IET Communications最新文献_第9页

Optimization algorithm of UAV-assisted federated learning resources based on wireless energy harvesting 基于无线能量采集的无人机辅助联邦学习资源优化算法

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-11-05 DOI: 10.1049/cmu2.12857

Youhan Yuan, Qi Zhu

{"title":"Optimization algorithm of UAV-assisted federated learning resources based on wireless energy harvesting","authors":"Youhan Yuan, Qi Zhu","doi":"10.1049/cmu2.12857","DOIUrl":"https://doi.org/10.1049/cmu2.12857","url":null,"abstract":"Federated learning (FL) enhances data privacy and security by enabling multiple terminals to collaboratively train a global model without transferring data to a central location. To tackle the challenges of limited terrestrial communication resources and device energy in FL, a UAV-assisted federated learning and energy collection resource optimization algorithm is proposed. This algorithm harvests the working energy of FL terminals from radio frequency signals transmitted by the UAV via wireless energy collection. Considering energy causality and limited resources, we formulate a problem aimed at minimizing the completion time of FL training tasks. As this problem is NP-hard, we initially employ a greedy algorithm to optimize the UAV's position, then decompose it into three sub-problems: computing resources, power control, and bandwidth allocation. We derive and establish the optimization objective function for computing resources as convex, obtaining the expression for optimal computing resources. The Brent algorithm, based on golden section interpolation, iteratively solves the power distribution sub-problem, while the Lagrange-quasi-Newton algorithm optimizes bandwidth allocation for each user. Simulation results demonstrate that the proposed algorithm effectively reduces training completion time while maintaining training quality.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1621-1631"},"PeriodicalIF":1.5,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12857","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 novel carrier index M-ary differential chaos shift keying modulation scheme 一种新的载波指数m差分混沌移键控调制方案

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-11-04 DOI: 10.1049/cmu2.12859

Yu-Xuan Sun, Zhu Meng, Hua Yang, Guo-Ping Jiang

引用次数: 0

Analysis of error rates and capacity outage of wireless links under jamming and multipath signal fading 干扰和多径信号衰落下无线链路误码率和容量中断分析

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-11-02 DOI: 10.1049/cmu2.12858

Jan Mietzner

{"title":"Analysis of error rates and capacity outage of wireless links under jamming and multipath signal fading","authors":"Jan Mietzner","doi":"10.1049/cmu2.12858","DOIUrl":"https://doi.org/10.1049/cmu2.12858","url":null,"abstract":"The author addresses the question, under which conditions an active jammer will be successful in corrupting a wireless communication link, when both the desired link and the jamming link are subject to multipath signal fading. To this end, a simple closed-form analytical expression is derived for the resulting block-error probability (BLEP) under Nakagami-<math>\u0000 <semantics>\u0000 <mi>m</mi>\u0000 <annotation>$m$</annotation>\u0000 </semantics></math> fading with in general unequal fading parameters for the desired and the jamming link. As a by-product, a novel expression for the corresponding probability of a capacity outage is obtained. An asymptotic analysis and numerical evaluation of the BLEP expression show that in the single-antenna case the jammer will indeed be successful in corrupting the wireless link, unless there is a rather high signal-to-noise ratio (SNR) advantage for the desired link. This even holds true, when signal fading for the jamming link is significantly more severe than for the desired link. Finally, the case of multiple antennas is considered and the benefits of array processing and diversity reception at the desired receiver are explored. It is found that receive array processing can significantly improve the resulting BLEP, provided that the desired link is characterized by favorable fading conditions. On the other hand, diversity reception can significantly improve the BLEP, if the desired link has favorable SNR conditions.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1632-1641"},"PeriodicalIF":1.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12858","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

On weighted sum-rate maximization of full-duplex systems in presence of STAR-RIS 论 STAR-RIS 存在时全双工系统的加权总速率最大化

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-11-02 DOI: 10.1049/cmu2.12855

Mohammad Reza Kavianinia, Mohammad Javad Emadi, Mohammad Ali Sedaghat

{"title":"On weighted sum-rate maximization of full-duplex systems in presence of STAR-RIS","authors":"Mohammad Reza Kavianinia, Mohammad Javad Emadi, Mohammad Ali Sedaghat","doi":"10.1049/cmu2.12855","DOIUrl":"https://doi.org/10.1049/cmu2.12855","url":null,"abstract":"Reflecting intelligent surface (RIS) is one of the key enabling technologies for beyond fifth generation wireless networks to further improve coverage, spectral- and energy-efficiency of wireless networks. Recently, a novel simultaneous transmission and reflection RIS (STAR-RIS) technology is introduced which enables more degrees-of-freedom in simultaneously serving users in reflection and transmission regions of RIS. This paper investigates a STAR-RIS assisted two-user full-duplex communication system, wherein multi-antenna base station (BS) and single-antenna users are subject to maximum power constraints. Firstly, weighted sum rates are computed for three well-known STAR-RIS protocols, e.g. energy splitting, mode selection, and time splitting. Then, for each of the cases, weighted sum rate optimization problem is investigated to find optimal resource allocations, i.e. base station's precoding and combining matrices, coefficients of STAR-RIS, and power allocations. The optimization problem is transferred into multiple convex sub-problems using equivalent weighted minimum mean-square-error forms. Also, by use of the successive convex approximation method, tunable parameters of the STAR-RIS are optimized. Although the original problem is a non-convex one, proposed iterative alternating technique achieves an acceptable sub-optimal performance. Finally, performance of the system is analysed and compared to some baselines to highlight superiority of the STAR-RIS compared to the conventional RIS schemes.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 20","pages":"1967-1982"},"PeriodicalIF":1.5,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12855","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142860143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Implementation of preamble based GFDM prototype for robust 5G systems 基于导言的稳健5G系统GFDM原型实现

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-30 DOI: 10.1049/cmu2.12825

Yaswanth K.N.G.B, Valluri Sivaprasad, Nittala Noel Anurag Prashanth, Sachin Salunkhe, Miroslav Mahdal, Chakravarthy Gunturu

{"title":"Implementation of preamble based GFDM prototype for robust 5G systems","authors":"Yaswanth K.N.G.B, Valluri Sivaprasad, Nittala Noel Anurag Prashanth, Sachin Salunkhe, Miroslav Mahdal, Chakravarthy Gunturu","doi":"10.1049/cmu2.12825","DOIUrl":"https://doi.org/10.1049/cmu2.12825","url":null,"abstract":"Generalized frequency division multiplexing (GFDM) is a flexible block-structured multi-carrier scheme recently proposed for next-generation wireless communication systems. There are various approaches suggested for its analysis and implementation via simulations but testing in real-time environments is not heavily investigated. This paper carries out the real-time implementation of the GFDM system utilizing software-defined radio (SDR) by emphasizing mainly channel estimation and synchronization. Symbol timing, frequency offset, and channel estimate algorithms are applied using a windowed preamble with two identical halves to satisfy low egress noise requirements. Time and frequency estimation is evaluated in terms of residual offsets along with symbol error rate over frequency selective channels. This algorithm is extended to a preamble composed of multiple identical parts. This facilitates a large frequency estimation range at the cost of complexity. For practical validation of the above concepts, the National Instruments (NI) universal software radio peripheral (USRP) 2953R is employed as hardware and it is interfaced with LabVIEW.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1348-1357"},"PeriodicalIF":1.5,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12825","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Symbol detection aided channel prediction in fast-varying massive MIMO systems: Framework and performance analysis 快速变化的大规模MIMO系统中的符号检测辅助信道预测：框架和性能分析

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-28 DOI: 10.1049/cmu2.12843

Wei Gao, Junqiang Xiao, Chuan Liu, Wei Peng

{"title":"Symbol detection aided channel prediction in fast-varying massive MIMO systems: Framework and performance analysis","authors":"Wei Gao, Junqiang Xiao, Chuan Liu, Wei Peng","doi":"10.1049/cmu2.12843","DOIUrl":"https://doi.org/10.1049/cmu2.12843","url":null,"abstract":"The channel in massive multiple-input multiple-output systems is fast-varying that the pilot signal needs to be sent frequently. To obtain timely channel state information with less pilot overheads, a symbol detection aided channel prediction scheme is proposed in this paper. Then, the prediction error lower bound of the proposed scheme within one interval of effective prediction is analysed. Besides, the approximate close-form post-processing signal to noise ratio is derived for zero-forcing detector with imperfect channel predictions. Numerical simulations are implemented to verify the validity of theoretical analysis. The results show that the theoretical expressions have a close match with the real simulated performance under various simulation parameter settings. In addition, the frequency of transmitting the pilot signals can be significantly reduced when adopting this proposed method. Moreover, the application of the proposed scheme can be further expanded when combining it with channel coding, thereby greatly improving the spectrum efficiency of the system.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"19 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12843","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

MAE-SigNet: An effective network for automatic modulation recognition MAE-SigNet：一种有效的自动调制识别网络

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-23 DOI: 10.1049/cmu2.12856

Shilong Zhang, Yu Song, Shubin Wang

{"title":"MAE-SigNet: An effective network for automatic modulation recognition","authors":"Shilong Zhang, Yu Song, Shubin Wang","doi":"10.1049/cmu2.12856","DOIUrl":"https://doi.org/10.1049/cmu2.12856","url":null,"abstract":"The rapid development of the Internet of Things has exacerbated issues such as spectrum resource scarcity, poor communication quality, and high communication energy consumption. Automatic modulation recognition (AMR), a key technology in cognitive radio, has emerged as a crucial solution to these challenges. Deep neural networks have been recently applied in AMR tasks and have achieved remarkable success. However, existing deep learning-based AMR methods often need to consider the sensitivity of models to noise fully. This study proposes a masked autoencoder multi-scale attention feature fusion model (MAE-SigNet). This model integrates a MAE, multi-scale feature extraction module, bidirectional long short-term memory module, and MAM to accomplish the AMR task under low signal-to-noise ratio. Additionally, we optimize the cross-entropy loss of the MAE-SigNet model by introducing MAE decoder reconstruction error, which enhances the model's sensitivity to noise while achieving more accurate feature representation. Experimental results demonstrate that the MAE-SigNet model achieves average recognition rates of 63.77%, 65.28%, and 75.26% on the RML2016.10a, RML2016.10b, and RML2016.04c datasets. Mainly, MAE-SigNet exhibits outstanding performance at various levels of low signal-to-noise ratios from −6 to 4 dB.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1604-1620"},"PeriodicalIF":1.5,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12856","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Joint channel allocation and transmit power control for underlay EH-CRNs: A clustering-based multi-agent DDPG approach 底层eh - crn的联合信道分配和发射功率控制：基于聚类的多智能体DDPG方法

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-21 DOI: 10.1049/cmu2.12852

Xiaoying Liu, Xinyu Kuang, Zefu Li, Kechen Zheng

{"title":"Joint channel allocation and transmit power control for underlay EH-CRNs: A clustering-based multi-agent DDPG approach","authors":"Xiaoying Liu, Xinyu Kuang, Zefu Li, Kechen Zheng","doi":"10.1049/cmu2.12852","DOIUrl":"https://doi.org/10.1049/cmu2.12852","url":null,"abstract":"To address the concerns of energy supply and spectrum scarcity for wireless devices, energy harvesting cognitive radio networks have been proposed. To improve spectrum utilization, secondary users (SUs) access the licensed spectrum in underlay mode, which may cause severe interference to primary users and SUs. The focus is on the underlay energy harvesting cognitive radio networks with multiple pairs of SUs, and formulate the long-term secondary throughput maximization problem as a mixed-integer non-linear programming problem. As traditional approaches could hardly solve the mixed-integer non-linear programming problem well, a centralized deep deterministic policy gradient (C-DDPG) approach is proposed that achieves satisfactory throughput performance. To reduce the computational complexity of C-DDPG, we further propose a clustering-based multi-agent DDPG (CMA-DDPG) approach that combines the advantages of the centralized deep reinforcement learning approach and the distributed deep reinforcement learning approach. In the CMA-DDPG, a novel interference-based clustering algorithm is proposed, which partitions the SUs that cause severe mutual interference into one cluster, and the sizes of state space and action space are smaller than those in C-DDPG. Numerical results validate the superiority of the proposed approaches in terms of the throughput and outage probability, and validate the clustering performance of the interference-based clustering algorithm in terms of the outage probability of the secondary network.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1574-1587"},"PeriodicalIF":1.5,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12852","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

HealthChain: A blockchain-based framework for secure and interoperable electronic health records (EHRs) HealthChain：基于区块链的安全和可互操作的电子健康记录（EHRs）框架

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-21 DOI: 10.1049/cmu2.12839

Ghassan Husnain, Zia Ullah, Muhammad Ismail Mohmand, Mansoor Qadir, Khalid J. Alzahrani, Yazeed Yasin Ghadi, Hend Khalid Alkahtani

{"title":"HealthChain: A blockchain-based framework for secure and interoperable electronic health records (EHRs)","authors":"Ghassan Husnain, Zia Ullah, Muhammad Ismail Mohmand, Mansoor Qadir, Khalid J. Alzahrani, Yazeed Yasin Ghadi, Hend Khalid Alkahtani","doi":"10.1049/cmu2.12839","DOIUrl":"https://doi.org/10.1049/cmu2.12839","url":null,"abstract":"Currently, there is no unified Electronic Health Record (EHR) system connecting major healthcare organizations such as hospitals, medical centers, and specialists. Blockchain technology, with its unique features, provides an ideal platform for developing a large-scale electronic health record system. In this article, the authors introduce HealthChain, a novel blockchain-based secure EHR system that integrates advanced encryption techniques, a robust consent management system, cross-platform interoperability, and enhanced scalability. Unlike existing EHR systems, HealthChain allows patients to have comprehensive control over their health data, ensuring that access is strictly regulated according to their preferences. The experimental results demonstrate several significant improvements over traditional EHR systems. HealthChain reduces data access times by 30%, and its interoperability rate with various healthcare systems is 40% higher than that of other blockchain-based EHR solutions. Security is greatly enhanced, with HealthChain experiencing 50% fewer data breaches due to its advanced encryption and smart contract-based access controls. Moreover, patient satisfaction has increased by 35% as a result of better control and access to their health records. These findings highlight HealthChain as not only a feasible and effective solution for managing health records but also a significant advancement over existing systems.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1451-1473"},"PeriodicalIF":1.5,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12839","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Massive MIMO uplink and downlink joint representation based on couple dictionary learning 基于双字典学习的海量MIMO上下行联合表示

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-18 DOI: 10.1049/cmu2.12848

Qing Yang Guan

{"title":"Massive MIMO uplink and downlink joint representation based on couple dictionary learning","authors":"Qing Yang Guan","doi":"10.1049/cmu2.12848","DOIUrl":"https://doi.org/10.1049/cmu2.12848","url":null,"abstract":"The challenge of jointly representing both the uplink (UL) and downlink (DL) in massive multiple input multiple output (MIMO) systems have been tackled. Considering the angular reciprocity, a couple dictionary learning (CDL) support to enhance performance and address high complexity has been introduced. This approach minimizes the number of pilots and improves accuracy. Currently, accuracy analysis of UL/DL representation primarily relies on simulation. To bridge this gap, a proportion factor (PF) operator is proposed for CDL to assess accuracy. Specifically, a qualitative analysis formula is provided for accuracy and an optimal upper bound is established. Through theoretical proof, it is demonstrated that the accuracy of CDL for representation is mainly influenced by the cross-correlation between the pilot matrix and the dictionary matrix. Inspired by PF operator, an optimal couple dictionary learning (OCDL) algorithm using singular value decomposition (SVD) is introduced to obtain dictionary updating, aiming at high-precision representation. By establishing normalized mean squared error (NMSE), successful representation ratio, bit error rate (BER), and constellation performance, an OCDL algorithm that outperforms existing methods is showcased and channel representation accuracy is enhanced significantly.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1551-1563"},"PeriodicalIF":1.5,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12848","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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