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Propagation models in radio environment map design 无线电环境图设计中的传播模型
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406696
P. Gajewski
{"title":"Propagation models in radio environment map design","authors":"P. Gajewski","doi":"10.23919/URSI.2018.8406696","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406696","url":null,"abstract":"Radio Environment Map is a very important element of Dynamic Spectrum Management. It is used by spectrum regulators, wireless networks planners, operators, and Cognitive Radio users. REM is an information system, in which the electromagnetic field strength in every space location for whole usable spectrum is a main data to evaluate spectrum occupancy, and then for quality of signal reception. This data can be obtaining from expensive measurement campaigns, or/and as a prediction of signal sent by known radio transmitters. For such prediction, various propagation models can be used. Two main questions are discussed in this paper. The first one is an impact of used propagation models, and the second one is a digital map accuracy.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114767346","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: 7
A multiparameter examination system to assess self-regulatory mechanisms of the cardiovascular system under simulated hypergravity conditions 模拟超重力条件下心血管系统自我调节机制的多参数检测系统
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406698
E. Sobotnicka, A. Sobotnicki, Marek Czerw, G. Badura, M. Sobiech, M. Krej, L. Puchalska, Ł. Dziuda
{"title":"A multiparameter examination system to assess self-regulatory mechanisms of the cardiovascular system under simulated hypergravity conditions","authors":"E. Sobotnicka, A. Sobotnicki, Marek Czerw, G. Badura, M. Sobiech, M. Krej, L. Puchalska, Ł. Dziuda","doi":"10.23919/URSI.2018.8406698","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406698","url":null,"abstract":"An orthostatic test for assessing the condition of the cardiovascular system during a change of the body position, and the LBNP test consisting in applying negative pressure to the lower part of the body are deployed in clinical practice and in scientific research. Both tests conducted at a time increase the scope of change in the cardiovascular system. In order to carry out medical examinations of pilots and military aviation candidates under conditions of orthostatic stress and ischemic hypoxia, caused by lower body negative pressure, and in order to identify the occurring changes, specialist, multiparameter measurement modules had to be developed. The measurement modules referred to in the paper, used for synchronous recording of biomedical signals, were standardized in terms of control, transmission and power supply, which allowed for their integration in one device being part of the ORTO-LBNP cyberphysical system for examining pilots.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123153880","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
Performance of hybrid sensing method in multipath fading environment 多径衰落环境下混合感知方法的性能研究
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406691
Mateusz Kustra, K. Kosmowski, M. Suchanski
{"title":"Performance of hybrid sensing method in multipath fading environment","authors":"Mateusz Kustra, K. Kosmowski, M. Suchanski","doi":"10.23919/URSI.2018.8406691","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406691","url":null,"abstract":"The article presents an analysis of the efficiency of the hybrid sensing method for Rayleigh and m-Nakagami fading channels. The proposed hybrid detector (HD) takes advantage of the energy detection (ED) and a method based on the Covariance Absolute Value (CAV). The paper describes the model of the system and presents the simulation results for OFDM signal (Orthogonal Frequency Division Multiplexing) of WiMAX system. The simulation results were presented for the AWGN channel — the case currently considered in the literature, and then repeated for the environment with Rayleigh fading as well as mild and severe m-Nakagami fading.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130234391","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
Simple method of measuring photometric and radiometry parameters of power LEDs 测量功率led的光度和辐射参数的简单方法
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406710
K. Górecki, Przemysław Ptak
{"title":"Simple method of measuring photometric and radiometry parameters of power LEDs","authors":"K. Górecki, Przemysław Ptak","doi":"10.23919/URSI.2018.8406710","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406710","url":null,"abstract":"In the paper a new and easy to realize manner of measuring values of important photometric and radiometry parameters of power LEDs: the luminous flux and the power of optical radiation is proposed. The idea of measurements and the manner of its practical realization are presented. The usefulness of the proposed method is verified experimentally for the selected types of power LEDs. Factors restricting the accuracy of this method are discussed.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121095715","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: 4
Performance evaluation of D2D-based SFN for multicast service delivery in 5G networks 5G网络中基于d2d的多播业务分发SFN性能评估
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406702
S. Pizzi, F. Rinaldi, M. Fadda, G. Araniti
{"title":"Performance evaluation of D2D-based SFN for multicast service delivery in 5G networks","authors":"S. Pizzi, F. Rinaldi, M. Fadda, G. Araniti","doi":"10.23919/URSI.2018.8406702","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406702","url":null,"abstract":"The always increasing demand for group-oriented services challenges wireless network operators to efficiently handle the increased traffic load and the dissimilar channel quality experienced by users in the same multicast group. Long Term Evolution-Advanced (LTE-A) represents the most promising wireless system to support group-oriented services. A traditional approach for providing multicast services is the fair yet conservative Conventional Multicast Scheme (CMS) which serves all multicast members with the data rate supported by the receiver with the worst channel conditions. In order to address some of the limitations of the CMS approach, Device-to-Device (D2D) communications can be employed to reach users in the multicast group with poor channel conditions by means of one or more forwarding devices (FD). In this paper we analyze the performance of the D2D-enhanced CMS approach when considering all frame configurations foreseen by the LTE-A standard in order to draw some guidelines in case of video streaming transmission.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133599441","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
The MECHANEMA, or new method of numerical computation of electromagnetic field intensity at very low frequency range using electromechanical analogies MECHANEMA，或使用机电类比在极低频率范围内数值计算电磁场强度的新方法
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406692
T. Miś
{"title":"The MECHANEMA, or new method of numerical computation of electromagnetic field intensity at very low frequency range using electromechanical analogies","authors":"T. Miś","doi":"10.23919/URSI.2018.8406692","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406692","url":null,"abstract":"This paper presents the electric field intensity computation method using analogies between the VLF electric field intensity, obtained from experimental data, and field intensity of a mechanical wave. The method was employed in a Finite Element Method software platform for evaluation. Computations were carried out for different types of wave-guiding media and simulated the VLF environment close to the planet Mars. The results show that the method requires the implementation of a specific model of wave attenuation and may be further modified for different types of antenna radiation patterns.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133744175","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
Time delay estimation of cyclostationary signals on PCB using spectral correlation function 利用谱相关函数估计PCB上周期平稳信号的时延
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406726
E. Efimov, T. Shevgunov, Y. Kuznetsov
{"title":"Time delay estimation of cyclostationary signals on PCB using spectral correlation function","authors":"E. Efimov, T. Shevgunov, Y. Kuznetsov","doi":"10.23919/URSI.2018.8406726","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406726","url":null,"abstract":"This paper presents an approach to estimating delays of the cyclostationary signal propagating through tracks of the data bus of a printed circuit board (PCB). The signal path is described by the series of delays estimated using cyclostationary characteristics in the frequency domain. A brief overview of cyclostationarity phenomena is given alongside with the designed practical algorithm performing wideband estimation of the spectral correlation density of the signal. Delay estimations obtained with the proposed approach based on cyclic spectral correlation function are much closer to the values evaluated geometrically on planar scheme than delays calculated by means of well-known generalized cross-correlation algorithm (GCC). The proposed algorithm is verified by the results of experiments featuring FPGA board.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122761815","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: 20
Spatially consistent LOS/NLOS model for time-varying MIMO channels 时变MIMO信道的空间一致LOS/NLOS模型
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406737
R. Aleksiejūnas, A. Cesiul, K. Svirskas
{"title":"Spatially consistent LOS/NLOS model for time-varying MIMO channels","authors":"R. Aleksiejūnas, A. Cesiul, K. Svirskas","doi":"10.23919/URSI.2018.8406737","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406737","url":null,"abstract":"A cluster scattering MIMO channel model is proposed combining advantages of map-based models such as spatial consistency as well as stochastic properties of more general statistical models. The model is constructed by generating clusters based on LOS/NLOS visibility regions and generating stochastic MIMO channel coefficients according to temporal, spatial and spectral correlations between large and small scale fading parameters. Time and frequency sampled version of the channel coefficients are proposed which can be used as computationally effective discrete model for time-varying MIMO channels. The application of the model is illustrated by high-speed train scenario and Manhattan-like grid urban scenario.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"281 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127509323","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: 5
Deep neural networks for terrain recognition task 基于深度神经网络的地形识别
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406736
P. Kozłowski, K. Walas
{"title":"Deep neural networks for terrain recognition task","authors":"P. Kozłowski, K. Walas","doi":"10.23919/URSI.2018.8406736","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406736","url":null,"abstract":"This paper focuses on the problem of using artificial, deep neural networks in terrain recognition task based on data from vision sensor. Information about a terrain class is valuable for mobile robots, as it can improve their motion control algorithm performance through the use of information about surface properties. In this work RGB-D sensor was used for providing vision data, which comprise a depth map and infrared image in addition to the standard RGB data. Our own model of the artificial neural network is presented in this work. It was trained using the latest machine learning libraries. The results of this work demonstrate the performance of artificial neural networks in the terrain recognition task and give some hints how to improve classification in the future.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114159717","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: 8
SDR-based gateway for IoT and M2M applications 基于sdr的网关，用于物联网和M2M应用
2018 Baltic URSI Symposium (URSI) Pub Date : 2018-05-15 DOI: 10.23919/URSI.2018.8406706
Cristinel Gavrila, Csaba-Zoltan Kertesz, M. Alexandru, V. Popescu
{"title":"SDR-based gateway for IoT and M2M applications","authors":"Cristinel Gavrila, Csaba-Zoltan Kertesz, M. Alexandru, V. Popescu","doi":"10.23919/URSI.2018.8406706","DOIUrl":"https://doi.org/10.23919/URSI.2018.8406706","url":null,"abstract":"Affordable low-power, short-range terrestrial communications are the current enabler for Internet of Things (IoT) and Machine to Machine (M2M) applications. Their main drawback resides in the need of a gateway that enables them to communicate with the world. Satellite gateways have become in the recent years more affordable, but nevertheless, the combined equipment and access costs are still prohibitive for large scale deployments of satellite applications. The goal of this paper is to describe a fully functional prototype for a low-cost satellite gateway based on an embedded Software Defined Radio (SDR) platform. The developed prototype, implemented as a standalone RF platform, will be able to route data between the satellite and M2M/IoT applications, covering on the terrestrial side the most common shortrange wireless protocols and standards (802.11b/g/n, ZigBee, BLE, etc.). The satellite link will be assured by adapting typical lightweight uplink and downlink protocols, already implemented and tested. This paper is focused on the terrestrial side implementation and experimental results.","PeriodicalId":362184,"journal":{"name":"2018 Baltic URSI Symposium (URSI)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129298706","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: 5
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