Pub Date : 2022-09-01DOI: 10.3103/S0735272722100041
Y. Shapovalov, D. Bachyk, K. Detsyk, R. Romaniuk, Ivan Shapovalov
{"title":"Matrix D-Tree Method and Its Application for Symbolic Analysis of Linear Periodically Time-Variable Circuits in Frequency Domain","authors":"Y. Shapovalov, D. Bachyk, K. Detsyk, R. Romaniuk, Ivan Shapovalov","doi":"10.3103/S0735272722100041","DOIUrl":"https://doi.org/10.3103/S0735272722100041","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"485 - 496"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41926377","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 : 2022-08-11DOI: 10.3103/s0735272722010058
Reshmi Dhara, Taraknath Kundu, Mahato Sanoj
Abstract
Herein the modest, miniaturized circularly polarized hexa-band monopole antenna is anticipated for multipurpose application. Using microstrip line feeding the monopole antenna is created by utilizing triple strips, a slotted square loop containing square ground plane and two slotted stubs transversely over the diagonal line on the square loop. The optimization of antenna design parameters is furnished four wide impedance bandwidths (IBW). The measured quad IBW at S11 < –10 dB ranges 4.04–6.61, 7.70–7.81, 10.36–18.93, and 19.57–beyond 20 GHz (after 20 GHz, utilizing the available VNA can not be measured IBW). Whereas the simulated IBWs range 4.21–6.23, 8.55–8.85, 10.32–17.25, and 19.20–beyond 30 GHz. The simulated six axial-ratio bandwidths are of 380, 205, 360, 553, 907 and 290 MHz at the center frequencies fCP = 5.12, 10.78, 11.97, 14.63, 16.85, 28.58 GHz, correspondingly. The measured results match with the simulations by Ansys Electronics Desktop 2020R1 that are additionally confirmed in CST Microwave Studio. The antenna, presented in this paper, is compact, fabricated with the optimal dimension of 20×20×1.6 mm3, with 38.49% reduction in size. The proposed antenna can be appropriate for application in WLAN and some other wireless communication devices.
{"title":"Circularly Polarized Hexa-Band Planar Slot Antenna for WLAN and Wireless Communication Application","authors":"Reshmi Dhara, Taraknath Kundu, Mahato Sanoj","doi":"10.3103/s0735272722010058","DOIUrl":"https://doi.org/10.3103/s0735272722010058","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Herein the modest, miniaturized circularly polarized hexa-band monopole antenna is anticipated for multipurpose application. Using microstrip line feeding the monopole antenna is created by utilizing triple strips, a slotted square loop containing square ground plane and two slotted stubs transversely over the diagonal line on the square loop. The optimization of antenna design parameters is furnished four wide impedance bandwidths (IBW). The measured quad IBW at <i>S</i><sub>11</sub> < –10 dB ranges 4.04–6.61, 7.70–7.81, 10.36–18.93, and 19.57–beyond 20 GHz (after 20 GHz, utilizing the available VNA can not be measured IBW). Whereas the simulated IBWs range 4.21–6.23, 8.55–8.85, 10.32–17.25, and 19.20–beyond 30 GHz. The simulated six axial-ratio bandwidths are of 380, 205, 360, 553, 907 and 290 MHz at the center frequencies <i>f</i><sub>CP</sub> = 5.12, 10.78, 11.97, 14.63, 16.85, 28.58 GHz, correspondingly. The measured results match with the simulations by Ansys Electronics Desktop 2020R1 that are additionally confirmed in CST Microwave Studio. The antenna, presented in this paper, is compact, fabricated with the optimal dimension of 20×20×1.6 mm<sup>3</sup>, with 38.49% reduction in size. The proposed antenna can be appropriate for application in WLAN and some other wireless communication devices.</p>","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138527286","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 : 2022-08-11DOI: 10.3103/s0735272722010034
Laishram Mona Devi, Aheibam Dinamani Singh
Abstract
Optimization of spectral efficiency and quality of service can attain functional channel capacity for a wireless communication system. The channel capacity analysis over a fading channel is essential for realizing this goal. A recently developed model called Beaulieu–Xie fading channel model acquires the flavors of flexibility from Nakagami-m fading parameters and the non-centralized chi-distribution of the Rician fading model, which characterizes both line of sight and non-line of sight channels. The current work presents the channel capacity analysis with adaptive transmission techniques over Beaulieu–Xie fading channels. Various adaptive transmission schemes, such as channel inversion with a fixed-rate, truncated channel inversion with a fixed-rate, and optimal rate adaptation, are evaluated for the Beaulieu–Xie fading channel model. Additionally, the performance of the wireless system in terms of the bit error rate of coherent and non-coherent modulation is derived mathematically for this fading channel. Lastly, the mathematical expressions derived are verified with the help of Monte–Carlo simulation or standard results available in the literature.
{"title":"Channel Capacity Analysis of Various Adaptive Transmission Schemes and BER Performance at Beaulieu-Xie Fading","authors":"Laishram Mona Devi, Aheibam Dinamani Singh","doi":"10.3103/s0735272722010034","DOIUrl":"https://doi.org/10.3103/s0735272722010034","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Optimization of spectral efficiency and quality of service can attain functional channel capacity for a wireless communication system. The channel capacity analysis over a fading channel is essential for realizing this goal. A recently developed model called Beaulieu–Xie fading channel model acquires the flavors of flexibility from Nakagami-m fading parameters and the non-centralized chi-distribution of the Rician fading model, which characterizes both line of sight and non-line of sight channels. The current work presents the channel capacity analysis with adaptive transmission techniques over Beaulieu–Xie fading channels. Various adaptive transmission schemes, such as channel inversion with a fixed-rate, truncated channel inversion with a fixed-rate, and optimal rate adaptation, are evaluated for the Beaulieu–Xie fading channel model. Additionally, the performance of the wireless system in terms of the bit error rate of coherent and non-coherent modulation is derived mathematically for this fading channel. Lastly, the mathematical expressions derived are verified with the help of Monte–Carlo simulation or standard results available in the literature.</p>","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"23 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138527247","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 : 2022-08-11DOI: 10.3103/s0735272722010022
Anatoliy M. Bobreshov, Stanislav E. Neskorodov, Grigoriy K. Uskov
Abstract
This paper proposes a method for measuring the antenna radiation pattern (RP) with ultrashort pulses using the tower method at an open test site. It has been shown by experiments that the far-field boundary does not depend on the pulse duration if the bandwidth of exciting pulse exceeds that of antenna. When measuring in the interference zone, it is possible to separate the direct pulse and the pulse reflected from the underlying surface in time domain at any RP shape of the antennas used. The time window method makes it possible to exclude reflections from the ground and simulate the free space. The energy attenuation typical for the free space has been demonstrated when radiating at raised antennas and using a time window. In this case, there is no interference pattern typical for narrowband signals. It is shown that if the pulse reflected from the ground cannot be eliminated, the attenuation acquires the character of propagation along the underlying terrain. To demonstrate the use of the proposed technique, measurements of the horn antenna RP obtained by the pulse method are presented, and the results obtained are compared with the measurements in an anechoic chamber employing narrowband signals.
{"title":"Peculiarities of Time Domain Antenna Measurement Using Ultra-Short Pulses","authors":"Anatoliy M. Bobreshov, Stanislav E. Neskorodov, Grigoriy K. Uskov","doi":"10.3103/s0735272722010022","DOIUrl":"https://doi.org/10.3103/s0735272722010022","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This paper proposes a method for measuring the antenna radiation pattern (RP) with ultrashort pulses using the tower method at an open test site. It has been shown by experiments that the far-field boundary does not depend on the pulse duration if the bandwidth of exciting pulse exceeds that of antenna. When measuring in the interference zone, it is possible to separate the direct pulse and the pulse reflected from the underlying surface in time domain at any RP shape of the antennas used. The time window method makes it possible to exclude reflections from the ground and simulate the free space. The energy attenuation typical for the free space has been demonstrated when radiating at raised antennas and using a time window. In this case, there is no interference pattern typical for narrowband signals. It is shown that if the pulse reflected from the ground cannot be eliminated, the attenuation acquires the character of propagation along the underlying terrain. To demonstrate the use of the proposed technique, measurements of the horn antenna RP obtained by the pulse method are presented, and the results obtained are compared with the measurements in an anechoic chamber employing narrowband signals.</p>","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138543003","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 : 2022-08-01DOI: 10.3103/S0735272722070019
V. Riabukha, A. Semeniaka, Y. Katiushyn, D. Atamanskiy
{"title":"Protection of Coherent Pulse Radars against Combined Interferences. 4. Adaptive Systems of Space-Time Signal Coprocessing against Background of Combined Interference Based on Two-Dimensional ALF","authors":"V. Riabukha, A. Semeniaka, Y. Katiushyn, D. Atamanskiy","doi":"10.3103/S0735272722070019","DOIUrl":"https://doi.org/10.3103/S0735272722070019","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"400 - 410"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49585894","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 : 2022-08-01DOI: 10.3103/S0735272722080052
Vitaliy A. Balashov, Vasyl I. Oreshkov, I. Barba, Volodymyr Pedyash
{"title":"Speed Estimation of Broadband Access to Internet via xDSL Technology","authors":"Vitaliy A. Balashov, Vasyl I. Oreshkov, I. Barba, Volodymyr Pedyash","doi":"10.3103/S0735272722080052","DOIUrl":"https://doi.org/10.3103/S0735272722080052","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"439 - 445"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45341373","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 : 2022-08-01DOI: 10.3103/S0735272722080040
F. Dubrovka, S. Y. Fabirovskyi, Volodymyr-Myron Miskiv, I. Prudyus, V. H. Storozh
{"title":"Device to Monitor Radio Path Operation of Earth Station of Satellite System for Remote Sensing of the Earth","authors":"F. Dubrovka, S. Y. Fabirovskyi, Volodymyr-Myron Miskiv, I. Prudyus, V. H. Storozh","doi":"10.3103/S0735272722080040","DOIUrl":"https://doi.org/10.3103/S0735272722080040","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"433 - 438"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41554081","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 : 2022-08-01DOI: 10.3103/S0735272722090023
Oleksii Holubnychyi, M. Zaliskyi, O. Shcherbyna, O. Ivanets
{"title":"Presenting AR Model Error in Terms of Geman-McClure Function for Prediction of Processes in Telecommunications","authors":"Oleksii Holubnychyi, M. Zaliskyi, O. Shcherbyna, O. Ivanets","doi":"10.3103/S0735272722090023","DOIUrl":"https://doi.org/10.3103/S0735272722090023","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"420 - 432"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42317085","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 : 2022-08-01DOI: 10.3103/S0735272722090059
A. Badisa, B. Madhav, Kantamneni Srilatha, A. V. Chillarige, Vineel Battula, Ch. V. Garimella
{"title":"Design and Analysis of AMC Reflector Integrated Flexible and Compact Vehicular Antenna for Communication Application","authors":"A. Badisa, B. Madhav, Kantamneni Srilatha, A. V. Chillarige, Vineel Battula, Ch. V. Garimella","doi":"10.3103/S0735272722090059","DOIUrl":"https://doi.org/10.3103/S0735272722090059","url":null,"abstract":"","PeriodicalId":52470,"journal":{"name":"Radioelectronics and Communications Systems","volume":"65 1","pages":"411 - 419"},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48549142","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}
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