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Interleaved Block-Sparse Transform 交错块解析变换
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-14 DOI: 10.1109/LCOMM.2025.3542388
Lei Liu;Ming Wang;Shufeng Li;Yuhao Chi;Ning Wei;Zhaoyang Zhang
{"title":"Interleaved Block-Sparse Transform","authors":"Lei Liu;Ming Wang;Shufeng Li;Yuhao Chi;Ning Wei;Zhaoyang Zhang","doi":"10.1109/LCOMM.2025.3542388","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3542388","url":null,"abstract":"Low-complexity Bayes-optimal memory approximate message passing (MAMP) is an efficient signal estimation algorithm. However, achieving replica Bayes optimality with MAMP necessitates a large-scale right-unitarily invariant transformation, which is prohibitive in practical systems due to its high computational complexity and hardware costs. To solve this problem, this letter proposes a low-complexity interleaved block-sparse (IBS) transform and a corresponding IBS cross-domain memory approximate message passing (IBS-CD-MAMP) estimator applicable to multiple scenarios, which consist of multiple low-dimensional transform matrices interleaved in an innovative manner and leverage various fast algorithms, to reduce the hardware requirements while mitigating performance loss. Numerical results show that our approach reduces the hardware implementation scale to under 10% and complexity by over 50% with excellent performance in the considered large-scale compressed sensing and multicarrier communication scenarios. This offers efficient solutions for resource-constrained scenarios, which are limited by practical hardware scale and complexity constraints in large-scale communication systems.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"739-743"},"PeriodicalIF":3.7,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821664","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
THz Hybridization in CRAN-Based Vehicular Networks: Performance and Handoff Implications 基于 CRAN 的车载网络中的太赫兹混合：性能和切换影响
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2025.3541579
Sameer K. Singh;Nishant Gupta;Rohit Singh;Brijesh Kumbhani
{"title":"THz Hybridization in CRAN-Based Vehicular Networks: Performance and Handoff Implications","authors":"Sameer K. Singh;Nishant Gupta;Rohit Singh;Brijesh Kumbhani","doi":"10.1109/LCOMM.2025.3541579","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3541579","url":null,"abstract":"In this letter, we propose a modified cloud radio access network (CRAN) configuration to enhance vehicular connectivity. The proposed CRAN integrates sub-6 GHz through Macro-Remote Radio Heads (M-RRHs) and terahertz (THz) waves with Terahertz Stations (TSs). Besides, to effectively utilize the potential of THz and sub-6 GHz bands, we consider the two distinct traffic zones (i.e., dense zone and sparse zones). Further, we derive analytical closed-form expressions for coverage probability and hand-off aware rate for both zones to analyze the performance variations across sub-6 GHz and THz frequencies. Through simulations, we demonstrate the effectiveness of the proposed approach compared to baseline approaches.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"699-703"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821661","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
IEEE Communications Letters Publication Information
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2024.3523126
{"title":"IEEE Communications Letters Publication Information","authors":"","doi":"10.1109/LCOMM.2024.3523126","DOIUrl":"https://doi.org/10.1109/LCOMM.2024.3523126","url":null,"abstract":"","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 2","pages":"i-i"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10884633","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403922","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
A Generalization Method for Indoor Localization via Domain-Invariant Feature Learning
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2025.3541653
Manyu Xue;Zhendong Xu;Jiankun Zhang;Hao Wang;Yuan Shen
{"title":"A Generalization Method for Indoor Localization via Domain-Invariant Feature Learning","authors":"Manyu Xue;Zhendong Xu;Jiankun Zhang;Hao Wang;Yuan Shen","doi":"10.1109/LCOMM.2025.3541653","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3541653","url":null,"abstract":"Deep learning methods have been widely applied in indoor localization to mitigate the impact of non-line-of-sight (NLOS) and multipath effects, achieving high-precision results. However, these methods have to integrate large amounts of data for training and often struggle to adapt to new and unseen scenarios. This letter proposes a domain generalization method based on domain adversarial training (DAT) and mutual information (MI) estimation, where cross-environment generalization localization is achieved by extracting domain-invariant features, eliminating the need for training data from new scenes. Experimental results demonstrate that the proposed method outperforms other deep learning approaches in terms of localization accuracy across various indoor environments.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"704-708"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821588","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
Channel Estimation in RIS-Aided Heterogeneous Wireless Networks via Federated Learning
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2025.3541873
Muhammad Asaad Cheema;Apoorva Chawla;Vinay Chakravarthi Gogineni;Pierluigi Salvo Rossi
{"title":"Channel Estimation in RIS-Aided Heterogeneous Wireless Networks via Federated Learning","authors":"Muhammad Asaad Cheema;Apoorva Chawla;Vinay Chakravarthi Gogineni;Pierluigi Salvo Rossi","doi":"10.1109/LCOMM.2025.3541873","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3541873","url":null,"abstract":"Downlink channel estimation in reconfigurable intelligent surface (RIS)-assisted communication systems employing federated learning (FL) is challenging due to communication/ computational overhead, users heterogeneity, and vulnerability to malicious users. This letter proposes a novel methodology integrating principal component analysis (PCA)-based clustering with FL, tailored for heterogeneous users. The approach effectively identifies regions and users within the cell while minimizing communication/computational overhead associated with clustering, resulting in accurate, resource-efficient, and secure channel estimation. Simulation results demonstrate that the proposed FL strategy achieves estimation performance comparable to the conventional methods while significantly reducing the communication overhead, enhancing the system security, and handling heterogeneous users.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"709-713"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821821","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
Enhanced Signal Sets for Hybrid Reflection Modulation
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2025.3541974
Nabarun Roy;Ananthanarayanan Chockalingam
{"title":"Enhanced Signal Sets for Hybrid Reflection Modulation","authors":"Nabarun Roy;Ananthanarayanan Chockalingam","doi":"10.1109/LCOMM.2025.3541974","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3541974","url":null,"abstract":"Hybrid reflection modulation (HRM) is a promising modulation technique which employs a combination of active and passive reflecting elements in reconfigurable intelligent surfaces (RIS). In addition to applying phase tuning, the active elements apply an amplification to its incident signal, which can alleviate the double-fading effect inherent in RIS systems. The choice of the elements to be made active conveys information bits through indexing. Additional bits can be conveyed through symbols from a modulation alphabet. In this letter, we propose methods to design improved HRM signal sets that achieve better bit error performance. The idea is to schedule the activation of tiles of elements in an ordered way that picks tiles with highest effective response and ignores those with lowest effective response. Specifically, we propose a signal set design procedure that efficiently packs non-equidistant signal points on the positive real line when all active elements use the same amplification factor. We further improve this signal set by obtaining the optimum amplification factors that maximize the minimum Euclidean distance of the signal set. Simulation results show improved performance of the proposed HRM signal sets compared to the that of basic HRM signal set introduced in the recent literature.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"719-723"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821545","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
Decentralized Feedforward-Feedback Interference Cancellation-Based Detector for M-MIMO Systems 基于干扰消除的分散式前馈-反馈检测器用于 M-MIMO 系统
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-13 DOI: 10.1109/LCOMM.2025.3541876
Hua Li;Shiya Hao;Qianqian Li;Yuqing Feng;Jiaqi Feng;Lintao Li;Xiaoming Dai
{"title":"Decentralized Feedforward-Feedback Interference Cancellation-Based Detector for M-MIMO Systems","authors":"Hua Li;Shiya Hao;Qianqian Li;Yuqing Feng;Jiaqi Feng;Lintao Li;Xiaoming Dai","doi":"10.1109/LCOMM.2025.3541876","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3541876","url":null,"abstract":"Decentralized baseband processing (DBP) has been considered a promising solution to tackle the excessive computational complexity and substantial interconnection costs challenges faced by centralized implementations in massive multiple-input multiple-output (M-MIMO) systems. However, most existing decentralized detectors experience considerable performance degradation resulting from limited information sharing among antenna clusters. In this letter, we propose a decentralized feedforward-feedback interference cancellation (FFIC) detection paradigm for DBP architectures, which is well-suited for message-passing-based nonlinear detectors. The expectation propagation (EP) algorithm is employed as an illustrative example. Simulation results demonstrate that the proposed FFIC-EP detector yields significant performance improvements compared to conventional methods, providing a flexible trade-off between performance, complexity, and interconnection costs, especially in scenarios with low BS-antenna-to-user ratios.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"714-718"},"PeriodicalIF":3.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821822","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
Ghost Module and Transformer-Based Lightweight End-to-End Communication Without Pilots
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-11 DOI: 10.1109/LCOMM.2025.3540838
Mi Zhang;Rui Zeng;Jingbo Tan;Jintao Wang;Jian Song
{"title":"Ghost Module and Transformer-Based Lightweight End-to-End Communication Without Pilots","authors":"Mi Zhang;Rui Zeng;Jingbo Tan;Jintao Wang;Jian Song","doi":"10.1109/LCOMM.2025.3540838","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3540838","url":null,"abstract":"Research on pilot-free communication has attracted significant attention for its potential to reduce pilot overhead and enhance spectral efficiency. Despite their competitive performance compared with traditional methods, existing pilot-free end-to-end (E2E) schemes often suffer from high computational complexity and limited BER performance. In this latter, we propose a deep learning-based lightweight pilot-free E2E communication system for frequency-selective fading channels to address these challenges. The proposed network employs the Ghost module to lighten the network design, develops an effective feature extractor by integrating the Dense Block with bilinear production, and adopts a modified transformer-based decoder to achieve precise decoding. Experimental results show that our method achieves the best BER performance and the lowest computational complexity compared to existing pilot-free approaches.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 4","pages":"694-698"},"PeriodicalIF":3.7,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143821546","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
Bit Error Rate Performance of DFT-S-OFDM Systems Under Alpha-Stable Noise
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-10 DOI: 10.1109/LCOMM.2025.3540214
Ruizhi Li;Guo Li;Peixin Zhang;Fengkui Gong
{"title":"Bit Error Rate Performance of DFT-S-OFDM Systems Under Alpha-Stable Noise","authors":"Ruizhi Li;Guo Li;Peixin Zhang;Fengkui Gong","doi":"10.1109/LCOMM.2025.3540214","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3540214","url":null,"abstract":"As a significant non-Gaussian distribution and impulsive noise model, alpha-stable distribution has been widely used in signal processing, since its probability density function (PDF) has heavy tails which corresponds with the impulsive noise samples in the time domain. In this letter, the geometric power of the symmetric alpha-stable (S<inline-formula> <tex-math>$alpha $ </tex-math></inline-formula>S) noise passing through the Discrete Fourier Transform-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) systems on Rayleigh fading channles is derived and the bit error rate (BER) of the DFT-S-OFDM systems on Rayleigh fading channels with S<inline-formula> <tex-math>$alpha $ </tex-math></inline-formula>S noise is further derived. Based on a proposed selection criterion, two approximation models of BER are jointly applied for computational efficiency. Simulation results demonstrate that the derived theoretical and approximate BERs both agree well with the simulated BER curves under various system parameters and impulsive noise conditions.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 3","pages":"645-649"},"PeriodicalIF":3.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611915","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
Enhanced Mode Measurement of Vortex Electromagnetic Wave Based on Aperture Symmetry
IF 3.7 3区 计算机科学
IEEE Communications Letters Pub Date : 2025-02-10 DOI: 10.1109/LCOMM.2025.3540286
Chen He;Yi Liao;Chunhui Ren
{"title":"Enhanced Mode Measurement of Vortex Electromagnetic Wave Based on Aperture Symmetry","authors":"Chen He;Yi Liao;Chunhui Ren","doi":"10.1109/LCOMM.2025.3540286","DOIUrl":"https://doi.org/10.1109/LCOMM.2025.3540286","url":null,"abstract":"The accurate mode measurement of the vortex electromagnetic wave is the basis of the demodulation of vortex electromagnetic waves. However, the hollow divergence characteristic of the vortex electromagnetic wave makes the traditional mode measurement method with full aperture reception difficult to apply in practice. Although the mode measurement method with partial aperture reception can save space resources, it leads to the degradation of demodulation performance. Considering the aperture symmetry property of vortex electromagnetic waves, an improved mode measurement method with virtual full aperture reception is proposed. Simulation results show that low space resource cost and low bit error rate can be achieved by employing the proposed method for the demodulation of vortex electromagnetic waves. In addition, compared with existing mode measurement methods with partial aperture reception, the proposed method has better communication performance.","PeriodicalId":13197,"journal":{"name":"IEEE Communications Letters","volume":"29 3","pages":"650-654"},"PeriodicalIF":3.7,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611912","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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