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2008 18th International Conference Radioelektronika最新文献

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OFDM PAPR reduction by Partial Transmit Sequences and Simplified Clipping with Bounded Distortion 利用部分传输序列和有界失真简化裁剪降低OFDM的PAPR
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542686
J. Urban, R. Maršálek
{"title":"OFDM PAPR reduction by Partial Transmit Sequences and Simplified Clipping with Bounded Distortion","authors":"J. Urban, R. Maršálek","doi":"10.1109/RADIOELEK.2008.4542686","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542686","url":null,"abstract":"This paper is focused in the domain of peak to average power ratio (PAPR) reduction of orthogonal frequency division multiplex (OFDM) signals. Combination of partial transmit sequences (PTS) and simplified clipping and filtering with bounded distortion (SCAFBD) is proposed. The first mentioned method is distortionless, but needs to transmit a side information in every OFDM symbol. The second method introduces signal distortion. The combination of methods results in better PAPR reduction and lower bit error rate (BER). The performance is evaluated in AWGN channel.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122839062","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
The understanding of communication packets structure for microcontrollers debugging 微控制器调试中通信数据包结构的理解
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542717
T. Fryza
{"title":"The understanding of communication packets structure for microcontrollers debugging","authors":"T. Fryza","doi":"10.1109/RADIOELEK.2008.4542717","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542717","url":null,"abstract":"The paper is focused into microcontroller technique and mainly describes a communication protocol between master PC and slave emulator for the programming and debugging of AYR microcontrollers from Atmel Corporation. The JTAGICE mkll debugging device is used. In principle this device is controlled via supervised development tools titled AVR Studio. The purpose of this contribution is to understand the structure of the communication protocol, thus the AVR Studio could be replaced by any application. The paper represents the preliminary study for developing the microcontroller system controlled via Internet. The communication with JTAGICE mkll has serial asynchronous character, where transmitted and received data are encapsulated into frames or packets. Each frame has its own structure and meaning. In the text the detailed description of selected frames will be presented.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130355940","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 improved DE algorithm for filter design 改进的DE算法用于滤波器设计
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542711
P. Martínek, D. Ticha
{"title":"The improved DE algorithm for filter design","authors":"P. Martínek, D. Ticha","doi":"10.1109/RADIOELEK.2008.4542711","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542711","url":null,"abstract":"A modification of DE algorithm using Simplex method serving as convergence accelerator is described. The first part is devoted to analysis of the Simplex method arrangement in DE algorithm, the following part introduces some results obtained by practical application of modified algorithm in analog filter design. As shown, the best version based on partial optimization of the selected individuals in population during the \"coarse\" run and final optimization of the \"best\" individual brings significant reduction of computation time and number of iteration cycles.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123193408","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
Noncoherent recognition of OFDM modulation OFDM调制的非相干识别
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542703
K. Ulovec
{"title":"Noncoherent recognition of OFDM modulation","authors":"K. Ulovec","doi":"10.1109/RADIOELEK.2008.4542703","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542703","url":null,"abstract":"This paper deals with noncoherent recognition of modulation types. The main goal is to discriminate a multi-carrier OFDM modulation type from some single-carrier analog and digital modulation types. The proposed solution uses statistics of the received signal, which is observed on the signal amplitude at the output of the intermediate-frequency stage. Not only AWGN noise is used to verify the properties of the recognizer, but also presence of the multi-path propagation.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129007497","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
Low bitrate video coding using Karhunen- Loeve transform 使用Karhunen- Loeve变换的低比特率视频编码
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542724
L. Fritsch
{"title":"Low bitrate video coding using Karhunen- Loeve transform","authors":"L. Fritsch","doi":"10.1109/RADIOELEK.2008.4542724","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542724","url":null,"abstract":"Low bitrate video coding is very important in image data transmission via telephone links, radio channels etc. There are two main requirements- small frequency bandwidth of the transmission channel and satisfactory quality of decoded video frames. In this paper is presented an effective image codec, which is based on Karhunen- Loeve transform. First is described the main idea of this image codec, then follows description of mathematical background, at the end are presented experimental results.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123331094","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
Architecture of invariant transform based traffic sign recognition system 基于不变变换的交通标志识别系统体系结构
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542684
J. Turin, J. Turán, Ľ. Ovseník, M. Fifik
{"title":"Architecture of invariant transform based traffic sign recognition system","authors":"J. Turin, J. Turán, Ľ. Ovseník, M. Fifik","doi":"10.1109/RADIOELEK.2008.4542684","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542684","url":null,"abstract":"Driver assistance system try to help driver in driving process, support him with all possible information, that can be obtained from different sensors installed in the car, or take control over the car if it is necessary. Many of these systems are in develop, and many groups of scientist (engineers) are searching for new methods to solve different problems in this field (vehicle detection, traffic sign detection, license plate recognition, pedestrian's detection, etc.). In this paper we focus on traffic sign recognition. New developed invariant transform based traffic sign recognition system is here described. The architecture of proposed system involves fast processing method and method based on invariant transform. Experiments are shown and potential application of this system is discussed.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133746925","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
Oscillator phase noise models 振荡器相位噪声模型
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542705
O. Baran, M. Kasal
{"title":"Oscillator phase noise models","authors":"O. Baran, M. Kasal","doi":"10.1109/RADIOELEK.2008.4542705","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542705","url":null,"abstract":"Harmonic signal sources can be found in almost all modern electronic systems. These generators serve e.g. as clock sources for timing or they can be used for synchronization. In all cases, strict claims are posed on a quality of the output signal, especially the stability, the purity and the signal level. This article deals with the modeling of the oscillator phase noise. The general definition of the phase noise is explained and the single sideband phase noise course is shown. Various oscillator phase noise models are introduced. Each model is described and its parameters affecting the phase noise are studied. The phase noise impact to the precise oscillator design is mentioned.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123005791","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
Hardware platform for testing performance of TRNGs embedded in actel fusion FPGA 基于actel融合FPGA的trng测试硬件平台
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542712
M. Varchola, M. Drutarovský, R. Fouquet, Viktor Fischer
{"title":"Hardware platform for testing performance of TRNGs embedded in actel fusion FPGA","authors":"M. Varchola, M. Drutarovský, R. Fouquet, Viktor Fischer","doi":"10.1109/RADIOELEK.2008.4542712","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542712","url":null,"abstract":"The paper presents hardware SoPC platform for testing performance of various TRNGs embedded in Actel FPGAs. The SoPC was implemented in the recent Actel Fusion ARM enabled FPGA device. It consists of four main blocks - CoreMP7 (Actel's soft-core industry standard ARM7processor) for managing the SoPC, SRAM and Flash memories embedded inside the FPGA for storage and execution of CoreMP7 embedded software, custom TRNG design and Hi-Speed USB 2.0 interface based on a Cypress USB microcontroller for fast download of generated data to the computer. TRNG and USB interface peripherals are directly connected to the CoreMP7 peripheral bus to improve flexibility of using it. The results of NIST statistical testing of experimental PLL-based TRNG implementation demonstrate potential of designed hardware platform as well as new feature of Actel Fusion FPGAs - internal RC oscillator that could enhance security of the implemented TRNGs.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"224 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671299","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: 6
Universal current-mode Gm-C biquad 通用电流模式Gm-C biquad
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542710
D. Biolek, V. Biolková, Z. Kolka
{"title":"Universal current-mode Gm-C biquad","authors":"D. Biolek, V. Biolková, Z. Kolka","doi":"10.1109/RADIOELEK.2008.4542710","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542710","url":null,"abstract":"A universal current-mode biquad is described which is designed on the basis of well-known KHN (Kerwin, Huelsman, Newcomb) voltage-mode filter. In its most general form, the circuit consists of five operational transconductance amplifiers (OTAs) and of two grounded capacitors. The filter provides simultaneously three current outputs of HP, BP, and LP types into independent loads. The quality factor can be adjusted electronically independently on the natural frequency. Less rigorous rules of controlling the filter parameters can imply a reduction of number of OTAs to three or even two. The principle is verified by Spice simulation on the level of a CMOS structure of OTAs.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127253392","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: 11
Asynchronous logical system simulation in VHDL 异步逻辑系统仿真VHDL
2008 18th International Conference Radioelektronika Pub Date : 2008-04-24 DOI: 10.1109/RADIOELEK.2008.4542725
M. Kovác, M. Kubícek
{"title":"Asynchronous logical system simulation in VHDL","authors":"M. Kovác, M. Kubícek","doi":"10.1109/RADIOELEK.2008.4542725","DOIUrl":"https://doi.org/10.1109/RADIOELEK.2008.4542725","url":null,"abstract":"The following article describes the fundamentals of asynchronous logical systems from handshaking protocols to Muller pipeline. Understanding these fundamentals is important to analysing problems. The aim of this article is to solve problems with the design and simulation of asynchronous circuits. The final results are simulation models of a 4-phase bundled-data pipeline and a 4-phase dual-rail pipeline. The simulation models were generated in the simulation tool Modelsim with real gate delays and with zero wire delays.","PeriodicalId":162482,"journal":{"name":"2008 18th International Conference Radioelektronika","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126400417","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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