2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA)最新文献_第3页

Artificial Bandwidth Extension Using H∞ Optimization and Speech Production Model 基于H∞优化和语音产生模型的人工带宽扩展

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733452

Deepika Gupta, H. S. Shekhawat

{"title":"Artificial Bandwidth Extension Using H∞ Optimization and Speech Production Model","authors":"Deepika Gupta, H. S. Shekhawat","doi":"10.1109/RADIOELEK.2019.8733452","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2019.8733452","url":null,"abstract":"This work presents a new method for artificial bandwidth extension (ABE) in narrowband telephonic communication. In this regard, we use signal model and H∞ optimization to obtain a synthesis filter for representing the wideband information of a signal. We need to estimate the high-band information in narrowband communication. Hence, we construct a high-band filter which retains the high-band information of the synthesis filter. Signal models may not be the same for different speech signals because of their non-stationary (time-varying) behavior. Hence, a short time processing (framing) is applied to speech signals for converting them into the stationary frames. Signal models of stationary frames may be different. As a result, their high-band filters will vary. So, a Gaussian mixture modelling (GMM) codebook approach is used to store the high-band filters information along with their narrowband information (narrowband feature). This approach is also used to estimate the high-band filter information for a given narrowband feature of the signal. Performance analysis is done for the two types of narrowband information representations.","PeriodicalId":336454,"journal":{"name":"2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"54 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":"126743123","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

Optimization Strategies for Automated Parallelization for Multicore Architectures 多核体系结构自动并行化的优化策略

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733489

A. Ivutin, A. Troshina, A. Novikov

引用次数: 2

The Impact of PAPR on the Wireless Power Transfer in IoT Applications PAPR对物联网应用中无线电力传输的影响

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733534

Jānis Eidaks, A. Litvinenko, D. Pikulins, Sergejs Tjukovs

{"title":"The Impact of PAPR on the Wireless Power Transfer in IoT Applications","authors":"Jānis Eidaks, A. Litvinenko, D. Pikulins, Sergejs Tjukovs","doi":"10.1109/RADIOELEK.2019.8733534","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2019.8733534","url":null,"abstract":"This paper is dedicated to the experimental study of the impact of multi-tone signal with a high peak-to-average power ratio (PAPR) on the performance of wireless power transfer (WPT) using a single stage Cockcroft-Walton voltage multiplier with HSMS-285C diodes. The study is done using unlicensed sub-GHz frequencies 863 – 868 MHz in a laboratory under real-life conditions. Two types of design of radio frequency (RF) energy harvesting device (with and without matching network) are used to demonstrate PAPR impact on WPT performance. Eight sub-carriers summed in-phase are used to produce a multi-tone signal with a high PAPR level. For WPT results comparison, a single-tone signal with the same average power is exploited. For the experimental implementation of WPT, pairs of directional (LP0410 Log Periodic PCB) and omnidirectional (VERT900) antennas are used. Moreover, during the experiments the distance between transmitting and receiving antennas is being changed up to 3.2m. The main objective of the experiment is to find conditions when multi-tone signal with a high PAPR provides substantially higher output power compared to single-tone signal. The experimental measurement process includes evaluating the average power at the RF rectifier circuit output for different signals, distances, antennas, and RF-DC converter circuit designs. Furthermore, an additional WPT experiment is performed and the analysis of channel characteristics in the frequency range of interest is done to investigate the reason of the difference between the harvested power using single-tone and multi-tone signals.","PeriodicalId":336454,"journal":{"name":"2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"164 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":"132867136","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: 9

On the Canonical Circuit Realizations of Fourth-Order and Fifth-Order Hyperjerk Chaotic Function 四阶和五阶超跳混沌函数的正则电路实现

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733499

J. Petrzela

引用次数: 0

Reducing the Complexity of FS-FBMC Receivers using Hopping DFT 利用跳频DFT降低FS-FBMC接收机的复杂度

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733498

H. Al-amaireh, Z. Kollár

引用次数: 4

Comparison of Helix Antennas Operated on 2.4, 5.2 and 9.2GHz for FSO/RF Hybrid System FSO/RF混合系统中2.4、5.2和9.2GHz螺旋天线的比较

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733494

M. Márton, Ľ. Ovseník, J. Turán, M. Spes, J. Urbanský

{"title":"Comparison of Helix Antennas Operated on 2.4, 5.2 and 9.2GHz for FSO/RF Hybrid System","authors":"M. Márton, Ľ. Ovseník, J. Turán, M. Spes, J. Urbanský","doi":"10.1109/RADIOELEK.2019.8733494","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2019.8733494","url":null,"abstract":"Communication technologies have the dominant effect to human lives. We are surrounded by these technologies in personal and professional lives too. Digitalization sets the trend in all these areas. Communication technologies easy the fulfillment of our tasks in professionals areas and open the next door of possibilities of spending our free time. Responsibility that was on human, is today directly on end devices. The expansion of these technologies is so significant that it has almost negative impact on human lives. In many cases, we are slaves of technologies. Requirements of users on availability of communication technologies are still growing and we have to offer the solution. Optical fiber communication systems create the backbone of high speed communication systems. We are focused on using optical communication systems without needs of optical fiber. Free Space Optics (FSO) systems offer comparable transmission rates as optical fibers communication systems. The main drawback of FSO technologies is sensitivity to weather changes, so we have to design appropriate radio-frequency (RF) backup link. Analysis of the appropriate type of helix antenna is the point of this paper. We designed three models of helix antennas operating on three different frequencies from non-licensed frequency range.","PeriodicalId":336454,"journal":{"name":"2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA)","volume":"46 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":"124636154","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

Discrete Wavelet Design for Target Classification in Pulse-Doppler Surveillance Radar 脉冲多普勒监视雷达目标分类的离散小波设计

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733551

Michael Mesarcik, S. Lewis, A. Mishra, J. Pidanic, Karel Juryca

引用次数: 2

Simple Calibration of FMCIW 35 GHz Meteorological Radar "PCDR 35" FMCIW 35ghz气象雷达“PCDR 35”的简单定标

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733461

O. Fiser, K. Pitaš

引用次数: 1

Design and Practical Realization of Lumped Element RF Bandpass Filter 集总元射频带通滤波器的设计与实现

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733480

Tom Bielik, B. Adamec, V. Hottmar

引用次数: 0

Power Supply System for Industrial Packaged Magnetrons Group 工业封装磁控管组供电系统

2019 29th International Conference Radioelektronika (RADIOELEKTRONIKA) Pub Date : 2019-04-01 DOI: 10.1109/RADIOELEK.2019.8733579

A. Zemtsov, I. Artyukhov

引用次数: 3