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On the Quasi-Moment-Method as a Rain Attenuation Prediction Modeling Algorithm 论作为雨衰减预测建模算法的准瞬间法
Journal of Communication and Information Systems Pub Date : 2024-02-08 DOI: 10.14209/jcis.2023.22
Sulaiman Adeniyi Adekola, A. Ayorinde, H. Muhammed, F. Okewole, A. Ike Mowete
{"title":"On the Quasi-Moment-Method as a Rain Attenuation Prediction Modeling Algorithm","authors":"Sulaiman Adeniyi Adekola, A. Ayorinde, H. Muhammed, F. Okewole, A. Ike Mowete","doi":"10.14209/jcis.2023.22","DOIUrl":"https://doi.org/10.14209/jcis.2023.22","url":null,"abstract":"A computationally inexpensive, analytically simple, and remarkably efficient rain attenuation prediction algorithm is presented in this paper. The algorithm, here referred to as the Quasi Moment-Method (QMM), has only two main requirements for its implementation. First, rain attenuation measurement data (terrestrial or slant path) for the site of interest must be available; and second, a model, known to have predicted attenuation for any site to a reasonable level of accuracy (base model), and whose analytical format can be expressed as a linear combination of its parameters, is also required. An important novelty introduced by the QMM algorithm is a normalization scheme, through which a modelling difficulty concerning exceedance probabilities outside a 0.01 to 1.00 range, is eliminated. Model validation and performance evaluation using a comprehensive set of data available from the literature clearly demonstrated that the QMM models consistently improved base model performance by more than 90%; and outperformed all published ‘best fit’ models with which they were compared.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139851969","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}
引用次数: 0
On the Quasi-Moment-Method as a Rain Attenuation Prediction Modeling Algorithm 论作为雨衰减预测建模算法的准瞬间法
Journal of Communication and Information Systems Pub Date : 2024-02-08 DOI: 10.14209/jcis.2023.22
Sulaiman Adeniyi Adekola, A. Ayorinde, H. Muhammed, F. Okewole, A. Ike Mowete
{"title":"On the Quasi-Moment-Method as a Rain Attenuation Prediction Modeling Algorithm","authors":"Sulaiman Adeniyi Adekola, A. Ayorinde, H. Muhammed, F. Okewole, A. Ike Mowete","doi":"10.14209/jcis.2023.22","DOIUrl":"https://doi.org/10.14209/jcis.2023.22","url":null,"abstract":"A computationally inexpensive, analytically simple, and remarkably efficient rain attenuation prediction algorithm is presented in this paper. The algorithm, here referred to as the Quasi Moment-Method (QMM), has only two main requirements for its implementation. First, rain attenuation measurement data (terrestrial or slant path) for the site of interest must be available; and second, a model, known to have predicted attenuation for any site to a reasonable level of accuracy (base model), and whose analytical format can be expressed as a linear combination of its parameters, is also required. An important novelty introduced by the QMM algorithm is a normalization scheme, through which a modelling difficulty concerning exceedance probabilities outside a 0.01 to 1.00 range, is eliminated. Model validation and performance evaluation using a comprehensive set of data available from the literature clearly demonstrated that the QMM models consistently improved base model performance by more than 90%; and outperformed all published ‘best fit’ models with which they were compared.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":" 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139791963","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}
引用次数: 0
2D FDTD Electromagnetic Simulation of an Ultracompact All Optical Logic Gate Based on 2D Photonic Crystal for Ultrafast Applications 基于面向超快应用的二维光子晶体的超小型全光逻辑门的二维 FDTD 电磁模拟
Journal of Communication and Information Systems Pub Date : 2024-02-02 DOI: 10.14209/jcis.2024.4
Léo César de Almeida, F. D. de Sousa, Waldomiro Paschoal Jr., Marcos Costa
{"title":"2D FDTD Electromagnetic Simulation of an Ultracompact All Optical Logic Gate Based on 2D Photonic Crystal for Ultrafast Applications","authors":"Léo César de Almeida, F. D. de Sousa, Waldomiro Paschoal Jr., Marcos Costa","doi":"10.14209/jcis.2024.4","DOIUrl":"https://doi.org/10.14209/jcis.2024.4","url":null,"abstract":"In this paper, the concept of photonic crystals (PhCs) is fundamental to designing and simulating an all-optical logic gate device. We proposed an all-optical switch composed of two-dimensional (2D) photonic crystal waveguides with a central photonic crystal ring resonator (PCRR). The new all-optical NAND logic gate device comprises two linear waveguides coupled to each other through a single compact PCRR. The plane wave expansion (PWE) and finite-difference time-domain (FDTD) methods are applied to simulate the properties of the system. The structure is implemented on the operational wavelength of 1700 nm on an air wafer of only 12 μm × 12 μm. Indeed, the simulation results show that the proposed all-optical NAND gate is a strong candidate for ultrafast photonic integrated circuits (PICs) for applications in optical communications, being advantageous with high transmitting power, with simple design, and without the use of optical amplifiers and nonlinear materials.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"42 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139868630","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}
引用次数: 0
2D FDTD Electromagnetic Simulation of an Ultracompact All Optical Logic Gate Based on 2D Photonic Crystal for Ultrafast Applications 基于面向超快应用的二维光子晶体的超小型全光逻辑门的二维 FDTD 电磁模拟
Journal of Communication and Information Systems Pub Date : 2024-02-02 DOI: 10.14209/jcis.2024.4
Léo César de Almeida, F. D. de Sousa, Waldomiro Paschoal Jr., Marcos Costa
{"title":"2D FDTD Electromagnetic Simulation of an Ultracompact All Optical Logic Gate Based on 2D Photonic Crystal for Ultrafast Applications","authors":"Léo César de Almeida, F. D. de Sousa, Waldomiro Paschoal Jr., Marcos Costa","doi":"10.14209/jcis.2024.4","DOIUrl":"https://doi.org/10.14209/jcis.2024.4","url":null,"abstract":"In this paper, the concept of photonic crystals (PhCs) is fundamental to designing and simulating an all-optical logic gate device. We proposed an all-optical switch composed of two-dimensional (2D) photonic crystal waveguides with a central photonic crystal ring resonator (PCRR). The new all-optical NAND logic gate device comprises two linear waveguides coupled to each other through a single compact PCRR. The plane wave expansion (PWE) and finite-difference time-domain (FDTD) methods are applied to simulate the properties of the system. The structure is implemented on the operational wavelength of 1700 nm on an air wafer of only 12 μm × 12 μm. Indeed, the simulation results show that the proposed all-optical NAND gate is a strong candidate for ultrafast photonic integrated circuits (PICs) for applications in optical communications, being advantageous with high transmitting power, with simple design, and without the use of optical amplifiers and nonlinear materials.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"7 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139808794","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}
引用次数: 0
Embedded-SIM (E-SIM) an Overview in Latin America: Implementation, Availability, Advantages and Disadvantages 拉丁美洲嵌入式 SIM 卡（E-SIM）概览：实施、可用性、优势和劣势
Journal of Communication and Information Systems Pub Date : 2024-02-01 DOI: 10.14209/jcis.2024.5
Hyggor da Silva Medeiros, Leandro de Souza Bezerra, Fernando Trinidad España, Jefferson Tiago Santos de Oliveira
{"title":"Embedded-SIM (E-SIM) an Overview in Latin America: Implementation, Availability, Advantages and Disadvantages","authors":"Hyggor da Silva Medeiros, Leandro de Souza Bezerra, Fernando Trinidad España, Jefferson Tiago Santos de Oliveira","doi":"10.14209/jcis.2024.5","DOIUrl":"https://doi.org/10.14209/jcis.2024.5","url":null,"abstract":"Search new forms for data management and security is a continuous tendency for mobile operators. Proof of this is the trend of the latest technology related to the Embedded Subscriber Identity Module or Embedded-SIM (E-SIM). Recently there was an increase in the number of devices that offer this technology as a security element for the access to the network, however, it is clear the lack of consistent information for the implementation of this technology within Latin America. This research presents a current overview about the evolution of the embedded subscriber identity module, aiming to present the general characteristics that are part of the network, evaluate the current status of implementation and adoption with Latin America carriers, showing the obstacles in the process of acceptance of new technology by users as well as the advantages, disadvantages of E-SIM in relation to the traditional SIM Card. The investigation was carried out through documentary surveys and field research, the data was collected to demonstrate the current perspective of the implementation of E-SIM and adoption by customers and network operators in Latin America. The observed results showed that the adoption of E-SIM in Latin America has been increasing, it was observed that most countries have at least one carrier that makes available and offers this service. Regarding the advantages and disadvantages, evidence has been observed place E-SIM like a better technology than a SIM Card.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"187 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139892242","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}
引用次数: 0
Embedded-SIM (E-SIM) an Overview in Latin America: Implementation, Availability, Advantages and Disadvantages 拉丁美洲嵌入式 SIM 卡（E-SIM）概览：实施、可用性、优势和劣势
Journal of Communication and Information Systems Pub Date : 2024-02-01 DOI: 10.14209/jcis.2024.5
Hyggor da Silva Medeiros, Leandro de Souza Bezerra, Fernando Trinidad España, Jefferson Tiago Santos de Oliveira
{"title":"Embedded-SIM (E-SIM) an Overview in Latin America: Implementation, Availability, Advantages and Disadvantages","authors":"Hyggor da Silva Medeiros, Leandro de Souza Bezerra, Fernando Trinidad España, Jefferson Tiago Santos de Oliveira","doi":"10.14209/jcis.2024.5","DOIUrl":"https://doi.org/10.14209/jcis.2024.5","url":null,"abstract":"Search new forms for data management and security is a continuous tendency for mobile operators. Proof of this is the trend of the latest technology related to the Embedded Subscriber Identity Module or Embedded-SIM (E-SIM). Recently there was an increase in the number of devices that offer this technology as a security element for the access to the network, however, it is clear the lack of consistent information for the implementation of this technology within Latin America. This research presents a current overview about the evolution of the embedded subscriber identity module, aiming to present the general characteristics that are part of the network, evaluate the current status of implementation and adoption with Latin America carriers, showing the obstacles in the process of acceptance of new technology by users as well as the advantages, disadvantages of E-SIM in relation to the traditional SIM Card. The investigation was carried out through documentary surveys and field research, the data was collected to demonstrate the current perspective of the implementation of E-SIM and adoption by customers and network operators in Latin America. The observed results showed that the adoption of E-SIM in Latin America has been increasing, it was observed that most countries have at least one carrier that makes available and offers this service. Regarding the advantages and disadvantages, evidence has been observed place E-SIM like a better technology than a SIM Card.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"85 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139832123","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}
引用次数: 0
Exploiting Simultaneous Multi-Brand Operation to Improve 6TiSCH Reliability and Latency 利用同时多品牌操作提高6TiSCH可靠性和延迟
Journal of Communication and Information Systems Pub Date : 2023-10-31 DOI: 10.14209/jcis.2023.18
Marcus Vinicius Bunn, Samuel Baraldi Mafra, Richard Demo Souza, Guilherme Luiz Moritz
{"title":"Exploiting Simultaneous Multi-Brand Operation to Improve 6TiSCH Reliability and Latency","authors":"Marcus Vinicius Bunn, Samuel Baraldi Mafra, Richard Demo Souza, Guilherme Luiz Moritz","doi":"10.14209/jcis.2023.18","DOIUrl":"https://doi.org/10.14209/jcis.2023.18","url":null,"abstract":"The Internet Engineering Task Force (IETF) group \"IPv6 over the TSCH mode of IEEE 802.15.4e\" (6TiSCH) introduced a protocol, utilizing Time-Slotted Channel Hopping (TSCH) from IEEE802.15.4e due to its high reliability and time-deterministic characteristic, that achieves industrial performance requirements while offering the benefits of IP connectivity. This work proposes the addition of a second radio interface in 6TiSCH devices to operate a parallel network in sub-GHz, introducing transmit diversity while benefiting from decreased path-loss and reduced interference. Simulation results show an improvement of 20% in Packet Delivery Ratio (PDR) and close to 31% in latency in different 6TiSCH networks scenarios.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135871885","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}
引用次数: 0
Channel Analysis for 3.5 GHz Frequency in Airport 3.5 GHz机场信道分析
Journal of Communication and Information Systems Pub Date : 2023-08-01 DOI: 10.14209/jcis.2023.13
Alex Macedo, Thiago Costa, Edemir de Matos, Leslye Castro Eras, J. D. De Araújo, P.V. Gonzalez Castellanos, Fabricio Barros
{"title":"Channel Analysis for 3.5 GHz Frequency in Airport","authors":"Alex Macedo, Thiago Costa, Edemir de Matos, Leslye Castro Eras, J. D. De Araújo, P.V. Gonzalez Castellanos, Fabricio Barros","doi":"10.14209/jcis.2023.13","DOIUrl":"https://doi.org/10.14209/jcis.2023.13","url":null,"abstract":"This letter presents an analysis of the radio propagation channel based on measurements at the 3.5 GHz frequency. The measurement campaigns were carried out inside the Valde-Cans airport using line-of-sight (LOS) transmissions. First, the channel small-scale dispersion parameters were extracted through channel probing and the results are similar to those obtained by ITU-R P.1238 for the bands below 15 GHz considering commercial indoor environments as well as for those using the 3.5 GHz band in outdoor environments utilizing WiMax OFDM-256 signals. Then, the floating-intercept (FI) and close-in (CI) models are applied and analyzed to evaluate the received signal behavior for co-polarized and cross polarized antennas. The results show that the CI path loss exponent values are close to the free space propagation loss model, while the FI model provides a lower root mean square error (RMSE) to the measured data. The results show that the FI and CI models are suitable for large-scale indoor propagation loss modeling for 5G networks with a frequency of 3.5 GHz.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126096703","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}
引用次数: 1
Does Hexagonal Lattice Improve the Performance of QAM-FBMC? 六边形晶格能提高QAM-FBMC的性能吗?
Journal of Communication and Information Systems Pub Date : 2023-05-01 DOI: 10.14209/jcis.2023.8
Iandra Galdino, R. Zakaria, D. Le Ruyet, M. D. De Campos
{"title":"Does Hexagonal Lattice Improve the Performance of QAM-FBMC?","authors":"Iandra Galdino, R. Zakaria, D. Le Ruyet, M. D. De Campos","doi":"10.14209/jcis.2023.8","DOIUrl":"https://doi.org/10.14209/jcis.2023.8","url":null,"abstract":"Quadrature amplitude modulation filter-bank multicarrier (QAM-FBMC) is a promising technology for future wireless communications systems. However, the intrinsic interference observed at the receiver can be a source of problems. In order to overcome the intrinsic interference, in this paper, we propose a QAM-FBMC system with hexagonal lattice structure, which we call HQAM-FBMC. We also propose a new prototype filter design, specifically for the HQAM-FBMC system, based on discrete prolate spheroidal sequences (DPSS). The proposed filters have also been optimized to reduce the intrinsic interference of the system. Moreover, we compare and analyze the performance of the QAM-FBMC system with the performance of the proposed HQAM-FBMC using the optimized filter through the bit error rate (BER).","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114212861","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}
引用次数: 0
Ultra-Wideband, Directive and Circular Polarization Lens Antennas for Future Communications 面向未来通信的超宽带、定向和圆偏振透镜天线
Journal of Communication and Information Systems Pub Date : 2023-04-01 DOI: 10.14209/jcis.2023.7
{"title":"Ultra-Wideband, Directive and Circular Polarization Lens Antennas for Future Communications","authors":"","doi":"10.14209/jcis.2023.7","DOIUrl":"https://doi.org/10.14209/jcis.2023.7","url":null,"abstract":"This paper presents a potential featured antenna for future wireless communication networks. The use of a hemispherical dielectric lens combined with an equiangular spiral printed antenna is proposed to achieve a radiator design with high gain, operating in a frequency range between 8.0 GHz to 15.6 GHz in circular polarization. Numerical analyses performed by the ANSYS HFSS software, and experimental measurements validated the functionality of the proposed structure, reaching gains greater than 14.2 dBi.","PeriodicalId":312271,"journal":{"name":"Journal of Communication and Information Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117156311","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}
引用次数: 0
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