GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.最新文献_第5页

Channel estimation and data detection with tracking channel variation in MIMO system using ZF-based SAGE algorithm 基于zf - SAGE算法的MIMO系统信道估计和跟踪信道变化的数据检测

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-12-01 DOI: 10.1109/GLOCOM.2005.1578298

Takao Someya, T. Ohtsuki

{"title":"Channel estimation and data detection with tracking channel variation in MIMO system using ZF-based SAGE algorithm","authors":"Takao Someya, T. Ohtsuki","doi":"10.1109/GLOCOM.2005.1578298","DOIUrl":"https://doi.org/10.1109/GLOCOM.2005.1578298","url":null,"abstract":"In recent years, multiple-input multiple-output (MIMO) systems, which use several transmit and receive antennas, have attracted much attention for high performance radio systems. In MIMO systems, the channel estimation is important to distinguish transmit signals from multiple transmit antennas. While the space-alternating generalized expectation-maximization (SAGE) algorithm is known to offer good channel estimation and data detection. We proposed earlier the minimum mean square error (MMSE)-based SAGE algorithm for MIMO systems where the MMSE estimation is used for channel estimation. We showed that the proposed MMSE-based SAGE algorithm can achieve the better bit error rate (BER) than the maximum likelihood (ML) detection with training symbols. The MMSE channel estimation needs the knowledge of the maximum Doppler frequency Fd for deriving the covariance matrix of the channel and the variance sigma2 of additive white Gaussian noise (AWGN). Additionally, the computation of the MMSE channel estimation requires O(L3) operations where L is the transmitted frame length. Thus, its computational complexity is high. In this paper, we propose a zero-forcing (ZF)-based SAGE algorithm for channel estimation and data detection in MIMO systems that does not need the knowledge of Fd and sigma2. Since the computation of the proposed ZF-based SAGE algorithm requires O(N3) operations where N is the number of transmit antennas, its computational complexity is low. We show that the proposed ZF-based tracking SAGE algorithm with less computational complexity can achieve almost the same BER as that of the MMSE-based tracking SAGE algorithm","PeriodicalId":319736,"journal":{"name":"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.","volume":"2012 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114548707","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

Non-coherent distributed space-time processing for multiuser cooperative transmissions 多用户协同传输的非相干分布式时空处理

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-12-01 DOI: 10.1109/GLOCOM.2005.1578469

Tairan Wang, Yingwei Yao, G. Giannakis

引用次数: 18

Throughput maximization transmission control scheme using channel prediction for MIMO systems 基于信道预测的MIMO系统吞吐量最大化传输控制方案

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-12-01 DOI: 10.1109/GLOCOM.2005.1578082

Yoshikazu Takei, T. Ohtsuki

引用次数: 3

Multicast tree in MPLS network MPLS网络中的组播树

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1577790

A. Boudani, Bernard A. Cousin

引用次数: 10

Currency boosts content dissemination in noncooperative ad-hoc networks 货币促进了非合作ad-hoc网络中的内容传播

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1578263

Kyunghan Lee, S. Chong

引用次数: 0

Integrated congestion-control mechanism in optical burst switching networks 光突发交换网络中的集成拥塞控制机制

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1578011

Sungchang Kim, B. Mukherjee, Minho Kang

{"title":"Integrated congestion-control mechanism in optical burst switching networks","authors":"Sungchang Kim, B. Mukherjee, Minho Kang","doi":"10.1109/GLOCOM.2005.1578011","DOIUrl":"https://doi.org/10.1109/GLOCOM.2005.1578011","url":null,"abstract":"Optical burst switching (OBS) is a promising solution to implement the optical Internet backbone. However, the lack of adequate congestion-control mechanisms may result in high burst loss. Schemes such as fiber delay line (FDL), wavelength conversion, and deflection routing to reduce burst collision are unable to prevent the network congestion effectively. To address this problem, we propose and investigate a global solution, called integrated congestion-control mechanism (ICCM), for OBS networks. ICCM, which combines congestion avoidance with recovery mechanism, restricts the amount of burst flows entering the network according to the feedback information from core routers to edge routers to prevent network congestion. Also, a flow-policing scheme is proposed to intentionally drop the overloaded traffic with a certain probability at a core router to support fairness among flows. Moreover, the transmission rate of each flow is controlled to achieve optimized performance such as maximizing throughput or minimizing loss probability using a two-step rate controller at the edge router. Simulation results show that ICCM effectively eliminates congestion within the network and that, when combined with a flow-policing mechanism, the fairness for competing flows can be supported while maintaining effective network performance","PeriodicalId":319736,"journal":{"name":"GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.","volume":"612 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123265590","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: 6

Antenna partitioning for multiuser MIMO-CDMA MIMO-CDMA多用户天线划分

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1577908

Wan Choi, J. Andrews, R. Heath

引用次数: 1

Application layer addressing, routing and naming framework for overlays 覆盖层的应用层寻址、路由和命名框架

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1577774

D. Magoni, P. Lorenz

引用次数: 3

A posteriori Rake finger selection in space-time coded CDMA systems 时空编码CDMA系统中的后验耙指选择

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-28 DOI: 10.1109/GLOCOM.2005.1578340

S. Kim, E. Y. Kim

引用次数: 0

Accurate evaluation of packet error probabilities considering bit-to-bit error dependence 考虑到位对位错误依赖的数据包错误概率的准确评估

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005. Pub Date : 2005-11-14 DOI: 10.1109/GLOCOM.2005.1578212

K. Hamdi, L. Pap, E. Alsusa

引用次数: 3