2022 International Symposium ELMAR最新文献

3D Content Viewer Environment for Distant Learning 远程学习的3D内容查看器环境

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899801

Simon Tibenský, Vivek Dwivedi, Gregor Rozinaj

引用次数: 1

Software-Defined LEO Satellite Networks with Focus on Multipath TCP Data Throughput 关注多路径TCP数据吞吐量的软件定义LEO卫星网络

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899820

P. Trúchly, M. Laš, Rastislav Bencel, Hana Kuntova

{"title":"Software-Defined LEO Satellite Networks with Focus on Multipath TCP Data Throughput","authors":"P. Trúchly, M. Laš, Rastislav Bencel, Hana Kuntova","doi":"10.1109/ELMAR55880.2022.9899820","DOIUrl":"https://doi.org/10.1109/ELMAR55880.2022.9899820","url":null,"abstract":"Satellite systems are a suitable solution for communications in areas with difficult access or areas not suitable for cable connections (desert, sea, poles). Modern global satellite systems, which are based on constellations of interconnected satellites (e.g. Starlink), are currently being built. They provide multiple paths between sources and destinations and ground devices could communicate with more satellites at the same time. This capability can be efficiently utilized by Multipath TCP that is able to split application data session into multiple MPTCP flows so they can achieve higher data throughput and reliability. In order to meet these goals, efficient optimal path-finding algorithms are necessary. Software-defined networks deployed in such satellite systems can provide real-time and flexible centralized control of the entire network including optimal path discovery. In this paper, we proposed a software-defined satellite network architecture with efficient MPTCP traffic transmission and balancing. We implemented three optimal path calculation and selection algorithms within this architecture to evaluate the final system performance.","PeriodicalId":115888,"journal":{"name":"2022 International Symposium ELMAR","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129072196","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

Significance of Early Warning System in the Water Ballast Management 预警系统在压载水管理中的意义

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899822

R. Ivce, A. Zekić, Mohović Đani, Antonio Blažina

引用次数: 0

Content Distribution in Private Networks 私有网络中的内容分发

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899785

John Nemcik, P. Kanuch, I. Kotuliak

引用次数: 0

Semantic Metadata for Image Files 图像文件的语义元数据

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899778

Neven Pičuljan, Zeljka Car

引用次数: 0

An E Band Wideband Superheterodyne Receiver Front-End Using Large-Dynamic-Range Automatic-Gain-Control Loop 采用大动态范围自动增益控制回路的E波段宽带超外差接收机前端

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899816

Awei Zhang, Jin-ping Xu, Chenkai He, Chunmin Wang, Qiukai Ju

{"title":"An E Band Wideband Superheterodyne Receiver Front-End Using Large-Dynamic-Range Automatic-Gain-Control Loop","authors":"Awei Zhang, Jin-ping Xu, Chenkai He, Chunmin Wang, Qiukai Ju","doi":"10.1109/ELMAR55880.2022.9899816","DOIUrl":"https://doi.org/10.1109/ELMAR55880.2022.9899816","url":null,"abstract":"An E-band wideband receiver front-end with stable output power over large input dynamic range is presented in this paper. It adopts a double-conversion superheterodyne structure combined with automatic gain control (AGC) technology to realize the wideband signals reception and dynamic range compression. An E-band mixer is designed based on Schottky diodes which features advantages in broadband and low cost, compared with commercially available chips. The AGC loop in the intermediate frequency circuit utilizes 3 voltage variable attenuators to provide a 78 dB continuously variable gain and uses a logarithmic detector to form an analog feedback loop, which exhibits a stable and high-flatness output power over 73 dB input dynamic range. The measured input dynamic range of the receiver front-end is −55dBm to +5 dBm with output power fluctuation better than ±1 dB, in the operating frequency range of 66.5~75.5 GHz. The power flatness of the output frequency response within the 500 MHz channel bandwidth is better than ±0.5 dB. Besides, the harmonic suppression and spur suppression of the IF output signal is better than 52 dBc and 75 dBc, respectively.","PeriodicalId":115888,"journal":{"name":"2022 International Symposium ELMAR","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117162074","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 of an E-band Predistortion Linearizer Based on Reflective Schottky Diodes 基于反射肖特基二极管的e波段预失真线性器设计

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899713

Yuwei Zhang, Le Ren, Peiwen Yu, Jin-ping Xu

{"title":"Design of an E-band Predistortion Linearizer Based on Reflective Schottky Diodes","authors":"Yuwei Zhang, Le Ren, Peiwen Yu, Jin-ping Xu","doi":"10.1109/ELMAR55880.2022.9899713","DOIUrl":"https://doi.org/10.1109/ELMAR55880.2022.9899713","url":null,"abstract":"An E-band predistortion linearizer based on reflective Schottky diodes is reported in this paper. It consists of a broadband 3 dB waveguide coupler, two symmetrical reflective circuits based on two pairs of Schottky diodes and the necessary DC bias circuits. The two reflective circuits are implemented at the through port and the coupling port of the waveguide coupler. The two reflected signals from the grounded Schottky diodes are combined at the isolation port of the coupler, which serves as the output signal of the linearizer. Magnitude and phase expansion are observed by varying the applied voltage to one of the diode pairs in the range of 0~5 V while the voltage applied to the other diode pair is fixed to be −3 V. Tested results reveal that this predistortion linearizer has a maximum phase expansion of 25 degrees and 6.5 dB magnitude expansion at 74 GHz. By adjusting the applied voltage to both of the two diode pairs to be in the range of 0.51~0.76 V, maximum 25 degrees phase compression and 2.5 dB magnitude expansion at 74 GHz have been achieved. The proposed linearizer can be applied to the linearization of both travelling-wave tube amplifiers (TWTAs) and solid-state power amplifiers (SSPAs).","PeriodicalId":115888,"journal":{"name":"2022 International Symposium ELMAR","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117171523","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

Identification of malicious behaviour in content delivery network environment 内容分发网络环境中恶意行为的识别

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899715

Lukas Anda, Richard Rostecky, M. Galinski

引用次数: 1

Blind Channel Identification with Fractional Fourier Transform and Machine Learning 基于分数阶傅里叶变换和机器学习的盲信道识别

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899782

G. Baldini, Fausto Bonavitacola

{"title":"Blind Channel Identification with Fractional Fourier Transform and Machine Learning","authors":"G. Baldini, Fausto Bonavitacola","doi":"10.1109/ELMAR55880.2022.9899782","DOIUrl":"https://doi.org/10.1109/ELMAR55880.2022.9899782","url":null,"abstract":"Blind channel identification is an important function in wireless communication systems. This paper proposes a new approach based on the application of the Fractional Fourier Transform (FRFT) in combination with machine learning and statistical features commonly adopted in the literature. The approach is evaluated against a data set created by the authors using laboratory equipment including a signal generator, channel emulator, and a spectrum analyzer. Signals with six different fading models including the baseline case of absence of fading are generated for the evaluation of the proposed approach. The impact of white gaussian noise is also evaluated. The results show that the application of statistical features in combination with FRFT significantly outperforms the application of statistical features in the time domain as commonly adopted in the literature. The impact of the rotation angle α in the definition of FRFT is also assessed in combination with a Sequential Forward Feature Selection (SFFS) algorithm to decrease the number of features in the application of the machine learning algorithm. The results of the (SFFS) algorithm are coherent with the findings in the literature on the choice of the optimal statistical features.","PeriodicalId":115888,"journal":{"name":"2022 International Symposium ELMAR","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133732082","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

Fast Content Adaptive Representation Selection in HEVC-Based Video Coding for Streaming Applications 基于hevc的流媒体视频编码中的快速内容自适应表示选择

2022 International Symposium ELMAR Pub Date : 2022-09-12 DOI: 10.1109/ELMAR55880.2022.9899792

Jelena Suljug, S. Rimac-Drlje

{"title":"Fast Content Adaptive Representation Selection in HEVC-Based Video Coding for Streaming Applications","authors":"Jelena Suljug, S. Rimac-Drlje","doi":"10.1109/ELMAR55880.2022.9899792","DOIUrl":"https://doi.org/10.1109/ELMAR55880.2022.9899792","url":null,"abstract":"Preparing the video content for adaptive video streaming and ensuring the best possible quality of experience (QoE) to end-users while minimizing the server memory consumption and needed computational power presents a challenging task. This paper presents a novel solution and notation of a model for the content-adaptive estimation of the bitrate for a certain spatial resolution for encoding with the High Efficiency Video Coding (HEVC) encoder. Compared to available solutions, the idea was to simplify the process of determining the bitrate ladder that takes into account the video content. Contrary to other solutions, the proposed solution does not require precoding or high computational power, thus it minimizes latencies so it can be used for real-time applications. The proposed model requires only the values of spatial and temporal information to determine the optimal bitrate ladder for a certain video sequence. The proposed solution consists of a representation selection model and a bitrate ladder model. The representation selection model is used to select the optimal bitrates for switching to higher spatial resolution. Pearson Linear Correlation Coefficient (PLCC) between the values estimated by the model and the measured values calculated for all video sequences used in the development of the model is 0.963 and for the test sequence is 0.975, confirming the accuracy of the model. In addition, the bitrate ladder model was developed to determine the bitrates for the desired quality levels. For the test sequence, the proposed model achieves a PLCC value of 0.9175, and the mean difference between estimated and measured values is 1.826 %.","PeriodicalId":115888,"journal":{"name":"2022 International Symposium ELMAR","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116662023","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