2019 26th International Conference on Telecommunications (ICT)最新文献_第5页

A New Measurement Technique to Determine the Maximum SAR of Multiple-Antenna Transmitters Using $K$-Order Models and Scalar E-Field Probes 基于K阶模型和标量电场探头的多天线发射机最大SAR测量新技术

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798802

T. Dinh, Kun Li, Soichi Watanabe, Y. Karasawa

{"title":"A New Measurement Technique to Determine the Maximum SAR of Multiple-Antenna Transmitters Using $K$-Order Models and Scalar E-Field Probes","authors":"T. Dinh, Kun Li, Soichi Watanabe, Y. Karasawa","doi":"10.1109/ICT.2019.8798802","DOIUrl":"https://doi.org/10.1109/ICT.2019.8798802","url":null,"abstract":"In this paper, we develop an $K$-order model expressing the specific absorption rate (SAR) at an observation point when evaluating the electromagnetic exposure to multiple-antenna transmitters. By using the proposed model, we will be able to precisely estimate the SARs for different combinations of the relative phases of the sources, and thus to identify the maximum SAR. Detailed discussions on the $K$-order model and the estimation technique will be presented. We also conduct several measurements to verify the performance of the proposed estimation technique, and compare the effectiveness the proposed technique with conventional techniques. As a result, it is confirmed that the proposed technique with $K$-order estimations can considerably reduce the estimation errors, and thus giving highly precise estimated SAR values. In particular, when evaluating of the SAR of a three-antenna configuration, the maximum estimation error caused by conventional estimations is about 6%, which can be reduced to about 3% or 2% by the 1- and 2-order estimations, respectively.","PeriodicalId":127412,"journal":{"name":"2019 26th International Conference on Telecommunications (ICT)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115137046","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

Power Allocation for Proactive Eavesdropping with Spoofing Relay in UAV Systems 基于欺骗中继的无人机系统主动窃听功率分配

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798768

Mingzhu Zhang, Yu Chen, Xiaofeng Tao, I. Darwazeh

引用次数: 7

Deep Learning Models for Tuberculosis Detection from Chest X-ray Images 基于胸部x射线图像的结核病检测的深度学习模型

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798798

Quang H. Nguyen, Binh P. Nguyen, S. D. Dao, Balagopal Unnikrishnan, R. Dhingra, Savitha Rani Ravichandran, Sravani Satpathy, Nirmal Raja Palaparthi, M. Chua

引用次数: 37

Performance Analysis of Vertical and Higher Order Sectorization in Urban Environment at 28 GHz 28ghz城市环境下垂直和高阶扇区性能分析

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798789

Muhammad Usman Sheikh, K. Ruttik, R. Jäntti

{"title":"Performance Analysis of Vertical and Higher Order Sectorization in Urban Environment at 28 GHz","authors":"Muhammad Usman Sheikh, K. Ruttik, R. Jäntti","doi":"10.1109/ICT.2019.8798789","DOIUrl":"https://doi.org/10.1109/ICT.2019.8798789","url":null,"abstract":"The main aim of this paper is to compare the performance of a cellular network using higher order sectorization in a horizontal domain, vertical sectorization, and super cell configuration. The urban macrocellular environment from the city of Helsinki is targeted, and 28 GHz frequency is used as the frequency of operation. Conventional three sector site deployment scenario is also included for reference. The comparative analysis is conducted from different dimensions, and the performance metrics considered in this study includes the SINR, the inner sector traffic share, server dominance with 3 dB overlapping window, and the spectral efficiency of the system. This research work is carried out by doing 3D ray tracing simulations utilizing “sAGA”, a MATLAB based 3D ray tracing tool. It is found more complicated to find the optimal antenna configuration for vertical sectorization and super cell configuration in comparison with higher order sectorization. It is also established from the acquired results that the higher order sectorization is an easy approach for enhancing the cell capacity compared with vertical sectorization and super cell configuration. Higher order sectorization provides a spectral efficiency gain of around 96.7%, whereas the relative spectral efficiency gain of vertical sectorization and super cell configuration is limited to 62.8% and 10.6%, respectively, with respect to three sector site deployment.","PeriodicalId":127412,"journal":{"name":"2019 26th International Conference on Telecommunications (ICT)","volume":"3 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123411339","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

Visible Light Communications: Simplified Co-Equalisation of Fast OFDM in a Multiple-Input Multiple-Output Configuration 可见光通信:多输入多输出配置中快速OFDM的简化共均衡

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798821

P. Haigh, A. Burton, Zabih Ghassemlooy, I. Darwazeh

引用次数: 2

Extended Space Shift Keying Modulation With Different Receiver Strategies 不同接收策略下的扩展空间移位键控调制

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798766

A. Mokh, M. Hélard, M. Crussiére

引用次数: 2

Quality Estimation of Noisy Speech Using Spectral Entropy Distance 基于谱熵距离的含噪语音质量估计

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798783

Gabriel Mittag, S. Möller

{"title":"Quality Estimation of Noisy Speech Using Spectral Entropy Distance","authors":"Gabriel Mittag, S. Möller","doi":"10.1109/ICT.2019.8798783","DOIUrl":"https://doi.org/10.1109/ICT.2019.8798783","url":null,"abstract":"In this paper, we propose to use spectral entropy distance as a new measure for objective quality estimations of noisy speech. While the perceived quality estimation of a transmitted speech signal under background noise is fairly straight forward, the estimation of noise on active speech is more complex. For example, an increase in loudness can be confused as noise by common quality measures. Also, other distortions, such as interruptions due to packet loss, can decrease the energy in the degraded signal and thus lead to an underestimation of the noisiness. This is especially critical when the noise is only present during active speech segments, as it is the case for quantization noise caused by low bitrate codecs or voice activity detections at the receiver side. The spectral entropy, however, only considers the frequency composition of a signal and does not depend on the signal energy. Therefore, it gives a robust measure of how noisy a signal is in the presence of active speech. In our experiments, we trained a prediction model based on the spectral entropy and obtained excellent prediction results that show that the spectral entropy distance is indeed a useful tool for the quality estimation of noisy speech.","PeriodicalId":127412,"journal":{"name":"2019 26th International Conference on Telecommunications (ICT)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121186894","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

Improving Energy Efficiency of Finite Time FTN Pulses Detection by Choosing Optimal Envelope Shape 选择最优包络形状提高有限时间FTN脉冲检测的能量效率

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798830

I. Lavrenyuk, A. Ovsyannikova, S. Zavjalov, S. Volvenko, S. Makarov

引用次数: 14

An Enhanced Relay Selection Scheme for NOMA-based Cooperative Opportunistic Multicast Scheme 一种基于noma的合作机会组播中继选择增强方案

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798861

Yufang Zhang, Xiaoxiang Wang, Dongyu Wang, Qiang Zhao, Yibo Zhang

引用次数: 0

Optimal Packet Length for Cooperative Systems 合作系统的最优数据包长度

2019 26th International Conference on Telecommunications (ICT) Pub Date : 2019-04-01 DOI: 10.1109/ICT.2019.8798851

Ghassan Alnwaimi, H. Boujemaa

引用次数: 0