Journal of Electrical Engineering-elektrotechnicky Casopis最新文献_第8页

Single channel convolutive blind source separation for LFM radar signals LFM雷达信号的单通道卷积盲源分离

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-12-01 DOI: 10.2478/jee-2022-0052

P. Xu, Yinjie Jia, Xinnian Guo

引用次数: 0

Progressive pattern orthogonal interleaver set for interleave division multiple access based, non orthogonal multiple access schemes: Beyond 5G perspective 用于基于交织分割多址的非正交多址方案的渐进模式正交交织器集：超越5G视角

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-12-01 DOI: 10.2478/jee-2022-0057

Shivani Dixit, Varun Shukla, M. Shukla

{"title":"Progressive pattern orthogonal interleaver set for interleave division multiple access based, non orthogonal multiple access schemes: Beyond 5G perspective","authors":"Shivani Dixit, Varun Shukla, M. Shukla","doi":"10.2478/jee-2022-0057","DOIUrl":"https://doi.org/10.2478/jee-2022-0057","url":null,"abstract":"Abstract This communication suggests an orthogonal interleaver set for interleave division multiple access (IDMA) based non orthogonal multiple access (NOMA) schemes from beyond 5G viewpoint to support enormous increase in user count. The method generates an orthogonal interleaver set by providing two mother interleavers as seed to generate other users’ interleaving patterns progressively. The key feature of the proposed scheme is that it reduces implementation complexity and memory requirement at the base station, while implementing iterative multiuser detection (MUD), which most of the interlaever designs suggested in literature do not consider. It provides additional security to the user data due to progressively changing mother interleavers’ pattern along with the conventional purpose of providing unique identity for individual users in the system. The proposed orthogonal interleaver set is tested through simulations under multiple IDMA system configurations. It has been observed that it preserves the bit error rate (BER) performance of the IDMA scheme along with the optimal implementation complexity and minimal information exchange requirement between base station and mobile station to share the interleaver design.","PeriodicalId":15661,"journal":{"name":"Journal of Electrical Engineering-elektrotechnicky Casopis","volume":"73 1","pages":"419 - 425"},"PeriodicalIF":0.8,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46952300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A fundamental approach: E-polarized electromagnetic wave diffraction by two dimensional arbitrary-shaped objects with impedance boundary condition 一种基本方法：具有阻抗边界条件的二维任意形状物体的E偏振电磁波衍射

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-12-01 DOI: 10.2478/jee-2022-0058

V. Tabatadze, K. Karaçuha, R. Zaridze, E. Veliyev, E. Karaçuha

{"title":"A fundamental approach: E-polarized electromagnetic wave diffraction by two dimensional arbitrary-shaped objects with impedance boundary condition","authors":"V. Tabatadze, K. Karaçuha, R. Zaridze, E. Veliyev, E. Karaçuha","doi":"10.2478/jee-2022-0058","DOIUrl":"https://doi.org/10.2478/jee-2022-0058","url":null,"abstract":"Abstract In the present study, a new methodology in computational electromagnetics is developed for two-dimensional arbitrarily-shaped objects with impedance boundary conditions. The proposed approach investigates the E-polarized electromagnetic diffraction by a two-dimensional object with the Leontovich boundary condition. The scattered electric and magnetic fields are expressed as the convolution integral of the corresponding Green’s function and the current induced on the obstacle surface. After obtaining integral equations by applying the boundary condition, the integral equations are solved as in the case of the method of auxiliary sources (MAS) which is a well-known method in computational electrodynamics. The results are compared with first, different methods such as the method of moments (MoM), orthogonal polynomials (OP), and second, different boundary conditions such as Dirichlet, Neumann, and fractional boundary conditions. Some results are also obtained for the different shape scatterers at some values of the surface impedance.","PeriodicalId":15661,"journal":{"name":"Journal of Electrical Engineering-elektrotechnicky Casopis","volume":"73 1","pages":"426 - 431"},"PeriodicalIF":0.8,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43222963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Lightweight ultra-wideband antenna array equipped with thin frequency selective surface for high-gain applications 轻型超宽带天线阵列配备薄频率选择表面，适用于高增益应用

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-12-01 DOI: 10.2478/jee-2022-0054

P. Prasad, S. Singh, Akhilesh Kumar

{"title":"Lightweight ultra-wideband antenna array equipped with thin frequency selective surface for high-gain applications","authors":"P. Prasad, S. Singh, Akhilesh Kumar","doi":"10.2478/jee-2022-0054","DOIUrl":"https://doi.org/10.2478/jee-2022-0054","url":null,"abstract":"Abstract This article begins with an explanation of a frequency selective surface, also known as an FSS, which is used to increase gain across a wide frequency range. The proposed unit design is a modified combination of circular and square elements with two cross dipoles and a T-type structure at the inner side. In the second step of the process, a single wideband antenna that covers the same range as FSS is designed and then analyzed in terms of its gain and radiation patterns. After that, an antenna array was built using the same solo structure in order to take advantage of the benefits that come with using an array system. The array is made up of elements that are CPW fed. A ground-backed T-shaped power divider network with additional shorting pins is used to supply power to the entire array. In the fourth step, an array of the FSS unit cell has been positioned beneath the UWB solo antenna and its array in order to investigate the possibility of improved gain and radiation pattern. The FSS equivalent lumped circuit model is presented here for validation purposes. It has been determined that the results of the experiment and the simulation are consistent with one another. In contrast to the structures that have been reported in the past, the newly developed model possesses a greater bandwidth, a higher gain, and a lower profile.","PeriodicalId":15661,"journal":{"name":"Journal of Electrical Engineering-elektrotechnicky Casopis","volume":"73 1","pages":"396 - 404"},"PeriodicalIF":0.8,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44526010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Novel MAC routing protocol for wireless sensor networks based on IEEE 802.11 ad hoc networks 基于IEEE 802.11自组织网络的无线传感器网络MAC路由协议

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0048

Woo-Yong Choi

引用次数: 2

Comparison of methods for determining speech voicing based on tests performed on paired consonants and continuous speech 基于对成对辅音和连续语音进行的测试确定语音发声方法的比较

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0049

Jan Malucha, M. Sigmund

引用次数: 0

Voltage THD limits for three- and single-phase multilevel inverters 三相和单相多电平逆变器的电压THD限制

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0050

A. Rehaoulia

引用次数: 0

Graph based anomaly detection in human action video sequence 基于图的人类动作视频序列异常检测

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0042

Pranoti Shrikant Kavimandan, R. Kapoor, Kalpana Yadav

{"title":"Graph based anomaly detection in human action video sequence","authors":"Pranoti Shrikant Kavimandan, R. Kapoor, Kalpana Yadav","doi":"10.2478/jee-2022-0042","DOIUrl":"https://doi.org/10.2478/jee-2022-0042","url":null,"abstract":"Abstract In our paper, we have proposed to use graphs to detect anomaly in human action video. Although the detection of anomaly is a widely researched topic, but very few researchers have detected anomaly in action video using graphs. in our proposed method we have represented the smaller section (sub-section) of our input video as a graph where vertices of the graph are the space time interest points in the sub-section video and the association between the space time interest points exists. Thus, graphs for each sub section are created to look for a repeated substructure. We believe most of the actions inherently are repeated in nature. Thus, we have tried to capture the repetitive sub-structure of the action represented as a graph and used this repetitive sub-structure to compress the graph. If the compressed graph has few elements that have not been compressed, we suspect them as anomaly. But the threshold value takes care not to make the proposed method very much sensitive towards the few uncompressed elements. Our proposed method has been implemented on locally created “extended KTH” and “extended Weizmann” datasets with good accuracy score. The proposed method can also be extended for few more applications such as training athletes and taking elderly care.","PeriodicalId":15661,"journal":{"name":"Journal of Electrical Engineering-elektrotechnicky Casopis","volume":"73 1","pages":"318 - 324"},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45364417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of metal layers on chemical vapor deposition of diamond films 金属层对金刚石薄膜化学气相沉积的影响

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0047

T. Izsák, G. Vanko, O. Babčenko, B. Zat’ko, A. Kromka

{"title":"Effects of metal layers on chemical vapor deposition of diamond films","authors":"T. Izsák, G. Vanko, O. Babčenko, B. Zat’ko, A. Kromka","doi":"10.2478/jee-2022-0047","DOIUrl":"https://doi.org/10.2478/jee-2022-0047","url":null,"abstract":"Abstract Diamond is recognized as one of the most promising wide bandgap materials for advanced electronic applications. However, for many practical uses, hybrid diamond growth combining metal electrodes is often demanded. Here, we present the influence of thin metal (Ni, Ir, Au) layers on diamond growth by microwave plasma chemical vapor deposition (MWCVD) employing two different concepts. In the first concept, a flat substrate (GaN) was initially coated with a thin metal layer, then exposed to the diamond MWCVD process. In the second concept, the thin diamond film was firstly formed, then it was overcoated with the metal layer and finally, once again exposed to the diamond MWCVD. It should be mentioned that this concept allows the implementation of the metal electrode into the diamond bulk. It was confirmed that the Ni thin films (15 nm) hinder the formation of diamond crystals resulting in the formation of an amorphous carbon layer. Contrary to this finding, the Ir layer resulted in a successful overgrowth by the fully closed diamond film. However, by employing concept 2 (ie hybrid diamond/metal/diamond composite), the thin Ir layer was found to be unstable and transferred into the isolated clusters, which were overgrown by the diamond film. Using the Au/Ir (30/15 nm) bilayer system stabilized the metallization and no diamond growth was observed on the metal layer.","PeriodicalId":15661,"journal":{"name":"Journal of Electrical Engineering-elektrotechnicky Casopis","volume":"73 1","pages":"350 - 354"},"PeriodicalIF":0.8,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47589681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal design and low noise realization of digital differentiator 数字微分器的优化设计与低噪声实现

IF 0.8 4区工程技术

Journal of Electrical Engineering-elektrotechnicky Casopis Pub Date : 2022-09-01 DOI: 10.2478/jee-2022-0044

Om Prakash Goswami, Aasheesh Shukla, Manish Kumar

引用次数: 1