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Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)最新文献

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A guard interval based frequency offset compensation scheme for MC-CDMA up-link 基于保护间隔的MC-CDMA上行链路频偏补偿方案
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341136
Mashury, H. Ali
{"title":"A guard interval based frequency offset compensation scheme for MC-CDMA up-link","authors":"Mashury, H. Ali","doi":"10.1109/ISSPIT.2003.1341136","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341136","url":null,"abstract":"In this paper, a new frequency offset compensation scheme for up link of multicarrier code-division multiple access (MC-CDMA) systems is proposed. The proposed scheme exploits guard interval (GI) information embedded in MC-CDMA symbol blocks and is an extension of the work in F. Daffara and A. Chouly (May 1993). Simulation results show that the new scheme results in improved performance in MC-CDMA uplink.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129852418","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
Mapping-based uncertainty relations for periodic functions 周期函数的基于映射的不确定性关系
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341198
M. J. Bastiaans, M. Alonso
{"title":"Mapping-based uncertainty relations for periodic functions","authors":"M. J. Bastiaans, M. Alonso","doi":"10.1109/ISSPIT.2003.1341198","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341198","url":null,"abstract":"Based on five different mappings of a function on a circle (i.e. a periodic function) to a function on a line or a line segment (i.e. a non-periodic function), measures for the width of a periodic function (expressed in terms of centered second-order moments) are studied, and the associated uncertainty relations are derived, using a generalized version of the Cauchy-Schwarz inequality.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"95 33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129209138","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
A fast multilevel method for matching stereo images 一种快速多级立体图像匹配方法
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341095
M. Hariti, Y. Ruichek, A. Koukam
{"title":"A fast multilevel method for matching stereo images","authors":"M. Hariti, Y. Ruichek, A. Koukam","doi":"10.1109/ISSPIT.2003.1341095","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341095","url":null,"abstract":"This work presents a method, which performs edge stereo matching at different levels, from significant edges to less significant ones. At each level, the process starts by selecting the significant edges with respect to their gradient magnitude. The selected edges are then matched in order to obtain the reference edges from which less significant edges are matched in the next level. The matching procedure is based on a voting scheme by using the local and global constraints. The performance of the proposed stereo matching method is evaluated for real-time obstacle detection in front of a vehicle using linear cameras.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124462396","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
A time synchronization scheme for quasi-synchronous up-link of MC-CDMA systems MC-CDMA系统准同步上行链路的时间同步方案
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341135
A. Purwoko, A. Hassan
{"title":"A time synchronization scheme for quasi-synchronous up-link of MC-CDMA systems","authors":"A. Purwoko, A. Hassan","doi":"10.1109/ISSPIT.2003.1341135","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341135","url":null,"abstract":"We propose a new method for time synchronization or time delay estimation in quasi-synchronous up link of multi-carrier code division multiple access (MC-CDMA) systems. The method is cyclic prefix based and estimates the average time delay of multipath multiuser signals. Position of cyclic prefix correlation peaks is estimated using a low complexity algorithm, which exploits the fact that these peaks exist in periodic fashion with a period equal the MC-CDMA frame length. This approach allows the fast Fourier transform (FFT) window placement at a fixed distance from the estimated time delay avoiding any intersymbol interference (ISI) users.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121084142","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
Conservative cascades: an invariant of Internet traffic 保守级联:互联网流量的一个不变量
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341058
S. Uhlig
{"title":"Conservative cascades: an invariant of Internet traffic","authors":"S. Uhlig","doi":"10.1109/ISSPIT.2003.1341058","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341058","url":null,"abstract":"Conservative cascades are among the class of multiscaling processes that accommodate the two competing objectives of deterministic and random cascades. This paper discusses in what sense the cascade model can be seen as an invariant of the Internet traffic. It explains why conservative cascades model the time-invariant properties of the Internet traffic at timescales up to hundreds of milliseconds. Furthermore, it shows the limitations of the conservative cascades to model part of the time-dependent scaling properties of Internet traffic.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117236096","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
Motion parameters estimation of moving objects and ego motion applying an active camera system 运动目标的运动参数估计和自我运动应用于有源相机系统
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341213
S. Stankovic, R. Herpers, I. Djurović
{"title":"Motion parameters estimation of moving objects and ego motion applying an active camera system","authors":"S. Stankovic, R. Herpers, I. Djurović","doi":"10.1109/ISSPIT.2003.1341213","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341213","url":null,"abstract":"An approach to motion parameters estimation of objects and parameters of ego motion by using active camera system is proposed. Motion estimation is performed through instantaneous frequency estimation in the regions of interest. In this way, a 3-D problem is reduced to a one-dimensional case. The spectrogram and the S-method are used for instantaneous frequency estimation. Function of support in time-frequency plane is introduced to reduce the analysis to the specified time-frequency region. Theory is illustrated by an example.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122319504","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
A novel batched multicast patching scheme for video broadcasting with low user delay 一种新的低用户延迟视频广播分批多播补丁方案
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341127
S.A. Azad, M. Murshed, L. Dooley
{"title":"A novel batched multicast patching scheme for video broadcasting with low user delay","authors":"S.A. Azad, M. Murshed, L. Dooley","doi":"10.1109/ISSPIT.2003.1341127","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341127","url":null,"abstract":"Reactive near-video-on-demand (NVOD) schemes provide instantaneous service, but the server bandwidth requirement becomes substantially high at high arrival rates. Proactive NVOID schemes are very attractive at high arrival rates but these introduce user delay, which can only be reduced by increasing the number of server streams. This paper proposes a new scheme, called batched multicast patching (BMP), which combines both reactive and proactive methods by multicasting patch streams to a batch of user requests for a video which is broadcast in a staggered manner. This scheme uses less number of server streams at both moderate and high arrival rates. The number of channels the client has to join concurrently is at most two. This scheme is less complex than other low user delay broadcasting protocols such as pyramid and harmonic broadcasting protocols.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127032627","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
A model-based error concealment method for scalable video 基于模型的可缩放视频错误隐藏方法
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341109
G. Feideropoulou, B. Pesquet-Popescu
{"title":"A model-based error concealment method for scalable video","authors":"G. Feideropoulou, B. Pesquet-Popescu","doi":"10.1109/ISSPIT.2003.1341109","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341109","url":null,"abstract":"Scalable video compression algorithms based on motion-compensated spatio-temporal wavelet decomposition have recently gained a lot of interest for video transmission over packet networks due to their flexibility and coding performance. Meanwhile, the adaptation of scalable video to the variations of the transmission conditions over the network could result in losing a part of the bitstream. In this paper we show that a statistical spatio-temporal model of the wavelet coefficients can be effective in the prediction of the lost subbands at the decoder side. Based on this analysis we propose an error concealment method and provide experimental results showing the quality improvement that can be achieved by using it.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127311819","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
On capacity and emission improvements by smart antennas in mixed traffic UMTS networks 基于智能天线的混合交通UMTS网络容量和发射改进研究
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341185
A. Dekorsy, M. Schacht, P. Jung
{"title":"On capacity and emission improvements by smart antennas in mixed traffic UMTS networks","authors":"A. Dekorsy, M. Schacht, P. Jung","doi":"10.1109/ISSPIT.2003.1341185","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341185","url":null,"abstract":"Apart from providing high system capacity it is essential for mobile communications systems as UMTS to operate with low electromagnetic emission. Smart antennas are one promising technology to establish exposure reduction while upholding system capacity requirements. In this context, the main objective of this paper is to assess the performance improvements of practically applicable beamforming concepts for UMTS networks. The concepts illuminated are fixed as well as adaptive beamforming. To obtain suitable assessments we especially attend three essential aspects. First, proper SINR modelling is considered including spatially formed inter-/intra-cell interference as well as pilot pollution prevailing UMTS networks. Special interest is secondly given on the interaction between UMTS specific radio-resource management algorithms as power-/load control and the smart antenna concepts considered. Finally, we investigate mixed data rate traffic which is expected for UMTS. The simulations are carried out utilizing a combination of UMTS physical and dynamic system level simulators.","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133570265","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
Towards the commit process of causal-ordered distributed real-time transactions 探讨因果顺序分布式实时事务的提交过程
Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795) Pub Date : 2003-12-14 DOI: 10.1109/ISSPIT.2003.1341189
L. Amanton, B. Sadeg, A. Berred
{"title":"Towards the commit process of causal-ordered distributed real-time transactions","authors":"L. Amanton, B. Sadeg, A. Berred","doi":"10.1109/ISSPIT.2003.1341189","DOIUrl":"https://doi.org/10.1109/ISSPIT.2003.1341189","url":null,"abstract":"The management of transactions is among the main issues to tackle in many current applications such as multimedia applications or visio-conferencing. Theses applications are often distributed over several sites, they manipulate large volumes of data and their actions have temporal constraints and are causally related. Therefore, DRT-DBSs/sup 1/ are the systems that manage them efficiently, notably if the transaction concurrency control and commit processes take into account the precedence relationships which might exist between transactions or subtransactions. In this paper, we propose causal-prompt protocol to manage the commit process of such transactions. We show that causal-prompt protocol respects certain transactions properties and enhances the real-time transaction success ratio (number of transactions that meet their deadlines/total number of transactions).","PeriodicalId":332887,"journal":{"name":"Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (IEEE Cat. No.03EX795)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134413648","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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