... IEEE Global Communications Conference. IEEE Global Communications Conference最新文献_第10页

Packet Loss Differentiation Using Network Layer Packet Redundancy in Optical Packet/Burst Switched Networks 基于网络层数据包冗余的光分组/突发交换网络丢包区分

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2009-11-30 DOI: 10.1109/GLOCOM.2009.5426312

Harald Ø verby

引用次数: 1

A Low-Complexity Beamforming-Based Scheduling for Downlink OFDMA/SDMA Systems with Multimedia Traffic 基于低复杂度波束形成的下行OFDMA/SDMA系统多媒体业务调度

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2009-11-30 DOI: 10.1109/GLOCOM.2009.5426219

Wen-Ching Chung, Li-Chun Wang, Chung-Ju Chang

引用次数: 7

Analyzing Two Conflicting Objectives of the WDM Lightpath Reconfiguration Problem WDM光路重构问题的两个冲突目标分析

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2009-01-01 DOI: 10.1109/GLOCOM.2009.5426108

F. S. Donado

引用次数: 2

Iterative Receiver Design with Joint Channel Estimation and Synchronization for Coded MIMO-OFDM over Doubly Selective Channels 双选择信道编码MIMO-OFDM联合信道估计与同步的迭代接收机设计

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2009-01-01 DOI: 10.1109/GLOCOM.2009.5425733

H. Nguyen-Le, T. Le-Ngoc, N. Tran

{"title":"Iterative Receiver Design with Joint Channel Estimation and Synchronization for Coded MIMO-OFDM over Doubly Selective Channels","authors":"H. Nguyen-Le, T. Le-Ngoc, N. Tran","doi":"10.1109/GLOCOM.2009.5425733","DOIUrl":"https://doi.org/10.1109/GLOCOM.2009.5425733","url":null,"abstract":"The paper introduces a turbo (iterative) receiver design for joint channel estimation, synchronization and soft decoding in convolutional-coded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems over timeand frequency-selective (doubly selective) channels. Employing the complex-exponential basis expansion model (CE-BEM) for representing doubly selective channels, a maximum likelihood (ML) objective function of carrier frequency offset (CFO) and MIMO time-varying channel responses (BEM coefficients) is formulated to develop a semiblind ML framework for joint time-variant channel estimation and synchronization. To reduce the overhead of pilot signals without sacrificing estimation accuracy, the soft bit information from a soft-input soft-output (SISO) decoder is exploited in computing soft estimates of data symbols to be functioned as pilots for further enhancing the estimation accuracy after CFO and channel acquisition phase (initial coarse estimation) using pilots. In other words, the resulting semi-blind ML estimation scheme operates in conjunction with soft decoding process in a (iteratively) progressive manner to exploit remarkable gains of turbo processing (iterative extrinsic information exchange). Simulation results show that the proposed turbo joint channel estimation and synchronization scheme offers high estimation accuracy that approaches Cramér-Rao lower bounds (CRLBs) over a wide range of CFO values under low signal-to-noise ratio (SNR) conditions.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"2 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85485578","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 New Cooperative Localization Method for UMTS Cellular Networks 一种新的UMTS蜂窝网络协同定位方法

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2008-12-08 DOI: 10.1109/GLOCOM.2008.ECP.458

F. Piccolo

{"title":"A New Cooperative Localization Method for UMTS Cellular Networks","authors":"F. Piccolo","doi":"10.1109/GLOCOM.2008.ECP.458","DOIUrl":"https://doi.org/10.1109/GLOCOM.2008.ECP.458","url":null,"abstract":"The ETSI/3GPP standardization body has defined a general location services (LCS) UMTS architecture which i) provides assistance data for mobile phones equipped with satellite navigation receivers and ii) is able to localize mobile phones not equipped with satellite navigation receivers or out of coverage. Nevertheless, the most of the already deployed systems for location-based services either assume that UMTS mobile phones are equipped with satellite navigation receivers and limit themselves to collect and transmit assistance data, or derive the position of mobile phones from the identifier of the serving cells. As the accuracy of methods based on cell identifiers depends on the size of the serving cell and it may drop to even few kilometers in case of macrocells, this paper considers the localization problem still unsolved for the UMTS mobile phones not equipped with satellite navigation receivers or out of coverage. To solve this problem, this paper proposes a new cooperative localization method for UMTS cellular networks. The idea arises from the observation that an ever increasing number of UMTS mobile phones will have an integrated satellite navigation receiver and will be able to position themselves. Thus, the proposed method consists in using the ETSI/3GPP LCS architecture to allow mobile phones without satellite navigation receivers or out of coverage to estimate their position by performing power measurements on signals emitted by mobile phones with satellite navigation receivers and known-position1.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"1 1","pages":"2383-2387"},"PeriodicalIF":0.0,"publicationDate":"2008-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83472771","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: 24

Generalized Differential Transmission for STBC Systems STBC系统的广义差动传输

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2008-01-01 DOI: 10.1109/GLOCOM.2008.ECP.836

Liangbin Li, Z. Fang, Y. Zhu, Zongxin Wang

引用次数: 0

RECHOKe: A Scheme for Detection, Control and Punishment of Malicious Flows in IP Networks RECHOKe:一种侦测、控制与惩罚IP网路中恶意流量的方案

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2007-12-26 DOI: 10.1109/GLOCOM.2007.11

V. Govindaswamy, G. Záruba, G. Balasekaran

引用次数: 23

EM Based Frequency-Dependent Transmit/Receive IQ Imbalance Estimationand Compensation in OFDM-Based Transceivers ofdm收发器中基于EM的频率相关收发IQ不平衡估计与补偿

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2007-11-01 DOI: 10.1109/GLOCOM.2007.813

Eduardo Lopez-Estraviz, L. Perre

{"title":"EM Based Frequency-Dependent Transmit/Receive IQ Imbalance Estimationand Compensation in OFDM-Based Transceivers","authors":"Eduardo Lopez-Estraviz, L. Perre","doi":"10.1109/GLOCOM.2007.813","DOIUrl":"https://doi.org/10.1109/GLOCOM.2007.813","url":null,"abstract":"Nowadays a lot of effort is spent on developing OFDM- based inexpensive wireless transceivers. Direct-conversion radio frequency transceivers are appealing because they avoid costly IF analog components. This kind of transceivers imply analog RF I/Q separation. The mismatch between the analog components in the in-phase and quadrature branches introduces an unwanted in-band interference. Unfortunately, OFDM-based systems are very sensitive to I/Q mismatch, mostly when high order mod- ulation schemes are applied. A digital compensation of this unwanted ef- fect is required. In this paper, we developed an iterative method for es- timating and compensating the transmitter/receiver frequency-dependent I/Q imbalance jointly with the propagation channel in the frequency do- main. The new estimation technique resorts to the iterative Expectation- Maximization algorithm in order converge to the ML estimation for both channel and IQ imbalance coefficients in presence of unknown transmitted data symbols. Although the the estimation may be perform in the absence of known pilot symbols, the algorithm provides flexibility in terms of pi- lot sequence, allocation and load in order to improve its convergence. An advanced low complexity equalizer is proposed which compensates for the frequency-dependent IQ imbalance. Simulation results show optimal per- formance even in the absence of any pilot symbol and large IQ mismatches. The proposed technique enables the system to achieve high SNRs.","PeriodicalId":72021,"journal":{"name":"... IEEE Global Communications Conference. IEEE Global Communications Conference","volume":"11 1","pages":"4274-4279"},"PeriodicalIF":0.0,"publicationDate":"2007-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87885714","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

Combined Cross Layer Design and HARQ for TDD Multiuser Systems with Outdated CSIT 陈旧CSIT下TDD多用户系统的组合跨层设计与HARQ

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2007-01-01 DOI: 10.1109/GLOCOM.2007.637

Rui Wang, V. Lau

引用次数: 0

Enabling Locality in a Balanced Peer-to-Peer Overlay 在平衡对等覆盖中启用局部性

... IEEE Global Communications Conference. IEEE Global Communications Conference Pub Date : 2006-01-01 DOI: 10.1109/GLOCOM.2006.244

N. Efthymiopoulos, Athanasios Christakidis, S. Denazis, O. Koufopavlou

引用次数: 5