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2020 Baltic URSI Symposium (URSI)最新文献

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Time domain transmission sensor for soil moisture profile probe, selected technical aspects 时域传输传感器用于土壤湿度剖面探测，选用的技术方面
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254062
A. Wilczek, M. Kafarski, J. Majcher, A. Szypłowska, A. Lewandowski, W. Skierucha
{"title":"Time domain transmission sensor for soil moisture profile probe, selected technical aspects","authors":"A. Wilczek, M. Kafarski, J. Majcher, A. Szypłowska, A. Lewandowski, W. Skierucha","doi":"10.23919/URSI48707.2020.9254062","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254062","url":null,"abstract":"Time Domain Transmissometry (TDT) is one of the methods of electromagnetic metrology. This method, similarly to TDR, is mainly used to measure parameters of transmission lines and connectors. It is also suitable for determining the dielectric properties of materials from which the transmission line is built. It is known that water has high dielectric permittivity of about 80. This means that the volumetric water content of the soil has a decisive influence on its dielectric properties. A transmission line placed in the soil can be a detector of dielectric properties and then soil moisture. For these reasons, the TDR and TDT methods are commonly used to measure and monitor soil moisture. The selection of materials shape and construction of the transmission line are a constant challenge for the sensor designers. The probe should be watertight and materials used for construction should not absorb water. The paper presents selected research results concerning the design of soil moisture sensor and signal analysis to determine bulk dielectric permittivity.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129464873","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
Radio Distance Measurements Errors Estimation in an Indoor Environment 室内环境下无线电距离测量误差估计
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254051
Olga Blaszkiewicz, K. Cwalina, Alicja Olejniczak, Piotr Rajchowski, J. Sadowski
{"title":"Radio Distance Measurements Errors Estimation in an Indoor Environment","authors":"Olga Blaszkiewicz, K. Cwalina, Alicja Olejniczak, Piotr Rajchowski, J. Sadowski","doi":"10.23919/URSI48707.2020.9254051","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254051","url":null,"abstract":"In the article the analysis of the distance errors observed in the radio distance measurements (RDMs) is presented. Distance measurements were performed by using the DWM1000 modules, which are wireless transceiver modules, compliant with IEEE 802.15.4 UWB interface, which enable estimation of the object position in the real time. The data were collected during the static and dynamic measurement campaigns, which were carried out in an indoor environment for the (Line-Of-Sight) and the NLOS (Non-Line-Of-Sight) conditions. In the obtained results, a strong relation between the proximity of the nodes and the precision of the RDMs was shown. In a distance below 5 m the distance errors achieved values in the range from 11 cm to 40 cm. Additionally, the measurements results showed that the distance errors are LOS/NLOS condition dependent.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117024931","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
Evaluation of a Multi-Rod Probe Performance for Accurate Measurements of Soil Water Content 精确测量土壤含水量的多棒探针性能评价
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254059
J. Szerement, A. Woszczyk, A. Szypłowska, M. Kafarski, A. Lewandowski, A. Wilczek, W. Skierucha
{"title":"Evaluation of a Multi-Rod Probe Performance for Accurate Measurements of Soil Water Content","authors":"J. Szerement, A. Woszczyk, A. Szypłowska, M. Kafarski, A. Lewandowski, A. Wilczek, W. Skierucha","doi":"10.23919/URSI48707.2020.9254059","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254059","url":null,"abstract":"Dielectric sensors operating in time and frequency domain can be used to determine soil moisture content. There is still a need for developing new sensors for determination of soil water content, in order to further improve measurement accuracy, lower the price or adapt the equipment for special applications. For example, many of the existing soil moisture probes do not allow accurate measurement of dielectric properties in a small volume because of their construction. The paper presents the evaluation of a seven-rod probe for an accurate determination of soil water content in a small sample volume. Firstly, digital simulations for sensitivity zone of the tested probe were performed. Next, the prototype probe was tested for two soils with various texture and moisture content in the range from air dry to near saturation. The values of dielectric permittivity (frequency domain) and apparent dielectric permittivity (time domain) were calculated from the measured $S_{11}$ parameters. The obtained data was compared with the reference Topp's equation. It was concluded that the tested probe is able to measure soil moisture in a small volume (about 8 cm3) in the range of frequencies from 20 MHz to 200 MHz.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121045579","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
Reliability of Bio-Inspired Ultra-Dense Networks 仿生超密集网络的可靠性
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254015
Ł. Kułacz, Adrian Kliks
{"title":"Reliability of Bio-Inspired Ultra-Dense Networks","authors":"Ł. Kułacz, Adrian Kliks","doi":"10.23919/URSI48707.2020.9254015","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254015","url":null,"abstract":"In this work, the authors focused on assessing the reliability of the dense wireless network that draws inspiration from the human nervous system. The concept of such a network was created using the action of a glial cell, i.e. microglia, which is involved in the damaged nerve connections repair process. To assess reliability, the authors used the percolation theory, in particular the percolation threshold. This approach makes the results of simulations independent of the specific network topology. In the simulations carried out, the reliability level of the analyzed systems were also appointed.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123004683","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
The MBA($N,e,g$) Optical Switching Fabric MBA($N,e,g$)光交换结构
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254080
Remigiusz Rajewski
{"title":"The MBA($N,e,g$) Optical Switching Fabric","authors":"Remigiusz Rajewski","doi":"10.23919/URSI48707.2020.9254080","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254080","url":null,"abstract":"In this study, the new architecture of the optical switching fabric is proposed. The banyan-type switching networks, well known in switching theory, are composed of symmetrical $dtimes d$ switches. The new architecture considered in this study is built from mostly asymmetrical optical switching elements. It is shown that the new proposed structure requires a fewer number of passive as well as active optical elements than the banyan-type switching fabric of the same capacity and functionality. It also contains one stage fewer, which, from the optical switching point of view, is an important feature as well.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123138609","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
A Class E ZVS amplifier with basic matching circuits 带有基本匹配电路的E类ZVS放大器
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254031
M. Mikolajewski
{"title":"A Class E ZVS amplifier with basic matching circuits","authors":"M. Mikolajewski","doi":"10.23919/URSI48707.2020.9254031","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254031","url":null,"abstract":"In high-efficiency Class E amplifiers matching circuits are commonly used to transform usually constant load resistance to nominal or off-nominal resistance of the amplifier to ensure its ZVS operation. In some applications such as: wireless power transfer systems, plasma generators, dc-dc power converters as well as in some transmitters Class E amplifiers operate with load resistance or impedance varied in a wide range. This requires the matching circuit to transform the whole range of load resistance into the range of nominal and off-nominal resistance of the amplifier. The paper presents theoretical results for Class E ZVS amplifier with basic parallel π 1a and π2a matching circuits loaded with variable resistance. Conditions for ZVS operation of the amplifier with transistor duty cycle D=0.5 and the matching circuits loaded with any load resistance are discussed. Analytical expressions setting the boundaries for ZVS operation of the Class E amplifier with the analyzed matching circuits are given as well. Examples of normalized characteristics of output voltage and output power vs. load resistance for the amplifier are also presented. A design example for the Class E amplifier with π1a matching circuit able to operate with any load resistance is described and verified by simulation with LTSpice.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131174268","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
Pulsar observations using the POLFAR stations 使用POLFAR站进行脉冲星观测
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254061
K. Rożko, W. Lewandowski, J. Kijak, A. Krankowski, L. Blaszkiewicz, P. Flisek, K. Chyży, Bartosz Śmierciak
{"title":"Pulsar observations using the POLFAR stations","authors":"K. Rożko, W. Lewandowski, J. Kijak, A. Krankowski, L. Blaszkiewicz, P. Flisek, K. Chyży, Bartosz Śmierciak","doi":"10.23919/URSI48707.2020.9254061","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254061","url":null,"abstract":"In this paper we present the current status of the pulsar observations conduct by Polish LOFAR stations. In particular we show that the single LOFAR station can provide observations that are of sufficient quality to provide useful scientific data. These can help us to better understand some of the phenomena related to the pulsar emission and the influence of the interstellar matter. In this paper we focus on the mode switching phenomenon and a single pulses analysis conducted for pulsar B0329+54. We find that the same spectral features are visible in both emission modes, so we conclude that the polar cap emission mechanism is the same in separated modes.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114971305","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
Tamarin software – the tool for protocols verification security Tamarin软件-协议验证安全的工具
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254078
P. Remlein, Mikołaj Rogacki, Urszula Stachowiak
{"title":"Tamarin software – the tool for protocols verification security","authors":"P. Remlein, Mikołaj Rogacki, Urszula Stachowiak","doi":"10.23919/URSI48707.2020.9254078","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254078","url":null,"abstract":"In order to develop safety-reliable standards for IoT (Internet of Things) networks, appropriate tools for their verification are needed. Among them there is a group of tools based on automated symbolic analysis. Such a tool is Tamarin software. Its usage for creating formal proofs of security protocols correctness has been presented in this paper using the simple example of an exchange of messages with asynchronous encryption between two agents. This model can be used in sensor networks or IoT e.g. in TLS protocol to provide a mechanism for secure cryptographic key exchange.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123467609","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
Implementation Of The Innovative Radiolocalization System VCS-MLAT (Voice Communication System – Multilateration) 创新无线电定位系统VCS-MLAT(话音通信系统-多载波)的实施
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254075
S. Wiszniewski, Olga Blaszkiewicz, Alicja Olejniczak, J. Sadowski, J. Stefanski
{"title":"Implementation Of The Innovative Radiolocalization System VCS-MLAT (Voice Communication System – Multilateration)","authors":"S. Wiszniewski, Olga Blaszkiewicz, Alicja Olejniczak, J. Sadowski, J. Stefanski","doi":"10.23919/URSI48707.2020.9254075","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254075","url":null,"abstract":"In the article the concept of the radiolocalization subsystem of VHF communication for aviation VCS-MLAT (Voice Communication System - Multilateration) is presented. The distributed localization system will estimate the position of the aircrafts by the audio signals transmitted in aircraft band (118-136 MHz). This paper presents the measurements to check if voice airband communication can be used to estimate the position. Also main assumptions of the project and describes the structure and scheme of the localization modules are presented. At the end of the article the preparation for the final test in the real environment is concluded.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127729906","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
The use of Multiwall model for reference RSSI data preparation for indoor localization purposes 使用Multiwall模型为参考，RSSI数据准备用于室内定位目的
2020 Baltic URSI Symposium (URSI) Pub Date : 2020-10-05 DOI: 10.23919/URSI48707.2020.9254081
R. Kawȩcki, P. Korbel, S. Hausman
{"title":"The use of Multiwall model for reference RSSI data preparation for indoor localization purposes","authors":"R. Kawȩcki, P. Korbel, S. Hausman","doi":"10.23919/URSI48707.2020.9254081","DOIUrl":"https://doi.org/10.23919/URSI48707.2020.9254081","url":null,"abstract":"The article discusses the suitability of the multiwall radio wave propagation model for RSSI reference data preparation for fingerprinting-based indoor positioning applications. Localization system employs Bluetooth Low Energy beacons and mobile device to determine position of the user within the test area. The proposed system uses particle filter algorithm to estimate the user's current position from RSSI measurements and knowledge of reference electromagnetic field distribution computed for each beacon located in the building. The results of the comparison between the use of multiwall and ray tracing propagation models for indoor localization purposes has been shown. The relation between the time needed to prepare mentioned reference data was also demonstrated. Presented results show that for some cases it is possible to use less complex propagation models without losing sufficient localization accuracy but for the benefit of the time and complexity of calculations needed to prepare reference data for presented indoor localization application.","PeriodicalId":185201,"journal":{"name":"2020 Baltic URSI Symposium (URSI)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122779005","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: 2
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