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GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)最新文献

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On binary code design for the noncoherent block fading channel 非相干块衰落信道的二进制码设计
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258508
P. Papadimitriou, C. Georghiades
{"title":"On binary code design for the noncoherent block fading channel","authors":"P. Papadimitriou, C. Georghiades","doi":"10.1109/GLOCOM.2003.1258508","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258508","url":null,"abstract":"In this paper, we study the binary code design problem for the fading channel with noncoherent maximum-likelihood detection. The /spl rho/-spectrum (i.e. all possible pairwise absolute cross-correlations) provides a way to define the optimal codes, based on the union bound on the error probability, as the codes achieving the optimal /spl rho/-spectrum for some code rate. We introduce some limited search methods based on the /spl rho/-spectrum, including a nested search, which for some code rates yields optimal codes. With our nested search, good codes were obtained easily up to code rate 12/n, n/spl les/4096. The codes developed offer good performance in the fading channel and can be used in place of the Hadamard-Walsh codes in synchronous CDMA systems to increase system capacity.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125867327","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: 8
Extended concept of statistical lambda multiplexing network (SLAMNet) 统计lambda多路复用网络(SLAMNet)的扩展概念
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258730
Hajime Nakamura, H. Yokoyama, S. Nomoto
{"title":"Extended concept of statistical lambda multiplexing network (SLAMNet)","authors":"Hajime Nakamura, H. Yokoyama, S. Nomoto","doi":"10.1109/GLOCOM.2003.1258730","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258730","url":null,"abstract":"The basic concept of a novel architecture called statistical lambda multiplexing network (SLAMNet) was proposed to provide a pair of routers with multiple transparent wavelength paths in a dense wavelength division multiplexing (DWDM) network. The architecture achieves statistical multiplex gain in use of limited wavelength resources by dynamically adjusting the number of wavelength paths according to the volume of traffic on a best-effort basis. The most striking feature of the architecture is to switch the wavelength paths without signaling between nodes operated asynchronously. Fundamental performance of the architecture was verified on an experimental system. The basic concept assumes a single hop network of switched wavelength paths, and the assumption limits flexibility and efficiency of network operation. In this paper, the basic concept is extended in order to apply SLAMNet to a multihop network of switched wavelength paths. Based on the extended concept, circuit-based and burst-based wavelength path assignment methods are discussed as implementation scenarios of the architecture.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125978562","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
Path delay model based on /spl alpha/-stable distribution for the 60 GHz indoor channel 基于/spl alpha/-稳定分布的60ghz室内信道路径延迟模型
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258515
Nourddine Azzaoui, L. Clavier, R. Sabre
{"title":"Path delay model based on /spl alpha/-stable distribution for the 60 GHz indoor channel","authors":"Nourddine Azzaoui, L. Clavier, R. Sabre","doi":"10.1109/GLOCOM.2003.1258515","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258515","url":null,"abstract":"In this work we give a statistical model of the paths' arrival time in the 60 GHz wide band channel. This model is based on the class of stable distributions, we show its accurateness on modeling real data. We also give a theoretical justification of its compatibility.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126191544","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
Mode detection, synchronization, and channel estimation for DVB-T OFDM receiver DVB-T OFDM接收机的模式检测、同步和信道估计
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258670
Shiou-Hong Chen, Way-Hong He, Hou-Shin Chen, Yumin Lee
{"title":"Mode detection, synchronization, and channel estimation for DVB-T OFDM receiver","authors":"Shiou-Hong Chen, Way-Hong He, Hou-Shin Chen, Yumin Lee","doi":"10.1109/GLOCOM.2003.1258670","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258670","url":null,"abstract":"A baseband receiver for DVB-T OFDM with variable number of subcarriers is presented in this paper. The proposed receiver consists of a blind mode detector, time and frequency synchronizer, and channel estimator. The blind mode detector uses a novel algorithm to detect the number of OFDM subcarriers in the received signal. Time and frequency synchronization is performed after the transmission mode is detected. Finally, channel estimation is performed using ID or 2D interpolation. Simulation results show that the proposed mode detection and synchronization algorithms are close to ideal, and good overall performance is achievable.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"302 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129425985","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: 32
Bootstrap frequency equalisation for MIMO wireless systems MIMO无线系统的自举频率均衡
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1259013
R. Piechocki, C. Kasparis, A. Nix, P. Fletcher, J. McGeehan
{"title":"Bootstrap frequency equalisation for MIMO wireless systems","authors":"R. Piechocki, C. Kasparis, A. Nix, P. Fletcher, J. McGeehan","doi":"10.1109/GLOCOM.2003.1259013","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1259013","url":null,"abstract":"The paper reports on a new class of equalisation/detection for wideband multiple input-multiple output (MIMO) communications systems. The proposed scheme is somewhat akin to a multi-carrier MIMO system, and more precisely, builds upon a single carrier frequency domain equalised (SCFDE) MIMO system. At the core of our system lies a novel concept of iterative self-reused equalisation/detection (bootstrapping) combined with semi-hard decision making. The bootstrapping concept is derived from a new formulation of Tikhonov regularisation. The proposed scheme achieves a remarkable performance/complexity trade-off. In particular we show that our system approaches the performance of ML-MIMO-OFDM while being only slightly more complex than MMSE-MIMO-OFDM. The coded version achieves virtually the same performance as turbo MIMO-OFDM at a fraction of the complexity. The resulting system is termed zero tailed bootstrap frequency equalised (ZTBFE) MIMO system.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129452210","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
Fast packet classification using field-level trie 使用字段级trie的快速数据包分类
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258827
Guansong Zhang, H. J. Chao, Jinoo Joung
{"title":"Fast packet classification using field-level trie","authors":"Guansong Zhang, H. J. Chao, Jinoo Joung","doi":"10.1109/GLOCOM.2003.1258827","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258827","url":null,"abstract":"Packet classification plays an important role in next-generation Internet routers in providing various services such as packet filtering, policy routing, traffic policing, and load balancing. In this paper, we propose an original field-level trie classification (FLTC) scheme that accommodates classifier (rule database) with multiple fields specified in different forms (prefix and range). The FLTC achieves a high classification speed with reasonable storage. It is also highly scalable regarding the size and the number of fields of classifiers.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128357548","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: 10
Design of a robust self-adapt DCF-based protocol 基于dcf的鲁棒自适应协议设计
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258230
Yong Peng, Shiduan Cheng, Yu Lin
{"title":"Design of a robust self-adapt DCF-based protocol","authors":"Yong Peng, Shiduan Cheng, Yu Lin","doi":"10.1109/GLOCOM.2003.1258230","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258230","url":null,"abstract":"Numerous researches have shown that the original DCF access mode of IEEE 802.11 has low performance in case of heavy traffic environment. Based on the analysis of previous IEEE 802.11 DCF, we have proposed a parameter that closely relative to the traffic load of the current wireless LAN and formed a new DCF-based protocol with the name of NSAD (new self-adapt DCF-based protocol). NSAD is proved effective in the error-free environment. In this paper, we proposed some new mechanisms to further enhance the performance of NSAD and formed a new MAC mechanism RSAD (robust self-adapt DCF-based protocol). We have done simulation in a more real environment than we do in NSAD. The simulation results have shown that the proposed RSAD can achieve better performance when compared with the original NSAD algorithm in an error-prone environment (e.g. better property in goodput and window tuning accuracy).","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"31 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128649011","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
Timing acquisition for wavelet-based multirate transmissions 基于小波的多速率传输定时采集
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258627
Chih-Ming Fu, W. Hwang, Chung-Lin Huang
{"title":"Timing acquisition for wavelet-based multirate transmissions","authors":"Chih-Ming Fu, W. Hwang, Chung-Lin Huang","doi":"10.1109/GLOCOM.2003.1258627","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258627","url":null,"abstract":"The acquisition problem in wavelet-based modulation is very important. We discuss the problem of the ML-based method proposed by M. Luise et al. (see IEEE Trans. Commun., vol.48, p.1047-54, 2000) for timing acquisition and then we develop a novel acquisition algorithm. Our method uses the properties of the scaling function in the derivation of the acquisition function. We also show that the S-curve of our acquisition algorithm is smooth and has a unique zero during the signaling interval. Thus, we can acquire the correct symbol timing without ambiguity. The performance of our acquisition algorithm is evaluated by Monto-Carlo simulation using the Meyer wavelet.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128676284","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
PD-controller: a new active queue management scheme PD-controller:一种新的主动队列管理方案
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258806
Jinsheng Sun, Guanrong Chen, K. Ko, Sammy Chan, M. Zukerman
{"title":"PD-controller: a new active queue management scheme","authors":"Jinsheng Sun, Guanrong Chen, K. Ko, Sammy Chan, M. Zukerman","doi":"10.1109/GLOCOM.2003.1258806","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258806","url":null,"abstract":"This paper describes a proportional-differential (PD) control algorithm as a new active queue management (AQM) scheme for TCP/IP congestion control. From the viewpoint of the control theory, TCP congestion control system can be regarded as a feedback regulating system. In this paper, a robust AQM called PD-controller is proposed. The design principles of PD-controller are presented in details. Its performance is extensively evaluated by simulations. The results demonstrate that the PD-controller AQM is stable and robust against traffic load fluctuations, UDP and HTTP disturbances. Its superiority over other AQMs is also demonstrated.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129673777","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: 86
Flexible architecture software radio OFDM transceiver system and frame synchronization analysis 柔性架构软件无线电OFDM收发系统及帧同步分析
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489) Pub Date : 2003-12-01 DOI: 10.1109/GLOCOM.2003.1258256
K. Nolan, P. Mackenzie, L. Doyle, D. Flood
{"title":"Flexible architecture software radio OFDM transceiver system and frame synchronization analysis","authors":"K. Nolan, P. Mackenzie, L. Doyle, D. Flood","doi":"10.1109/GLOCOM.2003.1258256","DOIUrl":"https://doi.org/10.1109/GLOCOM.2003.1258256","url":null,"abstract":"In this paper, we present findings relating to frame synchronization algorithms for software radio based OFDM systems in addition to an overview of the design and implementation of an (OFDM) software radio based on a general-purpose processor (GPP) platform. The objectives of this work are to advance on existing research carried out in the area of reconfigurable wireless flexible architecture nodes, which are subject to multipath fading, Doppler effects, and adjacent channel interference and have low cost yet robust and reliable operation requirements. We also include findings dealing with bit error rate (BER) versus channel signal to noise ratio (SNR) for BPSK and QPSK modulation schemes, and also the effect of non real-time operating systems (OS) running on GPPs on the transmitter processing time.","PeriodicalId":301154,"journal":{"name":"GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129740293","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
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