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2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services最新文献

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Active Hybrid Band-pass Filter for Microwave Telecommunication Systems Using High-order Modulations 用于高阶调制微波通信系统的有源混合带通滤波器
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4375972
S. Jovanovic, A. Nesic
{"title":"Active Hybrid Band-pass Filter for Microwave Telecommunication Systems Using High-order Modulations","authors":"S. Jovanovic, A. Nesic","doi":"10.1109/TELSKS.2007.4375972","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4375972","url":null,"abstract":"This paper presents a concept, design and realization of an active hybrid band-pass filter that provides both amplifying and filtering function within a modern wideband converter capable to handle high-order modulated digital signal. This paper introduces a new type of a microstrip band-pass filter element that serves as passive parts of the active hybrid filter.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126800647","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
Fractal and Multifractal Analysis of Heart Rate Variability 心率变异性的分形与多重分形分析
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376003
M. Rudinac, M. Uscumlic, S. Rudinac, B. Milovanović, I. Reljin, B. Reljin
{"title":"Fractal and Multifractal Analysis of Heart Rate Variability","authors":"M. Rudinac, M. Uscumlic, S. Rudinac, B. Milovanović, I. Reljin, B. Reljin","doi":"10.1109/TELSKS.2007.4376003","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376003","url":null,"abstract":"The paper considers the heart rate variability from the fractal and multifractal standpoints. The short-term inter-beat intervals for arrhythmia patients, recorded before, after and during the amiodarone therapy, have been analyzed.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125827947","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
Error Probability Evaluation for RAKE Reception of DS-CDMA Signals with MRC and EGC Combining in Rayleigh Fading 瑞利衰落下MRC和EGC结合的DS-CDMA信号RAKE接收误差概率评估
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4375963
S. Halunga, M. Ionescu, O. Fratu
{"title":"Error Probability Evaluation for RAKE Reception of DS-CDMA Signals with MRC and EGC Combining in Rayleigh Fading","authors":"S. Halunga, M. Ionescu, O. Fratu","doi":"10.1109/TELSKS.2007.4375963","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4375963","url":null,"abstract":"The RAKE correlator is a digital receiver for DS- CDMA signals that takes advantage of the autocorrelation properties of the spreading/scrambling sequences in order to resolve and efficiently combine the multipath received components in order to increase the average received signal to noise ratio (SNR). Assuming slow, selective, uncorrelated Rayleigh fading with an equally spaced exponential power delay profile, a decision aided (DA) scheme is proposed in order to estimate the complex channel coefficients needed for coherent combining. Monte Carlo simulations are carried out to comparatively assess the performance of maximal ratio combining (MRC) and equal gain combining (EGC) RAKE reception. Channel estimation using the UMTS downlink primary common pilot channel (P-CPICH) is discussed. Thus, the rough estimates resulted after descrambling the corresponding signal are further refined by way of the above mentioned DA scheme.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128391267","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
One Realization of Low-Power Wireless Sensor Node 低功耗无线传感器节点的一种实现
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376053
Goran S. Nikoli, Branislav Petrovi
{"title":"One Realization of Low-Power Wireless Sensor Node","authors":"Goran S. Nikoli, Branislav Petrovi","doi":"10.1109/TELSKS.2007.4376053","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376053","url":null,"abstract":"In this paper a practical realization of sensor node is described. Performance analysis for new implemented protocol is also described. In proposed model a sensor network is organized into local clusters. Within the cluster a nodes are battery powered and fixed cluster-head or gateway node have large power supply. In this paper a data exchange between sensor node and cluster head only bee analyzed. Data exchange and number of nodes in cluster is effect statistical analysis based upon in Poisson distribution. Minimum number of trials needed to be sure that the packet reaches the receiver with prescribed probability for varying bit error rate is discussed, too. Lastly, for our hardware solution and example application for temperature measurement energy consumption analysis is given. Comparative results display a power consumption reduction of one order of magnitude regard to previous solution.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125623604","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
Baseband Signal Processor for Digital RR Link with Direct IQ Modulator 带直接IQ调制器的数字RR链路基带信号处理器
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376068
V. Orlic, M. Perić, S. Jovanovic
{"title":"Baseband Signal Processor for Digital RR Link with Direct IQ Modulator","authors":"V. Orlic, M. Perić, S. Jovanovic","doi":"10.1109/TELSKS.2007.4376068","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376068","url":null,"abstract":"In this paper, a subsystem is described for generation of baseband signal with direct IQ modulation to serve the following purposes: information signal filtering in order to satisfy ETSI spectrum mask, generation of signals for direct modulator imperfection SSB (single side band) test and two- tone microwave amplifiers nonlinearity test. Implemented hardware and DSP (digital signal processing) solutions are described in details, and results of testing within the scope of 18 GHz system are presented.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128019061","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
Design and Realization of Efficient IIR Digital Filter Structures Based on Sensitivity Minimizations 基于灵敏度最小化的高效IIR数字滤波器结构设计与实现
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4375998
G. Stoyanov, Z. Nikolova, K. Ivanova, V. Anzova
{"title":"Design and Realization of Efficient IIR Digital Filter Structures Based on Sensitivity Minimizations","authors":"G. Stoyanov, Z. Nikolova, K. Ivanova, V. Anzova","doi":"10.1109/TELSKS.2007.4375998","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4375998","url":null,"abstract":"It is shown in this paper how sensitivity minimization over specific frequency ranges and even only for several frequencies in the case of narrow-band filters permits a usage of a very short coefficient word-length, leading to a higher accuracy, lower power consumption and simple multiplierless implementation. Similar results are obtained for variable and complex digital filters, for fractional delay filter realizations and for adaptive real and complex filters. The proposed methods and procedures are verified experimentally. They are simple and easily applicable in the standard engineering design and they do not require complicated optimizations.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130504853","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: 16
Performance Evaluation for Remote Access VPN on Windows Server 2003 and Fedora Core 6 远程接入VPN在Windows Server 2003和Fedora Core 6上的性能评估
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376082
A.A. Joha, F. Ben Shatwan, M. Ashibani
{"title":"Performance Evaluation for Remote Access VPN on Windows Server 2003 and Fedora Core 6","authors":"A.A. Joha, F. Ben Shatwan, M. Ashibani","doi":"10.1109/TELSKS.2007.4376082","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376082","url":null,"abstract":"A virtual private network (VPN) can be defined as way to provide secure communication between members of a group through use of the public telecommunication infrastructure, maintaining privacy through the use of a tunneling protocol and security procedures. VPN systems provide users with the illusion of a completely private network. This work examines and empirically evaluates the remote access VPN protocols, namely point to point tunneling protocol (PPTP), layer 2 tunneling protocol over Internet protocol security (L2TP/IPSec), and secure socket layer (SSL). We explore the impact of these protocols on end-to-end user application performance using metrics such as throughput, RTT, jitter, and packet loss. All experiments were conducted using a Windows XP SP/2 host (VPN client) connected to a Windows Srver 2003 host (VPN server) and to a Fedora Core 6 host (VPN server).","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121267790","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
An Application of Heuristic Algorithm Based on Route Minimum Cost for RWA in All-Optical WDM Networks 基于路由最小代价的启发式算法在全光WDM网络中的应用
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376021
Goran Z. Markovic, V. Acimovic-Raspopovic, Dusan B. Teodorovic
{"title":"An Application of Heuristic Algorithm Based on Route Minimum Cost for RWA in All-Optical WDM Networks","authors":"Goran Z. Markovic, V. Acimovic-Raspopovic, Dusan B. Teodorovic","doi":"10.1109/TELSKS.2007.4376021","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376021","url":null,"abstract":"In this paper a heuristic algorithm based on alternate routing approach that considers jointly every route-wavelength pair in order to choose one with a minimum cost to establish a lightpath is applied for solving the RWA (routing and wavelength assignment) problem in optical WDM (wavelength division multiplexing) network in a case of dynamic traffic demands. We performed numerous simulations to obtain and analyse the blocking probability performance of this algorithm. The programme code we developed for simulation can be efficiently applied for various network topologies as well as for various traffic demands, number of wavelengths and number of alternate routes in a given network.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116589525","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
LD-LogWestwood+ TCP for Wireless Networks LD-LogWestwood+ TCP无线网络
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4376019
M. Delibasic, I. Radusinović
{"title":"LD-LogWestwood+ TCP for Wireless Networks","authors":"M. Delibasic, I. Radusinović","doi":"10.1109/TELSKS.2007.4376019","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4376019","url":null,"abstract":"TCP is the most commonly used transport protocol on the Internet tuned to perform well in traditional networks made up of wired links with low bit error rates. Networks with higher bit error rates, such as those with wireless links, violate many of the assumptions made by TCP, causing degradation of end-to-end performance. In this paper we present modification of LogWestwood+ TCP in order to improve its performance in wireless environment using different levels of aggressiveness in the case of congestion loss and in the case of wireless loss.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128284456","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
Bit-Interleaved LDPC-Coded Modulation Suitable for Free-Space Optical Communication over the Atmospheric Turbulence Channel 适用于大气湍流信道自由空间光通信的位交织ldpc编码调制
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services Pub Date : 2007-11-05 DOI: 10.1109/TELSKS.2007.4375981
I. Djordjevic, G. Djordjevic
{"title":"Bit-Interleaved LDPC-Coded Modulation Suitable for Free-Space Optical Communication over the Atmospheric Turbulence Channel","authors":"I. Djordjevic, G. Djordjevic","doi":"10.1109/TELSKS.2007.4375981","DOIUrl":"https://doi.org/10.1109/TELSKS.2007.4375981","url":null,"abstract":"We determine the channel capacity of coded repetition MIMO scheme assuming non-ideal p.i.n. photodetection, and the channel is modeled using the statistical model due to Al-Habash et al. The coded repetition MIMO scheme is suitable for communication over the strong atmospheric turbulence channel. The scheme under study employs the Q-ary pulse position modulation and low-density parity-check (LDPC) codes. Component LDPC codes are designed using the concept of pairwise-balanced designs.","PeriodicalId":350740,"journal":{"name":"2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116771640","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
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