Pub Date : 2024-08-08DOI: 10.26636/jtit.2024.3.1582
Noor Haider Saeed, Malik Jasim Farhan, Qasim Hadi Kareem
This paper presents a compact, high-isolation MIMO antenna with physical dimensions of 68 × 68 × 0.8 mm, designed for use in 5G applications. The antenna's bandwidth ranges from 3.25 GHz to 4.34 GHz and it offers a gain of 4.3 dBi, making it suitable for applications relying on 5G technology. Several improvements have been introduced to improve its overall efficiency, such as adjustments to the ground plane and integrating apertures in the radiating patch. The alterations referred to above were optimized using the sweep parameter method to ensure that their best configurations are achieved. Furthermore, much attention has been paid to enhance isolation by ensuring all terminals are positioned precisely at 90° angles. The CST Studio Suite was utilized to design and thoroughly simulate the proposed MIMO antenna.
本文介绍了一种物理尺寸为 68 × 68 × 0.8 毫米的紧凑型高隔离 MIMO 天线，设计用于 5G 应用。该天线的带宽范围为 3.25 GHz 至 4.34 GHz，增益为 4.3 dBi，适用于依赖 5G 技术的应用。为了提高整体效率，该天线还进行了多项改进，如调整接地平面和在辐射贴片上集成孔径。上述改动均采用扫频参数法进行了优化，以确保达到最佳配置。此外，还十分注意通过确保所有终端精确定位在 90° 角来提高隔离度。CST Studio Suite 用于设计和全面模拟拟议的多输入多输出天线。
{"title":"High-isolation Quad-port MIMO Antenna for 5G Applications","authors":"Noor Haider Saeed, Malik Jasim Farhan, Qasim Hadi Kareem","doi":"10.26636/jtit.2024.3.1582","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1582","url":null,"abstract":"This paper presents a compact, high-isolation MIMO antenna with physical dimensions of 68 × 68 × 0.8 mm, designed for use in 5G applications. The antenna's bandwidth ranges from 3.25 GHz to 4.34 GHz and it offers a gain of 4.3 dBi, making it suitable for applications relying on 5G technology. Several improvements have been introduced to improve its overall efficiency, such as adjustments to the ground plane and integrating apertures in the radiating patch. The alterations referred to above were optimized using the sweep parameter method to ensure that their best configurations are achieved. Furthermore, much attention has been paid to enhance isolation by ensuring all terminals are positioned precisely at 90° angles. The CST Studio Suite was utilized to design and thoroughly simulate the proposed MIMO antenna.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"4 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-17DOI: 10.26636/jtit.2024.3.1454
F. Ponti, Fabrizio Frezza, P. Simeoni, Raffaele Parisi
Optimization of machine learning architectures is essential in determining the efficacy and the applicability of any neural architecture to real world problems. In this work a generalized Newton's method (GNM) is presented as a powerful approach to learning in deep neural networks (DNN). This technique was compared to two popular approaches, namely the stochastic gradient descent (SGD) and the Adam algorithm, in two popular classification tasks. The performance of the proposed approach confirmed it as an attractive alternative to state-of-the-art first order solutions. Due to the good results presented in the case of shallow DNN, in the last part of the article an hybrid optimization method is presented. This method consists in combining two optimization algorithms, i.e. GNM and Adam or GNM and SGD, during the training phase within the layers of the neural network. This configuration aims to benefit from the strengths of both first- and second-order algorithms. In this case a convolutional neural network is considered and its parameters are updated with a different optimization algorithm. Also in this case, the hybrid approach returns the best performance with respect to the first order algorithms.
机器学习架构的优化对于确定任何神经架构在实际问题中的有效性和适用性至关重要。本研究提出了广义牛顿法（GNM），作为深度神经网络（DNN）学习的有力方法。在两个流行的分类任务中，该技术与随机梯度下降法（SGD）和亚当算法这两种流行方法进行了比较。所提方法的性能证实，它是最先进的一阶解决方案的一个有吸引力的替代方案。由于在浅层 DNN 案例中取得了良好的结果，文章的最后一部分介绍了一种混合优化方法。这种方法是在神经网络各层的训练阶段结合两种优化算法，即 GNM 和 Adam 或 GNM 和 SGD。这种配置旨在从一阶和二阶算法的优势中获益。在这种情况下，考虑的是卷积神经网络，并采用不同的优化算法更新其参数。同样在这种情况下，混合方法比一阶算法的性能更好。
{"title":"A Generalized Learning Approach to Deep Neural Networks","authors":"F. Ponti, Fabrizio Frezza, P. Simeoni, Raffaele Parisi","doi":"10.26636/jtit.2024.3.1454","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1454","url":null,"abstract":"Optimization of machine learning architectures is essential in determining the efficacy and the applicability of any neural architecture to real world problems. In this work a generalized Newton's method (GNM) is presented as a powerful approach to learning in deep neural networks (DNN). This technique was compared to two popular approaches, namely the stochastic gradient descent (SGD) and the Adam algorithm, in two popular classification tasks. The performance of the proposed approach confirmed it as an attractive alternative to state-of-the-art first order solutions. Due to the good results presented in the case of shallow DNN, in the last part of the article an hybrid optimization method is presented. This method consists in combining two optimization algorithms, i.e. GNM and Adam or GNM and SGD, during the training phase within the layers of the neural network. This configuration aims to benefit from the strengths of both first- and second-order algorithms. In this case a convolutional neural network is considered and its parameters are updated with a different optimization algorithm. Also in this case, the hybrid approach returns the best performance with respect to the first order algorithms.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141830987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-11DOI: 10.26636/jtit.2024.3.1693
Dominik Ryżko
The paper proposes a modification of the existing distributed forward-backward algorithm for finding strongly connected components in directed graphs. The modification aims at improving the parallelism of the algorithm by increasing the branching factor while dividing the workload. Instead of randomly picking the pivot vertex, a heuristic technique is used which allows more sub-tasks to be generated, on average, for the subsequent step of the algorithm. The work describes suitable algorithm modifications and presents empirical results, proving suitability of the approach in question.
{"title":"Increasing Parallelism in Forward-backward Distributed Algorithm for Finding Strongly Connected Components of Directed Graphs","authors":"Dominik Ryżko","doi":"10.26636/jtit.2024.3.1693","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1693","url":null,"abstract":"The paper proposes a modification of the existing distributed forward-backward algorithm for finding strongly connected components in directed graphs. The modification aims at improving the parallelism of the algorithm by increasing the branching factor while dividing the workload. Instead of randomly picking the pivot vertex, a heuristic technique is used which allows more sub-tasks to be generated, on average, for the subsequent step of the algorithm. The work describes suitable algorithm modifications and presents empirical results, proving suitability of the approach in question.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"107 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141657332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-07DOI: 10.26636/jtit.2024.3.1518
Noor S. Asaad, Adham M. Saleh, Mahmod A. Alzubaidy
In this paper, a compact 2×2 hexagon ring-shaped MIMO antenna operating at the terahertz band is proposed for future 6G wireless communication applications. The antenna is designed using graphene, due to its unique high-speed transmission capabilities. DGS and NL decoupling approaches are applied to enhance isolation between the two radiating elements. A parametric study is performed to investigate the significance of using these methods. Performance in terms of different metrics is studied using the CST Microwave Studio simulator. The final outcomes show that the proposed MIMO antenna achieves 23 dB of isolation, 0.004859 of ECC, 0.004 bits/sec/Hz of CCL, and efficiency of 98%.
本文针对未来 6G 无线通信应用，提出了一种工作在太赫兹频段的紧凑型 2×2 六边形环形 MIMO 天线。由于石墨烯具有独特的高速传输能力，该天线的设计采用了石墨烯。采用 DGS 和 NL 去耦方法来增强两个辐射元件之间的隔离。为研究使用这些方法的意义，进行了参数研究。使用 CST Microwave Studio 仿真器研究了不同指标的性能。最终结果表明，拟议的 MIMO 天线实现了 23 dB 的隔离度、0.004859 的 ECC、0.004 比特/秒/赫兹的 CCL 和 98% 的效率。
{"title":"Analyzing Performance of THz Band Graphene-Based MIMO Antenna for 6G Applications","authors":"Noor S. Asaad, Adham M. Saleh, Mahmod A. Alzubaidy","doi":"10.26636/jtit.2024.3.1518","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1518","url":null,"abstract":"In this paper, a compact 2×2 hexagon ring-shaped MIMO antenna operating at the terahertz band is proposed for future 6G wireless communication applications. The antenna is designed using graphene, due to its unique high-speed transmission capabilities. DGS and NL decoupling approaches are applied to enhance isolation between the two radiating elements. A parametric study is performed to investigate the significance of using these methods. Performance in terms of different metrics is studied using the CST Microwave Studio simulator. The final outcomes show that the proposed MIMO antenna achieves 23 dB of isolation, 0.004859 of ECC, 0.004 bits/sec/Hz of CCL, and efficiency of 98%.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":" 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141671144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-02DOI: 10.26636/jtit.2024.3.1624
Samvel Antonyan, Hovhannes Gomtsyan
This article presents a novel multiprobe planar near-field range (PNFR) measurement system. The said system simplifies the overall mechanical design, making it simpler than the existing scanning probe PNFR measurements, and also significantly reduces testing time. A dielectric-based probe is introduced to reduce the antenna size, thereby improving resolution. The probe under consideration is an antipodal Vivaldi antenna offering broadband support and ensuring wideband characteristics of aerials. Numerical results for representative X-band antenna models, presented in the Matlab environment, demonstrate robust performance of the developed measurement system.
本文介绍了一种新型多探针平面近场范围（PNFR）测量系统。该系统简化了整体机械设计，使其比现有的扫描探头 PNFR 测量更简单，同时还大大缩短了测试时间。该系统采用了基于介质的探头，以减小天线尺寸，从而提高分辨率。所考虑的探头是一个反脚 Vivaldi 天线，可提供宽带支持并确保天线的宽带特性。在 Matlab 环境中展示了代表性 X 波段天线模型的数值结果，证明了所开发测量系统的强大性能。
{"title":"Multiprobe Planar Near-field Range Antenna Measurement System with Improved Performance","authors":"Samvel Antonyan, Hovhannes Gomtsyan","doi":"10.26636/jtit.2024.3.1624","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1624","url":null,"abstract":"This article presents a novel multiprobe planar near-field range (PNFR) measurement system. The said system simplifies the overall mechanical design, making it simpler than the existing scanning probe PNFR measurements, and also significantly reduces testing time. A dielectric-based probe is introduced to reduce the antenna size, thereby improving resolution. The probe under consideration is an antipodal Vivaldi antenna offering broadband support and ensuring wideband characteristics of aerials. Numerical results for representative X-band antenna models, presented in the Matlab environment, demonstrate robust performance of the developed measurement system.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"5 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141684981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-02DOI: 10.26636/jtit.2024.3.1589
Menaa Saber, Khelil Abdellatif
Selection strategies prove to be a valuable approach in mitigating complexity associated with antenna selection (AS) and relay selection (RS), optimizing signal transmission through a streamlined number of antennas/relays, and enhancing overall system performance. This paper offers a comprehensive analysis, deriving closed-form expressions for the outage probability (OP) and throughput in proposed scenarios that leverage the best relay selection (BRS) and transmit antenna selection (TAS) protocol for cooperative non-orthogonal multiple access (CNOMA), along with partial relay selection (PRS) and TAS protocol for CNOMA. The study extends to Rayleigh fading channels, considering practical impairments such as successful interference cancellation (SIC) error, channel estimation error (CEE), and feedback delay error. In comparing the proposed system to conventional CNOMA, our findings highlight the substantial impact of SIC, CEE, and feedback delay imperfections on the performance of both proposed scenarios. Notably, the application of BRS-based TAS protocol outperforms PRS-based TAS in terms of OP and throughput. The close alignment between analytical, asymptotic, and simulation results attests to the credibility of conducted analysis.
事实证明，选择策略是降低天线选择（AS）和中继选择（RS）复杂性、通过精简天线/中继数量优化信号传输以及提高系统整体性能的重要方法。本文进行了全面分析，推导出了在拟议方案中中断概率（OP）和吞吐量的闭式表达式，这些方案利用了合作非正交多址接入（CNOMA）的最佳中继选择（BRS）和发射天线选择（TAS）协议，以及 CNOMA 的部分中继选择（PRS）和 TAS 协议。研究扩展到了瑞利衰减信道，并考虑到了成功干扰消除（SIC）误差、信道估计误差（CEE）和反馈延迟误差等实际损伤。在将拟议系统与传统 CNOMA 系统进行比较时，我们的研究结果凸显了 SIC、CEE 和反馈延迟缺陷对两种拟议方案性能的重大影响。值得注意的是，基于 BRS 的 TAS 协议在 OP 和吞吐量方面优于基于 PRS 的 TAS。分析、渐近和模拟结果之间的密切吻合证明了所做分析的可信度。
{"title":"Performance Analysis of Antenna-relay Selection in CNOMA Systems under Practical Impairments","authors":"Menaa Saber, Khelil Abdellatif","doi":"10.26636/jtit.2024.3.1589","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1589","url":null,"abstract":"Selection strategies prove to be a valuable approach in mitigating complexity associated with antenna selection (AS) and relay selection (RS), optimizing signal transmission through a streamlined number of antennas/relays, and enhancing overall system performance. This paper offers a comprehensive analysis, deriving closed-form expressions for the outage probability (OP) and throughput in proposed scenarios that leverage the best relay selection (BRS) and transmit antenna selection (TAS) protocol for cooperative non-orthogonal multiple access (CNOMA), along with partial relay selection (PRS) and TAS protocol for CNOMA. The study extends to Rayleigh fading channels, considering practical impairments such as successful interference cancellation (SIC) error, channel estimation error (CEE), and feedback delay error. In comparing the proposed system to conventional CNOMA, our findings highlight the substantial impact of SIC, CEE, and feedback delay imperfections on the performance of both proposed scenarios. Notably, the application of BRS-based TAS protocol outperforms PRS-based TAS in terms of OP and throughput. The close alignment between analytical, asymptotic, and simulation results attests to the credibility of conducted analysis.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"52 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141687502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-02DOI: 10.26636/jtit.2024.3.1623
Grigor Tsaturyan, Hovhannes Gomtsyan
IEEE 802.15.4z-compliant ultra-wideband (UWB) devices are becoming ever more popular in contemporary radio engineering systems. Such systems are capable of precisely measuring distances (with their accuracy expressed in centimeters), are immune to interference, offer low latency and transmit data in an energy-efficient manner. Widespread adoption of UWB technology has triggered significant demand for testing integrated circuits these systems rely on, prompting the development of new testing methods to meet the ever increasing requirements in terms of testing speed and reliability. The same applies to sensitivity tests, in the course of which up to 2000 different packets may be received. The process of generating and analyzing such a large number of packets is time consuming. Furthermore, if multiple devices need to be tested simultaneously, the duration of the test will be multiplied accordingly. In such a context, the article investigates the lead time required to generate 2000 UWB packets using conventional methods and proposes a novel approach to significantly reduce packet generation time and improve testing efficiency.
{"title":"Testing Time Optimization Method for IEEE 802.15.4z Ultra-wideband Integrated Circuits","authors":"Grigor Tsaturyan, Hovhannes Gomtsyan","doi":"10.26636/jtit.2024.3.1623","DOIUrl":"https://doi.org/10.26636/jtit.2024.3.1623","url":null,"abstract":"IEEE 802.15.4z-compliant ultra-wideband (UWB) devices are becoming ever more popular in contemporary radio engineering systems. Such systems are capable of precisely measuring distances (with their accuracy expressed in centimeters), are immune to interference, offer low latency and transmit data in an energy-efficient manner. Widespread adoption of UWB technology has triggered significant demand for testing integrated circuits these systems rely on, prompting the development of new testing methods to meet the ever increasing requirements in terms of testing speed and reliability. The same applies to sensitivity tests, in the course of which up to 2000 different packets may be received. The process of generating and analyzing such a large number of packets is time consuming. Furthermore, if multiple devices need to be tested simultaneously, the duration of the test will be multiplied accordingly. In such a context, the article investigates the lead time required to generate 2000 UWB packets using conventional methods and proposes a novel approach to significantly reduce packet generation time and improve testing efficiency.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"19 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141685949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-12DOI: 10.26636/jtit.2024.2.1557
M. Addad, Hanane Meriem Toaba, A. Djebbari
In this paper, channel estimation capabilities of a multiple-input multiple-output (MIMO) system using superimposed training sequences are investigated. A new expression for estimation-error variance is derived. It is shown that the training sequences must be balanced and must have specific correlation properties. The latter are required only in a specific zone. Sequences that satisfy these criteria exist and are referred to as zero-correlation zone (ZCZ) solutions. Consequently, by using balanced ZCZ sequences, harmful direct current (DC) offset can be removed. Owing to their zero-cross correlation, interference from other transmitting antennas may be eliminated. Furthermore, a closed-form expression of the estimation-error variance can be obtained due to their impulse-like autocorrelation. To increase the number of antennas in the MIMO system, a new construction of ZCZ sequence set is proposed, in which all sequences are balanced
本文研究了使用叠加训练序列的多输入多输出（MIMO）系统的信道估计能力。得出了估计误差方差的新表达式。研究表明，训练序列必须是平衡的，而且必须具有特定的相关特性。后者仅在特定区域有要求。满足这些标准的序列被称为零相关区（ZCZ）解决方案。因此，通过使用平衡的 ZCZ 序列，可以消除有害的直流偏移。由于其零交叉相关性，可以消除来自其他发射天线的干扰。此外，由于 ZCZ 序列具有脉冲式自相关性，因此可以得到估计误差方差的闭式表达式。为了增加 MIMO 系统中的天线数量，提出了一种新的 ZCZ 序列集结构，其中所有序列都是平衡的
{"title":"Exact Analysis of MIMO Channel Estimation Based on Superimposed Training","authors":"M. Addad, Hanane Meriem Toaba, A. Djebbari","doi":"10.26636/jtit.2024.2.1557","DOIUrl":"https://doi.org/10.26636/jtit.2024.2.1557","url":null,"abstract":"In this paper, channel estimation capabilities of a multiple-input multiple-output (MIMO) system using superimposed training sequences are investigated. A new expression for estimation-error variance is derived. It is shown that the training sequences must be balanced and must have specific correlation properties. The latter are required only in a specific zone. Sequences that satisfy these criteria exist and are referred to as zero-correlation zone (ZCZ) solutions. Consequently, by using balanced ZCZ sequences, harmful direct current (DC) offset can be removed. Owing to their zero-cross correlation, interference from other transmitting antennas may be eliminated. Furthermore, a closed-form expression of the estimation-error variance can be obtained due to their impulse-like autocorrelation. To increase the number of antennas in the MIMO system, a new construction of ZCZ sequence set is proposed, in which all sequences are balanced","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":"119 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141351906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.26636/jtit.2024.2.1581
Mariusz Jurkiewicz
In this paper, we design and consider a new digital signature scheme with an evolving secret key, using random q-ary lattices as its domain. It is proved that, in addition to offering classic eu-cma security, the scheme is existentially forward unforgeable under an adaptive chosen message attack (fu-cma). We also prove that the secret keys are updated without revealing anything about any of the keys from the prior periods. Therefore, we design a polynomial-time reduction and use it to show that the ability to create a forgery leads to a feasible method of solving the well-known small integer solution (SIS) problem. Since the security of the scheme is based on computational hardness of a SIS problem, it turns out to be resistant to both classic and quantum methods. In addition, the scheme is based on the "Fiat-Shamir with aborts" approach that foils a transcript attack. As for the key-updating mechanism, it is based on selected properties of binary trees, with the number of leaves being the same as the number of time periods in the scheme. Forward security is gained under the assumption that one out of two hash functions is modeled as a random oracle.
{"title":"Quantum-Resistant Forward-Secure Digital Signature Scheme Based on q-ary Lattices","authors":"Mariusz Jurkiewicz","doi":"10.26636/jtit.2024.2.1581","DOIUrl":"https://doi.org/10.26636/jtit.2024.2.1581","url":null,"abstract":"In this paper, we design and consider a new digital signature scheme with an evolving secret key, using random q-ary lattices as its domain. It is proved that, in addition to offering classic eu-cma security, the scheme is existentially forward unforgeable under an adaptive chosen message attack (fu-cma). We also prove that the secret keys are updated without revealing anything about any of the keys from the prior periods. Therefore, we design a polynomial-time reduction and use it to show that the ability to create a forgery leads to a feasible method of solving the well-known small integer solution (SIS) problem. Since the security of the scheme is based on computational hardness of a SIS problem, it turns out to be resistant to both classic and quantum methods. In addition, the scheme is based on the \"Fiat-Shamir with aborts\" approach that foils a transcript attack. As for the key-updating mechanism, it is based on selected properties of binary trees, with the number of leaves being the same as the number of time periods in the scheme. Forward security is gained under the assumption that one out of two hash functions is modeled as a random oracle.","PeriodicalId":38425,"journal":{"name":"Journal of Telecommunications and Information Technology","volume":" 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141366095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-10DOI: 10.26636/jtit.2024.2.1588
Hasan k. Al Deen, Haider J. Abd
Rapid development of 5G networks encourages researchers to improve the radio-over-fiber (RoF) technique in order to reach 10 Gbps data transmission rates, to increase bandwidth and range, while reducing latency and implementation cost. This paper evaluates an analog radio-over-fiber (ARoF) technique that is compatible with long-distance communication systems. We demonstrate a long distance transmission of a 28 GHz 64 QAM signal via a single mode fiber (SMF) after modulating it with the use of two parallel Mach-Zehnder modulators, without any optical amplifiers. The results show that our prototype solution is capable of transferring data over distances of up to 140 km, via SMF, with a 10 Gbps data rate. The error vector magnitude (EVM) was found to be 7.709%. The proposed system offers exceptional capabilities in terms of supporting high bitrates, while ensuring that EVM remains within the 3GPP limits. Compared to other works, the proposed solution proves to be superior in terms of performance, making it an ideal choice for next generation long-haul communication systems.
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