IET Communications最新文献_第9页

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

Few-shot cross-receiver radio frequency fingerprinting identification based on feature separation 基于特征分离的少射交叉射频指纹识别

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-16 DOI: 10.1049/cmu2.12841

Yuchen Hu, Yihang Du, Xiaoqiang Qiao, Chen Zhao, Tao Zhang, Jiang Zhang

{"title":"Few-shot cross-receiver radio frequency fingerprinting identification based on feature separation","authors":"Yuchen Hu, Yihang Du, Xiaoqiang Qiao, Chen Zhao, Tao Zhang, Jiang Zhang","doi":"10.1049/cmu2.12841","DOIUrl":"https://doi.org/10.1049/cmu2.12841","url":null,"abstract":"Radio frequency fingerprint identification (RFFI) is a widely used technique for authenticating equipment. It identifies transmitters by extracting hardware defects found in the RF front end. Recent research has focused on the impact of transmitters and wireless channels on radio frequency fingerprint (RFF). Most work is based on the same receiver assumption, while the influence of the receiver on RFF remains unresolved. This paper focuses on the impact of receiver hardware characteristics on RFF and proposes a few-shot cross-receiver RFFI method based on feature separation. Data augmentation with noise addition and simulated channels addresses sparse sample issues and enhances the model's robustness to channel variations. Simultaneously, feature separation is realized by reducing the correlation between transmitter and receiver features through classification loss and similarity loss. We evaluate the proposed approaches using a large-scale WiFi dataset. It is shown that when a trained transmitter classifier is deployed on new receivers with only 30 samples per trained transmitter, the average identification accuracy of the proposed method is 83.6%. This accuracy is 9.45% higher than the baseline method without considering transmitter hardware influence. After fine-tuning, the average identification accuracy can reach 98.25%.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1485-1498"},"PeriodicalIF":1.5,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12841","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759702","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 scheme of combining DFO and channel estimation scheme for mobile OFDM systems 一种移动OFDM系统中DFO与信道估计相结合的方案

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-14 DOI: 10.1049/cmu2.12851

Lihua Yang, Yongqi Shao, Ao Chang, Bo Hu

{"title":"A scheme of combining DFO and channel estimation scheme for mobile OFDM systems","authors":"Lihua Yang, Yongqi Shao, Ao Chang, Bo Hu","doi":"10.1049/cmu2.12851","DOIUrl":"https://doi.org/10.1049/cmu2.12851","url":null,"abstract":"To reduce the impact of residual Doppler frequency offset (RDFO), a joint DFO estimation and CE scheme is proposed for the OFDM systems under the high-speed mobile environment. In the paper, the expression of interference power caused by the RDFO is first derived, and the effect of RDFO on time-varying characteristic of channel is analysed. Then, a joint DFO and channel estimation scheme is presented. Specifically, a high-precision DFO estimator based on the convolutional neural network with anti-noise is firstly designed. Due to its ability to use fewer samples to adapt well to the new environments, the meta learning is adopted to estimate the time-varying channel. Moreover, to improve the practicality of the algorithm, the non-ideal values rather than ideal values are used as the training targets in the two neural networks. Additionally, the proposed method is only based on the received signal and does not require any pilots or training sequences, which has higher transmission efficiency compared to the existing algorithms. The research results indicate that the proposed method has good estimation performance and good practicality, and it is suitable for high-speed mobile scenarios.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1564-1573"},"PeriodicalIF":1.5,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12851","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762768","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

Survey on coherent multiband splicing techniques for wideband channel characterization 用于宽带信道表征的相干多带拼接技术综述

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-14 DOI: 10.1049/cmu2.12849

Sigrid Dimce, Falko Dressler

引用次数: 0

ACT-GAN: Radio map construction based on generative adversarial networks with ACT blocks ACT- gan：基于ACT块生成对抗网络的无线电地图构建

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-12 DOI: 10.1049/cmu2.12846

Qi Chen, Jingjing Yang, Ming Huang, Qiang Zhou

{"title":"ACT-GAN: Radio map construction based on generative adversarial networks with ACT blocks","authors":"Qi Chen, Jingjing Yang, Ming Huang, Qiang Zhou","doi":"10.1049/cmu2.12846","DOIUrl":"https://doi.org/10.1049/cmu2.12846","url":null,"abstract":"The radio map serves as a vital tool in assessing wireless communication networks and monitoring radio coverage, providing a visual representation of electromagnetic spatial characteristics. To address the limitation of low accuracy in current radio map construction method, this article presents a novel method based on Generative Adversarial Network (GAN), called ACT-GAN. This method incorporates the aggregated contextual-transformation block, the convolutional block attention module, and the transposed convolutional block into the generator, significantly enhancing the construction accuracy of radio map. The performance of ACT-GAN is validated in three distinct scenarios. The results indicate that, in scenario 1, where the transmitter locations are known, the average reduction in Root Mean Square Error (RMSE) is 14.6%. In scenario 2, where the transmitter locations are known and supplemented with sparse measurement maps, the average reduction in RMSE is 13.3%. Finally, in scenario 3, where the transmitter locations are unknown, the average reduction in RMSE is 7.1%. Moreover, the proposed model exhibits clearer predictive results and can accurately capture multi-scale shadow fading.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1541-1550"},"PeriodicalIF":1.5,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12846","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762565","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

Blockchain-IoT: A revolutionary model for secure data storage and fine-grained access control in internet of things 区块链-物联网：物联网中安全数据存储和细粒度访问控制的革命性模型

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-07 DOI: 10.1049/cmu2.12845

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

{"title":"Blockchain-IoT: A revolutionary model for secure data storage and fine-grained access control in internet of things","authors":"Zia Ullah, Ghassan Husnain, Muhammad Ismail Mohmand, Mansoor Qadir, Khalid J. Alzahrani, Yazeed Yasin Ghadi, Hend Khalid Alkahtani","doi":"10.1049/cmu2.12845","DOIUrl":"https://doi.org/10.1049/cmu2.12845","url":null,"abstract":"With the rapid expansion of the Internet of Things (IoT), cloud storage has emerged as one of the cornerstones of data management, facilitating ubiquitous access and seamless sharing of information. However, with the involvement of a third party, traditional cloud-based storage systems are plagued by security and availability concerns, stemming from centralized control and management architectures. A novel blockchain-IoT model that leverages blockchain technology and decentralized storage mechanisms to address these challenges is presented. The model combines the Ethereum blockchain, interplanetary file system, and attribute-based encryption to ensure secure and resilient storage and sharing of IoT data. Through an in-depth exploration of the system architecture and underlying mechanisms, it is demonstrated how the framework decouples storage functionality from resource-constrained IoT devices, mitigating security risks associated with on-device storage. In addition, data owners and users can easily exchange data with one another through the use of Ethereum smart contracts, fostering a collaborative environment and providing incentives for data sharing. Moreover, an incentive mechanism powered by the FileCoin cryptocurrency is introduced, which motivates and ensures data sharing transparency and integrity between stakeholders. Furthermore, in the proposed blockchain-IoT model, the proof-of-authority system consensus algorithm has been replaced by a delegated proof-of-capacity system, which reduces transaction costs and energy consumption. Using the Rinkby Ethereum official testing network, the proposed model has been demonstrated to be feasible and economical, emphasizing its potential to redefine IoT data management.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1524-1540"},"PeriodicalIF":1.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12845","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759868","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

Modeling and analysis of propagation characteristics of WBAN in hospital ward scenarios 医院病房场景下无线宽带网络的传播特性建模与分析

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-10-07 DOI: 10.1049/cmu2.12844

Lihua Yang, Suwan Wei, Jiawen Ma, Han Xue, Jun Sun

{"title":"Modeling and analysis of propagation characteristics of WBAN in hospital ward scenarios","authors":"Lihua Yang, Suwan Wei, Jiawen Ma, Han Xue, Jun Sun","doi":"10.1049/cmu2.12844","DOIUrl":"https://doi.org/10.1049/cmu2.12844","url":null,"abstract":"To explore the feasibility of high-frequency indoor wireless body area network (WBAN) communications, the propagation characteristics of WBAN in simulated hospital ward scenarios at 11 GHz are studied. Based on the extensive measured data, the impact of the patient's lying angle (LA) on channel characteristics has been analyzed, such as statistical characteristics of path loss (PL), shadowing effect, and root mean square delay spread. Moreover, a PL model with LA factor is presented for the hospital ward scene, and the influence of LA on PL in the presence of height difference is also analyzed. The research results indicate that, the PL caused by LA (abbreviated as PLA) follows a power function with respect to the LA in case of a fixed distance between the transmitter and receiver. When the LA is fixed, PLA exhibits a cubic function relationship with the distance between the transmitter and receiver. In addition, the presence of patient's LA can cause more significant multipath effect. However, the impact of LA gradually weakens as the height difference increases when there is a height difference. The research results provide a theoretical basis and practical basis for utilizing the 11 GHz frequency band in indoor WBAN in the future.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1510-1523"},"PeriodicalIF":1.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12844","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759869","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

Transmission scheme for collaborative-RIS-aided NOMA system with multiple channels 多通道协同ris辅助NOMA系统的传输方案

IF 1.5 4区计算机科学

IET Communications Pub Date : 2024-09-30 DOI: 10.1049/cmu2.12842

Heyi Li, Hong Wang, Peiqi Li, Peiyu Wang

{"title":"Transmission scheme for collaborative-RIS-aided NOMA system with multiple channels","authors":"Heyi Li, Hong Wang, Peiqi Li, Peiyu Wang","doi":"10.1049/cmu2.12842","DOIUrl":"https://doi.org/10.1049/cmu2.12842","url":null,"abstract":"This paper investigates the combination of collaborative reconfigurable intelligent surface (RIS) with non-orthogonal multiple access (NOMA) to enhance the quality of service (QoS) in communication systems. By introducing collaborative RIS, a virtual line-of-sight (LoS) link can be established between the base station (BS) and the users. In this article, the aim is to minimize the total transmit power under the constraint of each user's QoS by optimizing the phase shifts and the power allocation coefficients. To proceed, two approaches are proposed with different complexities to solve the formulated power minimization problem. Specifically, in the first method, a sub-channel allocation scheme based on the user locations is developed, and the phase shifts are optimized to obtain the minimum transmit power for fixed channel assignment, which is further addressed by using the alternating optimization and the sequence rotation methods. In the second approach, a joint optimization algorithm that achieves the channel assignment vectors and the phase shift coefficients in an alternative manner, and a sub-channel assignment algorithm based on the equivalent channel gain is developed. The simulation results show that the proposed transmission scheme has the capability of improving system performance significantly compared with the conventional schemes.","PeriodicalId":55001,"journal":{"name":"IET Communications","volume":"18 19","pages":"1499-1509"},"PeriodicalIF":1.5,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/cmu2.12842","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762702","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