2021 16th International Conference on Telecommunications (ConTEL)最新文献_第3页

3Time Jitter Influence on the Performance of PPM or PAM SIMO FSO Links over M-Turbulence Channels 时间抖动对m -湍流信道上PPM或PAM SIMO FSO链路性能的影响

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495994

P. J. Gripeos, H. Nistazakis, G. K. Varotsos, W. Gappmair, A. Tsigopoulos

{"title":"3Time Jitter Influence on the Performance of PPM or PAM SIMO FSO Links over M-Turbulence Channels","authors":"P. J. Gripeos, H. Nistazakis, G. K. Varotsos, W. Gappmair, A. Tsigopoulos","doi":"10.23919/ConTEL52528.2021.9495994","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495994","url":null,"abstract":"FSO communications has become more and more popular in the last decade due to its unprecedented benefits, which allows both low cost and high data rates. Nevertheless, the performance of such communication systems is unavoidably delimited due to many factors, primarily including the influence of scintillation and time jitter. The former effect is induced by atmospheric turbulence, which in turn depends on the current weather conditions of the atmospheric channel, causing rapid fluctuations in the received signal strength. At the receiver, the latter effect is due to the misdetection of optical pulses, causing further damage to the received signals, especially the high-rate ones, because of their short pulse time slot. However, both effects can be modeled by appropriate, already proposed, statistical distributions. Here, the turbulence effect is treated by the Málaga distribution, while the newly proposed generalized Gaussian distribution is employed for the time jitter influence. Also, the remarkable receiver’s diversity technique appears to be a promising solution to improve the performance of the FSO communications. In this work, new accurate mathematical expressions are derived for the estimation of the average BER of PPM or PAM FSO links with optimal combining diversity schemes at the receivers’ side. Additionally, the corresponding numerical results are presented for realistic system cases.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125950240","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

Influence of Pointing Errors at the Block Error Rate Performance of Strong Turbulent SIMO FSO Links 指向误差对强湍流SIMO FSO链路误码率性能的影响

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495991

N. A. Androutsos, H. Nistazakis, G. K. Varotsos, E. Roditi, E. Leitgeb

{"title":"Influence of Pointing Errors at the Block Error Rate Performance of Strong Turbulent SIMO FSO Links","authors":"N. A. Androutsos, H. Nistazakis, G. K. Varotsos, E. Roditi, E. Leitgeb","doi":"10.23919/ConTEL52528.2021.9495991","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495991","url":null,"abstract":"The last few years Free Space Optical (FSO) communication has attracted significant research and commercial interest because of the many advantages in comparison with other wireless methods used for point-to- point connections. The operation of these systems strongly depends on the atmospheric and others effects in the area between the transmitter and the receiver. Among them, atmospheric turbulence and misalignment are two of the most significant performance mitigation factors. There have been proposed several methods and techniques in the literature in order to set against the induced fading of these phenomena. It is widely accepted that one of the most effective one is the employment of receivers’ diversity. Motivated by this and by taking into account that the ultra-fast modern optical communication systems are using blocks of bits for the transmission and codes for the detection and/or correction of the erroneous bits, in this work, we investigate the combined impact of pointing errors and strong turbulence in the total average block error rate (ABLER) of FSO systems with receivers’ diversity. Novel analytical expressions are derived using accurate approximations while the corresponding numerical results for realistic Single-Input Multiple-Output (SIMO) FSO links are presented.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122914612","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

Design and Evaluation of an Accessible Mobile AR Application for Learning About Geometry 一个可访问的用于学习几何的移动AR应用程序的设计和评估

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495975

Ana Keselj, Iva Topolovac, Magdalena Kačić-Barišić, Mara Burum, Z. Car

{"title":"Design and Evaluation of an Accessible Mobile AR Application for Learning About Geometry","authors":"Ana Keselj, Iva Topolovac, Magdalena Kačić-Barišić, Mara Burum, Z. Car","doi":"10.23919/ConTEL52528.2021.9495975","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495975","url":null,"abstract":"Augmented reality is currently a very interesting technology due to the possibility of wide use on various affordable devices and at the same time high engagement and motivation potential for the user. These features are especially important in the educational field. As the number of developed prototypes in this area is rapidly increasing, only a limited part of them considers the implementation of accessibility, although accessibility is strongly required especially in educational solutions. The paper presents accessible mobile application for learning about geometry, specifically about geometry bodies, and this topic is often a challenge for children with learning difficulties. In addition to the accessibility option implemented, the actual design of the best-known universal design principles within the application is described, as accessibility relies heavily on them. The results of the application evaluation are presented, leading to the conclusion that this and future AR software solutions have great potential to be included in the curriculum as a tool for inclusive education, but only if the concept of accessibility is properly understood applied.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131608426","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: 3

Structured Ecological Cultivation with Autonomous Robots in Indoor Agriculture 自主机器人在室内农业中的结构化生态栽培

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495963

Marsela Polic, Antun Ivanovic, Bruno Maric, Barbara Arbanas, Jelena Tabak, M. Orsag

引用次数: 12

Keynote 1: Optical Wireless Communications – wireless without radios 主题演讲1:光无线通信——没有无线电的无线

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/contel52528.2021.9495965

引用次数: 0

Review on Low-Power Consumption Techniques for FPGA-based designs in IoT technology 物联网技术中基于fpga设计的低功耗技术综述

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495970

Marsida Ibro, G. Marinova

引用次数: 3

Random forest based classification of retroreflective foils for visible light sensing of an indoor moving object 基于随机森林的室内运动物体可见光感应后反射膜分类

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495983

A. Weiss, Kushal Madane, F. Wenzl, E. Leitgeb

{"title":"Random forest based classification of retroreflective foils for visible light sensing of an indoor moving object","authors":"A. Weiss, Kushal Madane, F. Wenzl, E. Leitgeb","doi":"10.23919/ConTEL52528.2021.9495983","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495983","url":null,"abstract":"Systems based on visible light sensing can relief some of the anticipated challenges arising from the predicted massive increase in connected Internet of Thing devices. For example, identification and speed determination of mobile objects can be achieved without the necessity to place actively powered devices or sensors on the object itself. Instead, the surfaces of the objects are simply equipped (coded) with sequences of differently colored foils, which affect the respective spectral compositions of reflected light. In this work, we present an innovative approach for classifying differently colored retroreflective foils in varying size configurations on a moving object by utilizing the supervised machine learning algorithm of random forest. For the respective experimental setup, consisting of a single light source (as a transmitter) and a single RGB sensitive photodiode (as a receiver for the reflected light from the coded mobile object), we can show that not only the task of identification, but also the task of determining the speed of the object can be achieved with 98.8 % accuracy. By utilizing a minimal feature set to create the random forest, the proposed approach requires only minimal computational effort for model generation and classification. The therewith-achieved results are directly compared to an algorithm based on the more complex and resource demanding method of Euclidian distances. The satisfying congruence discloses the applicability of the random forest model for such tasks, especially in scenarios with highly limited memory resources and limited available computational performance.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122296314","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

Leveraging Agri-food IoT Solutions to Connect Apiary Owners and Farmers 利用农业食品物联网解决方案连接养蜂场主和农民

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495980

M. Plóciennik, Raúl Palma, Szymon Mueller, Szymon Kupiński, Michal Blaszczak, Soumya Brahma, A. Radziuk, Adam Swiatkowski

{"title":"Leveraging Agri-food IoT Solutions to Connect Apiary Owners and Farmers","authors":"M. Plóciennik, Raúl Palma, Szymon Mueller, Szymon Kupiński, Michal Blaszczak, Soumya Brahma, A. Radziuk, Adam Swiatkowski","doi":"10.23919/ConTEL52528.2021.9495980","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495980","url":null,"abstract":"Agriculture as a whole consists of many sectors reliant on each other for proper functioning. The need for cross sector cooperation is especially important between apiary owners and farmers. Indeed, it provides benefits for both: increasing and diversifying access to appropriate flowering plants on one hand and providing means of increasing pollination of plants and in turn yield from fields on the other. On the contrary, lack of information may result in poisoning beehive families operating near regions where specific plant protection products have been used. However, even although IT and IoT solutions are increasingly prevalent in agri-food sectors, there is still a significant barrier in connecting various systems, exchanging data and helping users in facilitating modern solutions. In this paper we present a viable solution to this problem by leveraging DEMETER platform and show it’s usage to enable interoperability between commercial IoT beekeeper solution and emerging national farm management (eDWIN) and advisory tools.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126115760","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

Analyzing Web Security Features using Crawlers: Study of Croatian Web 使用爬虫分析Web安全特性:克罗地亚Web研究

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495966

Edi Stambuk, S. Groš, Marin Vukovic

引用次数: 2

A Self-Contained, Single-Chip Amperometric Measurement Platform for Biomedical Applications 用于生物医学应用的独立的单芯片安培测量平台

2021 16th International Conference on Telecommunications (ConTEL) Pub Date : 2021-06-30 DOI: 10.23919/ConTEL52528.2021.9495989

Markus Haberler, I. Siegl, Christian Zajc, Carolin Kollegger, C. Steffan, T. Maier, Loric Petruzzi, G. Mutinati, R. Hainberger, G. Holweg, M. Auer

{"title":"A Self-Contained, Single-Chip Amperometric Measurement Platform for Biomedical Applications","authors":"Markus Haberler, I. Siegl, Christian Zajc, Carolin Kollegger, C. Steffan, T. Maier, Loric Petruzzi, G. Mutinati, R. Hainberger, G. Holweg, M. Auer","doi":"10.23919/ConTEL52528.2021.9495989","DOIUrl":"https://doi.org/10.23919/ConTEL52528.2021.9495989","url":null,"abstract":"A self-contained RFID electrochemical measurement platform consisting of a single System-on-Chip (SoC) with interface capabilities to electrochemical sensors and energy storage elements is presented. A 13.56 MHz RFID interface enables two-way wireless communication and wireless power transfer. An on-chip circuit allows the SoC to harvest energy from the RF field into external energy storage elements. This functionality makes the proposed SoC the first implementation among similar systems to enable self-contained operation without the need for pre-charged energy storage elements. A sensor interface consisting of a DAC, a multi-working-electrode potentiostat and an ADC enables bidirectional current sensing. During the electrochemical analysis, the SoC consumes less than 83 µA from a 2.9-V supply. Experimental investigations on a prototype of the self-contained measurement platform suggest that the achieved accuracy is comparable to that of professional laboratory equipment, thus paving the way for the use of the platform in Point-of-Care (PoC) diagnostics.","PeriodicalId":269755,"journal":{"name":"2021 16th International Conference on Telecommunications (ConTEL)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123587632","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