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Proceedings ELMAR 2006最新文献

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An Approach to Digital Watermarking of Speech Signals in the Time-Frequency Domain 语音信号时频数字水印的一种方法
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329531
S. Stankovic, I. Orović, N. Zaric, C. Ioana
{"title":"An Approach to Digital Watermarking of Speech Signals in the Time-Frequency Domain","authors":"S. Stankovic, I. Orović, N. Zaric, C. Ioana","doi":"10.1109/ELMAR.2006.329531","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329531","url":null,"abstract":"A watermarking scheme in the time-frequency domain is proposed. The region for watermark embedding is selected by using the S-method based on the time-frequency representation. Time-varying filter scheme is used to map the watermark sequence from the time-frequency domain to the time domain. Watermark detection is performed in the time-frequency domain. Theory is illustrated by the example","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"353 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131702132","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
WiMAX on 3.5 GHz Cell Size Calculation 3.5 GHz WiMAX小区尺寸计算
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329547
W. Afric, N. Matošić, D. Vakante
{"title":"WiMAX on 3.5 GHz Cell Size Calculation","authors":"W. Afric, N. Matošić, D. Vakante","doi":"10.1109/ELMAR.2006.329547","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329547","url":null,"abstract":"This paper deals with cell size calculation for fixed wireless access by using WiMAX technology that is going to be implemented in the Republic of Croatia. First part of the paper describes what WiMAX technology is. Second part of the paper present propagation model for fixed wireless access 802.16.3c-0129r4, which is offered by IEEE. Third part of the paper considers link budget and cell size calculation by using proposed propagation model. Fourth part of the paper shows results of the mathematical simulations. The emphasis of this paper is on the simulation method for calculating cell size for fixed wireless access","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122680812","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: 15
Multimedia Traffic Analysis of MPLS and non-MPLS Network MPLS和非MPLS网络的多媒体流量分析
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329567
J. Barakovic, H. Bajric, A. Husic
{"title":"Multimedia Traffic Analysis of MPLS and non-MPLS Network","authors":"J. Barakovic, H. Bajric, A. Husic","doi":"10.1109/ELMAR.2006.329567","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329567","url":null,"abstract":"Multi-protocol label switching is helpful in managing multimedia traffic when some links or paths are under and/or over utilized. This paper presents a comparative analysis of MPLS and non-MPLS network and shows that MPLS improved network performance for multimedia type applications in heavy traffic environments. Traffic engineering is the main strength of MPLS. Where an IP-based network is connectionless, MPLS based network defines definite paths for network traffic based on some quality of service level. The following simulation study is an effort to quantitatively illustrate the benefit of using MPLS in implementing multimedia applications","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115620567","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: 26
MPLS Throughput over GEO Satellites GEO卫星上的MPLS吞吐量
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329572
P. Trúchly, M. Urbanovic
{"title":"MPLS Throughput over GEO Satellites","authors":"P. Trúchly, M. Urbanovic","doi":"10.1109/ELMAR.2006.329572","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329572","url":null,"abstract":"The present situation in telecommunication domain is characterized by a main evolution trend-a convergence of the voice and data networks to the new next generation networks. Broadband satellite networks are one of the many networks which will be involved inside these networks where IP protocol appears to be a basic network protocol. However, QoS support is the weakness of IP and MPLS scheme could be the solution for that. Since the satellite links introduce unfavored conditions for data transmissions we decided to simulate behavior of MPLS in communication network with satellite geostationary links","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121723104","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
Thin Film Gas Sensor Modeling and Simulation 薄膜气体传感器建模与仿真
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329557
Nenad Galic, Igor Vujović, I. Kuzmanić
{"title":"Thin Film Gas Sensor Modeling and Simulation","authors":"Nenad Galic, Igor Vujović, I. Kuzmanić","doi":"10.1109/ELMAR.2006.329557","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329557","url":null,"abstract":"Gas sensors are used for fire detection, detection of gas in different spaces, i.e. in transportation of sensitive materials. Marine and navy applications are therefore very important. Model of a thin film conducting polymer gas sensor is described. There are two types of gas sensors' model: with alternative current and with direct current. MatLab program package has been used for gas sensor simulation. Results of simulation are compared with the published experimental data. Simulation results are satisfactory close to experimentally obtained characteristics of gas species. The results show how to identify different gas species by using dielectric properties of thin polymer film. This is possible because every gas species have different resonant frequency. Different resonant frequency causes changes in model parameters","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114616703","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
Optical code division multiple access methods BER measurement in real time environment 实时环境下的光码分多址误码率测量方法
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329587
I. Srdić, B.Z. Cihlar
{"title":"Optical code division multiple access methods BER measurement in real time environment","authors":"I. Srdić, B.Z. Cihlar","doi":"10.1109/ELMAR.2006.329587","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329587","url":null,"abstract":"The code division multiple access (CDMA) methods are extensively research during the past ten years. In CDMA measurement the real environment was simulated with various mathematical models. Any practical OCDMA system will require real time environment measurements with clock and data recovery (CDR). Performing CDR on OCDMA data and converting OCDMA signal to an NRZ signal will enable interoperability with standard digital circuits","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125698680","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
ML MIMO-OFDM Time Synchronization/Channel Estimation for Unknown Frequency Selective Fading Channels 未知频率选择性衰落信道的MIMO-OFDM时间同步/信道估计
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329561
A. Saemi, V. Meghdadi, J. Cances, M. Zahabi, J. Dumas
{"title":"ML MIMO-OFDM Time Synchronization/Channel Estimation for Unknown Frequency Selective Fading Channels","authors":"A. Saemi, V. Meghdadi, J. Cances, M. Zahabi, J. Dumas","doi":"10.1109/ELMAR.2006.329561","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329561","url":null,"abstract":"This paper addresses maximum-likelihood (ML) time synchronization algorithm joint with channel estimation for MIMO-OFDM systems in frequency selective fading channels. For this purpose a SISO joint maximum likelihood (ML) synchronization algorithm with channel estimation is extended and generalised to MIMO systems. Timing failure probability is presented as a criterion to illustrate the robustness of the algorithm. The performance of the proposed synchronization approach, in terms of timing failure probability, was compared with SISO systems. Based on simulation results, the performance of the proposed algorithm is quite satisfying","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123639775","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
Complex antenna systems and their implementation in the mobile communications radio access network 移动通信无线接入网中的复杂天线系统及其实现
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329546
N. Belancic, E. Zentner
{"title":"Complex antenna systems and their implementation in the mobile communications radio access network","authors":"N. Belancic, E. Zentner","doi":"10.1109/ELMAR.2006.329546","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329546","url":null,"abstract":"The configuration of an antenna system greatly affects the quality and parameters of a mobile communication system. Since the adaptive antenna system is becoming increasing present in commercial communication systems, the purpose of this paper is the analysis of such conditions concerning a number of aspects. Therefore, this paper briefly presents the impact of antenna systems on the quality of mobile communication systems, and a number of basic antenna system configurations are presented amongst which is the adaptive antenna system, being the most complex of such systems. An analysis of their advantages and shortcomings, improvements expected through the implementation of the particular analysed antenna systems confirms that the only adaptive antenna system representing a complete solution in improving the parameters of a radio access network, which justifies and imposes reasons for investing in the researching and urgent development of these systems","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125109765","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
GPS Ionospheric Error Correction Models GPS电离层误差校正模型
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329552
R. Filjar, T. Kos, I. Markežić
{"title":"GPS Ionospheric Error Correction Models","authors":"R. Filjar, T. Kos, I. Markežić","doi":"10.1109/ELMAR.2006.329552","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329552","url":null,"abstract":"Ionospheric errors are the most influential source of the GPS positioning errors. In an attempt to at least partially improve the GPS positioning process, a global ionospheric correction model is introduced within the standard GPS positioning service. Referred to as the Klobuchar model after its inventor, this model appeared as a compromise between computation complexity and correction accuracy. Unfortunately, the Klobuchar model is capable of correcting up to 70% of ionospheric errors, with particularly poor performance during severe ionospheric disturbances. Wide implementations of satellite navigation systems (GPS in particular) in modern technical systems call for better corrections of the ionospheric influence. This article presents three essential approaches in modelling the GPS ionospheric errors (physical, empirical and dynamic models) and discusses their implementation in GPS-based technical systems","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130184921","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: 17
2.5 Gbit/s PRBS Generator and Checker 2.5 Gbit/s PRBS发生器和校验器
Proceedings ELMAR 2006 Pub Date : 2006-06-07 DOI: 10.1109/ELMAR.2006.329585
L. Pavlovič, M. Vidmar, S. Tomažič
{"title":"2.5 Gbit/s PRBS Generator and Checker","authors":"L. Pavlovič, M. Vidmar, S. Tomažič","doi":"10.1109/ELMAR.2006.329585","DOIUrl":"https://doi.org/10.1109/ELMAR.2006.329585","url":null,"abstract":"A novel approach in the implementation of a high-speed linear-feedback shift register (LFSR) using a single D-flip-flop is presented. A PRBS data generator and checker using discrete-logical devices are presented as an example. Due to the discrete-logical components used, special device-interconnection techniques must be used to reduce the signal-integrity problems and optimize the device interconnection for optimal system performance","PeriodicalId":430777,"journal":{"name":"Proceedings ELMAR 2006","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129213556","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: 4
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