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2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)最新文献

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Some algorithms for circadian rhythm identification 昼夜节律识别的一些算法
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953660
C. Zarowski, I. Kropyvnytskyy
{"title":"Some algorithms for circadian rhythm identification","authors":"C. Zarowski, I. Kropyvnytskyy","doi":"10.1109/PACRIM.2001.953660","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953660","url":null,"abstract":"We present two approaches to the detrending of physiological data derived from brain-injured human patients. This is important in circadian rhythym characterization. The proper identification of a patient's rhythm is known to be important in clinical treatment. One detrending approach is an ad hoc polynomial fitting strategy, while the other is a modification of the so-called cosinor model where subharmonic terms are added. The latter method is based on the fact that many nonlinear dynamic systems when driven with a sinusoidal input produce an output containing subharmonics of the input. The latter method seems to provide consistently superior performance to the polynomial method.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129758824","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
Design and performance analysis of a high speed AWGN communication channel emulator 高速AWGN通信信道仿真器的设计与性能分析
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953647
Adel Ghazel, Emmanuel Boutillon, J. Danger, Glenn Gulak, Hédi Laamari
{"title":"Design and performance analysis of a high speed AWGN communication channel emulator","authors":"Adel Ghazel, Emmanuel Boutillon, J. Danger, Glenn Gulak, Hédi Laamari","doi":"10.1109/PACRIM.2001.953647","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953647","url":null,"abstract":"A hardware white Gaussian noise generator (WGNG) is developed in an FPGA circuit for mobile communication channel emulation. High accuracy, fast and low-cost hardware are reached by combining the Box-Muller and central limit methods. The performance of the designed model is investigated using MATLAB. The complexity and the performance level are given for some configurations and show the interest of the proposed model.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128162428","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: 64
Selective filtering of spatio-temporal plane waves using 3D cone filter banks 利用三维锥滤波器组对时空平面波进行选择性滤波
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953524
L. Bruton
{"title":"Selective filtering of spatio-temporal plane waves using 3D cone filter banks","authors":"L. Bruton","doi":"10.1109/PACRIM.2001.953524","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953524","url":null,"abstract":"A 3D cone-shaped pass band is ideally required for the selective filtering of spatio-temporal plane waves on the basis of their directions of arrival. A method is proposed for approximating 3D cone-shaped pass bands using a 3D cone filter bank structure in which the bands consist of band limited 3D beam filters having 3D bandwidths that are approximately proportional to their distance from the origin in the 3D frequency space. The individual 3D beam filters way be realized from a cascade of stable 3D frequency planar filters, each of which corresponds to a passive stable 3D continuous-domain frequency-planar prototype filter.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129358266","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
Simplification on Log-MAP algorithm and its application in Rayleigh channel Log-MAP算法的简化及其在瑞利信道中的应用
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953565
Sen Jiang, Xiang-fang Su, Dong-liang Xiao, Hong Sun
{"title":"Simplification on Log-MAP algorithm and its application in Rayleigh channel","authors":"Sen Jiang, Xiang-fang Su, Dong-liang Xiao, Hong Sun","doi":"10.1109/PACRIM.2001.953565","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953565","url":null,"abstract":"A method to simplify the Log-MAP algorithm for turbo decoding by redefining the transition metric is proposed. It leads to a simpler and more accurate form of transition metric in Rayleigh channels.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129016878","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: 3
Buried heterostructure lasers for metropolitan area networks: anomalous low temperature behaviour 城域网埋入异质结构激光器:异常低温行为
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953650
D. Ban, E. Sargent
{"title":"Buried heterostructure lasers for metropolitan area networks: anomalous low temperature behaviour","authors":"D. Ban, E. Sargent","doi":"10.1109/PACRIM.2001.953650","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953650","url":null,"abstract":"Buried heterostructure (BH) lasers are key sources for optical fibre communication systems and integrated optoelectronics. We have initiated a study of the low-temperature behaviour of these lasers with a view to gaining insight into the mechanisms which limit their performance as directly modulated sources for optical communications systems. In particular, we have focussed on the effect of quantum transport bottlenecking during ambipolar injection across quantum wells, a mechanism widely viewed as responsible for limiting these lasers to operating below their ultimate modulation bandwidth.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121461770","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
Performance evaluation of error-resilient mechanisms for MPEG-4 video communications over wireless ATM links 无线ATM链路上MPEG-4视频通信容错机制的性能评估
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953669
F. Delicado, P. Cuenca, L. Orozco-Barbosa, A. Garrido, F. Quiles
{"title":"Performance evaluation of error-resilient mechanisms for MPEG-4 video communications over wireless ATM links","authors":"F. Delicado, P. Cuenca, L. Orozco-Barbosa, A. Garrido, F. Quiles","doi":"10.1109/PACRIM.2001.953669","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953669","url":null,"abstract":"In the last years, the deployment of wireless networks and the development of multimedia applications have spurred the need for reliable transmission of mixed media information over wireless links. The use of ATM-based wireless links may partially address the need of a communications infrastructure capable of meeting the QoS expectations of a wide variety of applications. The deployment of a reliable and efficient multimedia communications services over wireless links face two major constraints: the limited bandwidth availability of wireless links imposes severe constraints to the deployment o advanced multimedia applications. The second constraint refers to the high error channel rates. For these reasons, the effective transmission of video over a wireless channel requires no only the use of compression techniques capable of reducing the bandwidth demands, but also the use of video compression comprising error resilience capabilities. The ISO MPEG-4 video compression standard has been developed to fulfill these two properties. In this paper, we study the effectiveness of the MPEG-4 compression video standard error resilience techniques over a wireless channel.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115647447","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
TAT: traffic analysis tool for the statistical study of IP networks TAT:用于IP网络统计研究的流量分析工具
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953699
J. Malgosa-Sanahuja, M. Cano, F. Cerdán, J. García-Haro
{"title":"TAT: traffic analysis tool for the statistical study of IP networks","authors":"J. Malgosa-Sanahuja, M. Cano, F. Cerdán, J. García-Haro","doi":"10.1109/PACRIM.2001.953699","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953699","url":null,"abstract":"We present a new software package, TAT, that allows the statistical study of the IP traffic transmitted through an Internet node. This tool has been successfully tested under work carried out in a subnet of the regional network of Murcia (Spain) called Ciez@net. Cieza is a town of 30,000 people where the pilot network Ciez@net intends to give these people the opportunity to use the new emerging Internet applications in their daily life. The goal of the traffic analysis tool developed in this project has been to analyse the IP traffic transmitted in the regional network in order to figure out if the use that people make of the network services and infrastructure was worth the economic effort put into the network deployment and operation. The success of this software tool lies in its flexibility, easy handling and interface independence.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"431 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113998065","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
On choice of impulse response length in channel identification 信道识别中脉冲响应长度的选择
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953646
S. Beheshti, M. Dahleh
{"title":"On choice of impulse response length in channel identification","authors":"S. Beheshti, M. Dahleh","doi":"10.1109/PACRIM.2001.953646","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953646","url":null,"abstract":"A new approach to the problem of estimating length of a channel impulse response is presented. Unlike the information theoretic approaches, the new method examines the unmodeling effect explicitly and independent of the additive noise effect.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126990779","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
Smooth loss with variability smoothing factor to increase bandwidth utilization 平滑损耗与可变性平滑因子，以提高带宽利用率
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953677
B. Piyatamrong, P. Piyakhun
{"title":"Smooth loss with variability smoothing factor to increase bandwidth utilization","authors":"B. Piyatamrong, P. Piyakhun","doi":"10.1109/PACRIM.2001.953677","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953677","url":null,"abstract":"As the rapid growth of the Internet data streaming the TCP and UDP protocols could not efficiently utilize and share bandwidth for the data streaming. There are many techniques to improve a transmission data stream to archive multimedia data. The adaptive transmission control using smoothed loss is a technique that controls the transmission rate to an appropriate network condition. This paper improves this technique by using a variability smoothing factor which can improve the transmission rate in the whole transmission. Simulations are used to study an adaptive behavior of the adaptive transmission control procedure. The results of experiment shows that a rate adaptive control procedure can increase the transmission rate by using a variability smoothing factor.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132627119","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
Wireless IP network architecture for cdma2000 cdma2000无线IP网络架构
2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233) Pub Date : 2001-08-26 DOI: 10.1109/PACRIM.2001.953642
Woou Lee, D.J.Y. Lee
{"title":"Wireless IP network architecture for cdma2000","authors":"Woou Lee, D.J.Y. Lee","doi":"10.1109/PACRIM.2001.953642","DOIUrl":"https://doi.org/10.1109/PACRIM.2001.953642","url":null,"abstract":"In the industry trend toward third generation (3G) cellular systems, a great deal of emphasis has been placed on packet based transport, especially by adapting the Internet Protocol. At the same time, there is a trend across the communications industry to converge voice and data at the transport level. The interests of the major players are accelerating the development of new standards and availability of new products to support the benefits of convergence. It is now possible to employ existing VoIP technology solutions currently available to provide CDMA systems that are based on third generation system architectures. This paper discusses the migration from fundamentally circuit switched solutions for wireless voice toward packet switched, IP based solutions for cdma2000 system.","PeriodicalId":261724,"journal":{"name":"2001 IEEE Pacific Rim Conference on Communications, Computers and Signal Processing (IEEE Cat. No.01CH37233)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131903945","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
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