;Dou Li;Hongliang Zhang","doi":"10.1109/LCOMM.2025.3559500","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3559500","url":null,"abstract":"Distributed phased Multiple-Input Multiple-Output (phased-MIMO) radar systems have attracted wide attention in target detection and tracking. However, phase-shifting circuits in phased subarrays lead to high power consumption and hardware cost. The reconfigurable holographic surface (RHS) offers an energy-efficient and cost-effective alternative to address this issue. In this letter, we propose RHS-aided distributed MIMO radar systems that provide more accurate multi-target detection with equivalent power consumption and hardware cost compared to distributed phased-MIMO radar systems. The RHS realizes beam steering by regulating the radiation amplitude of its elements, making conventional beamforming schemes designed for phased arrays inapplicable. To maximize detection accuracy, we design an amplitude-controlled beamforming scheme for multiple RHS subarrays. Simulations validate the superiority of the proposed scheme over the distributed phased-MIMO radar scheme and reveal the optimal allocation between coherent processing gain and diversity gain for optimal system performance with fixed hardware resources.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1295-1299"},"PeriodicalIF":3.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264269","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 Image Semantic Communication System Based on GAN and Relative Position-Encoding 基于GAN和相对位置编码的图像语义通信系统
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-09 DOI: 10.1109/LCOMM.2025.3559202
Ziqi Zhang;Weijie Tan;Chunguo Li
{"title":"An Image Semantic Communication System Based on GAN and Relative Position-Encoding","authors":"Ziqi Zhang;Weijie Tan;Chunguo Li","doi":"10.1109/LCOMM.2025.3559202","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3559202","url":null,"abstract":"In image semantic communication, the complex wireless channel environment leads to the loss of image details and performance degradation during transmission. To address this issue, we propose an image semantic communication system based on Generative Adversarial Networks (GAN) and Relative Position-Encoding (RPE), named GAN-RpeSC. Specifically, in the system design, we introduce the GAN network at the output of the semantic communication framework to enhance the image restoration. We integrate the RPE module into the Visual Transformer (ViT) module, adding the RPE module to its Multihead Self Attention (MHSA), so that the model can better capture the spatial location information of the image. Experimental results show that the proposed GAN-RpeSC has significant advantages in improving image transmission quality, with a 0.3 dB improvement in peak signal-to-noise ratio (PSNR) compared to the ViT module alone.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1280-1284"},"PeriodicalIF":3.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272771","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
Integrated Sensing and Communications for Reconfigurable Intelligent Surface-Aided Cell-Free Networks 可重构智能表面辅助无单元网络的集成传感与通信
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-09 DOI: 10.1109/LCOMM.2025.3558995
Shanza Shakoor;Quang Nhat Le;Een-Kee Hong;Berk Canberk;Trung Q. Duong
{"title":"Integrated Sensing and Communications for Reconfigurable Intelligent Surface-Aided Cell-Free Networks","authors":"Shanza Shakoor;Quang Nhat Le;Een-Kee Hong;Berk Canberk;Trung Q. Duong","doi":"10.1109/LCOMM.2025.3558995","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558995","url":null,"abstract":"This work explores a cell-free integrated sensing and communication (CF-ISAC) framework in which distributed access points work together to support communication users (UEs) with assistance from multiple reconfigurable intelligent surfaces (RISs) while simultaneously performing target sensing. An effective strategy is introduced for the joint optimization of communication parameters, sensing beamforming designs, and reflecting coefficients, with the goal of enhancing the minimum signal-to-interference-plus-noise ratio (SINR) among all UEs. To address the complexity of this non-convex optimization problem, a robust alternating optimization method is designed. The numerical results confirm that the proposed approach significantly boosts the minimum SINR in CF-ISAC systems, demonstrating the advantages of utilizing RISs.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1275-1279"},"PeriodicalIF":3.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272775","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
Enhancing Belief Propagation Decoding of Polar Codes: A Reinforcement Learning Approach 增强极性码的信念传播解码：一种强化学习方法
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-09 DOI: 10.1109/LCOMM.2025.3559466
Mohsen Moradi;Salman Habib;David G. M. Mitchell
{"title":"Enhancing Belief Propagation Decoding of Polar Codes: A Reinforcement Learning Approach","authors":"Mohsen Moradi;Salman Habib;David G. M. Mitchell","doi":"10.1109/LCOMM.2025.3559466","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3559466","url":null,"abstract":"Short block-length polar-like codes showcase exceptional error correction performance (ECP) using sequential decoding or successive cancellation list decoding with a large list size. However, achieving a high level of reliability with these methods involves high-latency decoding. To meet the growing demand for low-latency communication with acceptable complexity, belief propagation (BP) decoding emerges as an attractive option, although its ECP is known to fall short of those high-latency alternatives. In this letter, we propose an enhanced BP decoding approach for polar codes, leveraging reinforcement learning (RL) to optimize the message-passing schedule. Moreover, we investigate the design of the polar code rate profile and corresponding Tanner graph representation to enhance the benefits of RL. Numerical results demonstrate a performance gain of more than 1 dB for polar codes with a length of 128 and a rate of 0.5 compared to conventional BP decoding alone at high <inline-formula> <tex-math>$E_{b}/N_{0}$ </tex-math></inline-formula> values, demonstrating the promise of the proposed approach.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1285-1289"},"PeriodicalIF":3.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264154","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
RFFI Protocols Using Antenna Mutual Coupling and Power Amplifier Nonlinear Memory Effects 基于天线互耦和功率放大器非线性记忆效应的RFFI协议
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-08 DOI: 10.1109/LCOMM.2025.3558555
Yuepei Li;Symon K. Podilchak;Junqing Zhang;Simon L. Cotton;Tharmalingam Ratnarajah;Yuan Ding
{"title":"RFFI Protocols Using Antenna Mutual Coupling and Power Amplifier Nonlinear Memory Effects","authors":"Yuepei Li;Symon K. Podilchak;Junqing Zhang;Simon L. Cotton;Tharmalingam Ratnarajah;Yuan Ding","doi":"10.1109/LCOMM.2025.3558555","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558555","url":null,"abstract":"This letter presents a radio frequency fingerprinting identification (RFFI) protocol in wireless links with multi-antenna array transmitters. Multi-antenna systems are widely used in wireless communication systems for diversity and/or multiplexing. The mutual coupling (MC) effects arising from electromagnetic interactions between adjacent array elements can influence the RF characteristics of the transmitter and eventually the performance of the established links. In this letter, a novel RFF strategy is proposed to expand the differences in the RFF characteristics among wireless devices from the same vendor, with the goal of massively improving RFF classification accuracy in low to medium signal-to-noise ratio (SNR) channel conditions. Experimental results show that when classifying six power amplifiers (PAs) from the same vendor, 21% to 62% average classification accuracy improvement can be achieved by enlarging the RFF feature differences arising from the PA nonlinearity arising from the array coupling.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1250-1254"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272636","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
Sensing Capacity for Integrated Sensing and Communication Systems in Low-Altitude Economy 低空经济下综合传感与通信系统的传感能力
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-08 DOI: 10.1109/LCOMM.2025.3558295
Jiahua Wan;Hong Ren;Cunhua Pan;Zhenkun Zhang;Songtao Gao;Yiming Yu;Chengzhong Wang
{"title":"Sensing Capacity for Integrated Sensing and Communication Systems in Low-Altitude Economy","authors":"Jiahua Wan;Hong Ren;Cunhua Pan;Zhenkun Zhang;Songtao Gao;Yiming Yu;Chengzhong Wang","doi":"10.1109/LCOMM.2025.3558295","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558295","url":null,"abstract":"The burgeoning significance of the low-altitude economy (LAE) has garnered considerable interest, largely fuelled by the widespread deployment of autonomous aerial vehicles (AAVs). To tackle the challenges associated with the detection of unauthorized AAVs and the efficient scheduling of authorized AAVs, this letter introduces a novel performance metric, termed sensing capacity, for integrated sensing and communication (ISAC) systems. This metric, which quantifies the capability of a base station (BS) to detect multiple AAVs simultaneously, leverages signal-to-noise ratio (SNR) and probability of detection (PD) as key intermediate variables. Through mathematical derivations, we can derive a closed-form solution for the maximum number of AAVs that can be detected by the BS while adhering to a specific SNR constraint. An approximate solution based on PD constraints is proposed to facilitate the efficient determination of the threshold for the maximum number of detectable AAVs. To generalize the analysis, we extend our investigation to practical scenarios with closely-spaced AAVs, incorporating inter-AAV interference effects. The accuracy of this analytical approach is verified through extensive simulation results.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1240-1244"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272691","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
Erlang Model for Multi-Type Data Flow 多类型数据流的Erlang模型
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-08 DOI: 10.1109/LCOMM.2025.3558872
Liuquan Yao;Pei Yang;Zhichao Liu;Wenyan Li;Jianghua Liu;Zhi-Ming Ma
{"title":"Erlang Model for Multi-Type Data Flow","authors":"Liuquan Yao;Pei Yang;Zhichao Liu;Wenyan Li;Jianghua Liu;Zhi-Ming Ma","doi":"10.1109/LCOMM.2025.3558872","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558872","url":null,"abstract":"The well-known Erlang teletraffic models were estimated to guild the infrastructure construction in communication societies for stable data requirements. However, with the development of information technology, requirements for data flow have become diverse. Particularly, when multi-type data flow (MDF) is used, games, videos, calls, etc. are all requirements. Thus, there may be a constant switch between these requirements, and also multi-type requirements at the same time. Consequently, the demands of users change over time, which prevents the traditional teletraffic analysis from being applied directly to infrastructure construction for MDF. This letter proposes new probabilistic models to discuss the blocking probabilities of MDF, whose requirements depend on the time of demand duration, and analyzes the models in three states: non-tolerance, tolerance and delay, in order to meet a more general and practical data flow utilization. When the requirement random variables are co-distributed with respect to time, we prove the practicability of the Erlang Multirate Loss Model (EMLM) under MDF cases, from a mathematical perspective by discretizing time and error analysis. An algorithm of pre-allocating resources is given to guild the construction of base resources for MDF.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1265-1269"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272778","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
Deep Learning-Enhanced Channel Prediction for XL-MIMO Systems xml - mimo系统的深度学习增强信道预测
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-08 DOI: 10.1109/LCOMM.2025.3558838
Chaoqun Cao;Ming Chen;Yusi Zhang;Yijin Pan;Yihan Cang;Zidi Zhan
{"title":"Deep Learning-Enhanced Channel Prediction for XL-MIMO Systems","authors":"Chaoqun Cao;Ming Chen;Yusi Zhang;Yijin Pan;Yihan Cang;Zidi Zhan","doi":"10.1109/LCOMM.2025.3558838","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558838","url":null,"abstract":"With the dramatically increasing number of antennas, wireless channel becomes sophisticated and the pilot overhead becomes intolerable. In this letter, we construct the last-bounce cluster (LBC) based channel model to capture the spatial-temporal characteristics in extra-large multiple-input-multiple-output (XL-MIMO) systems. Then, we formulate the channel prediction problem to conserve the pilots. Leveraging the advantages of deep learning (DL), we propose convolutional neural network (CNN)-Transformer based channel prediction method (CTCP) to enhance the spatial-temporal information extraction of the channel. Simulation results validate that CTCP effectively extracts the spatial-temporal correlations of the channel, and enhances the trade-off between accuracy and comlexity in channel prediction for XL-MIMO systems.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1260-1264"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272773","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
Faster and Safer: Seamless Group-Based Cross-Layer Authentication and Key Agreement for 6G 更快更安全：6G无缝组跨层认证和密钥协议
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-08 DOI: 10.1109/LCOMM.2025.3558927
Yuandong Wu;Guoshun Nan;Xiaosu Xue;Huici Wu;Xiaofeng Tao
{"title":"Faster and Safer: Seamless Group-Based Cross-Layer Authentication and Key Agreement for 6G","authors":"Yuandong Wu;Guoshun Nan;Xiaosu Xue;Huici Wu;Xiaofeng Tao","doi":"10.1109/LCOMM.2025.3558927","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558927","url":null,"abstract":"The upcoming 6G networks will support an unprecedented number of connected devices, thus greatly expanding the attack surfaces. Access authentication helps mitigate these threats, but may introduce prohibitive costs due to massive connections operating in high-frequency bands on resource-constrained devices. This motivates the proposal of SeaAKA, a novel protocol designed to achieve efficient authentication in 6G networks. The SeaAKA protocol implements seamless group-based cross-layer authentication through a novel voting mechanism that coordinates physical-layer authentication (using lightweight approaches) with upper-layer verification (employing Shamir’s secret sharing). This integration reduces computational and communication overhead during repeated authentication cycles while maintaining high accuracy. Security analysis using BAN logic confirms SeaAKA’s resilience against replay attacks along with data integrity/privacy preservation. Evaluations demonstrate SeaAKA’s superior efficiency over existing methods, reducing communication overhead from 4.244 to 0.0006 ms and computational overhead from 2,432 to 512 bits.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1270-1274"},"PeriodicalIF":3.7,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272692","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
IRS-NOMA Transmission in Cooperative Networks 协同网络中的IRS-NOMA传输
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-04-07 DOI: 10.1109/LCOMM.2025.3558252
Vahid Zibakalam;Mehrdad Ardebilipour;Bahareh Akhbari;Abolqasem Hesam
{"title":"IRS-NOMA Transmission in Cooperative Networks","authors":"Vahid Zibakalam;Mehrdad Ardebilipour;Bahareh Akhbari;Abolqasem Hesam","doi":"10.1109/LCOMM.2025.3558252","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3558252","url":null,"abstract":"In this letter, we propose a novel scheme that utilizes a hybrid relay and intelligent reconfigurable surface (IRS) to enable simultaneous transmission of two symbols from a source to a destination using a non-orthogonal multiple access (NOMA) scheme. As the proposed scheme benefits from the advantages of the multiplexing technique, the spectral efficiency increases. In the devised scheme, the achievable sum-rate is maximized by optimizing the IRS coefficients and the NOMA power allocation coefficients. We derive closed-form expressions for these optimal coefficients based on the channel state information. Simulation results demonstrate the superiority of the proposed scheme compared to benchmark scenarios.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 6","pages":"1235-1239"},"PeriodicalIF":3.7,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144272647","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
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