2007 Information Theory and Applications Workshop最新文献_第6页

From Information Rate Computation to Communication System Design 从信息率计算到通信系统设计

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357599

M. Franceschini, R. Pighi, G. Ferrari, R. Raheli

引用次数: 3

Delay-Constrained Energy Efficient Data Transmission over a Wireless Fading Channel 基于无线衰落信道的时延约束节能数据传输

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357594

M. Zafer, E. Modiano

引用次数: 69

The Gaussian multiple access wire-tap channel: wireless secrecy and cooperative jamming 高斯多址有线监听信道:无线保密与协同干扰

2007 Information Theory and Applications Workshop Pub Date : 2007-02-08 DOI: 10.1109/ITA.2007.4357611

Ender Tekin, A. Yener

{"title":"The Gaussian multiple access wire-tap channel: wireless secrecy and cooperative jamming","authors":"Ender Tekin, A. Yener","doi":"10.1109/ITA.2007.4357611","DOIUrl":"https://doi.org/10.1109/ITA.2007.4357611","url":null,"abstract":"We consider the general Gaussian multiple access wire-tap channel (GGMAC-WT). In this scenario, multiple users communicate with an intended receiver in the presence of an intelligent and informed eavesdropper. We define two suitable secrecy measures, termed individual and collective, to reflect the confidence in the system for this multi-access environment. We determine achievable rates such that secrecy to some predetermined degree can be maintained, using Gaussian codebooks. We also find outer bounds for the case when the eavesdropper receives a degraded version of the intended receiver's signal. In the degraded case, Gaussian codewords are shown to achieve the sum capacity for collective constraints. In addition, a TDMA scheme is shown to also achieve sum capacity for both sets of constraints. Numerical results showing the new rate region are presented and compared with the capacity region of the Gaussian multiple-access channel (GMAC) with no secrecy constraints. We then find the secrecy sum-rate maximizing power allocations for the transmitters, and show that a cooperative jamming scheme can be used to increase achievable rates in this scenario.","PeriodicalId":439952,"journal":{"name":"2007 Information Theory and Applications Workshop","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114883751","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: 47

Searching for low weight pseudo-codewords 搜索低权重伪码字

2007 Information Theory and Applications Workshop Pub Date : 2007-02-04 DOI: 10.1109/ITA.2007.4357567

M. Chertkov, M. Stepanov

引用次数: 4

Parametrized Stochastic Grammars for RNA Secondary Structure Prediction RNA二级结构预测的参数化随机语法

2007 Information Theory and Applications Workshop Pub Date : 2007-01-24 DOI: 10.1109/ITA.2007.4357589

Robert S. Maier

引用次数: 5

Multiuser Water-filling in the Presence of Crosstalk 存在串音的多用户充水

2007 Information Theory and Applications Workshop Pub Date : 2007-01-01 DOI: 10.1109/ITA.2007.4357612

Wei Yu

{"title":"Multiuser Water-filling in the Presence of Crosstalk","authors":"Wei Yu","doi":"10.1109/ITA.2007.4357612","DOIUrl":"https://doi.org/10.1109/ITA.2007.4357612","url":null,"abstract":"Spectrum optimization is an important part of the design of interference-limited multiuser communication systems. While traditional water-filling provides a closed-form solution to the transmit optimization problem in a single-user system, the multiuser version of the problem often leads to nonconvex problem formulations which are difficult to solve. Motivated by high-speed parallel-link and digital subscriber line applications, this paper investigates two practical multiuser settings in which global or local optimal solutions to the multiuser spectrum optimization problems can be found efficiently. The first part of this paper considers a high-speed transmission system in which practical (but suboptimal) minimum-mean-squared-error linear equalizers (MMSE-LEs) are used at the receiver. The optimal single-user transmit spectrum in this case involves a modified water-filling solution. Surprisingly, such a modified water-filling spectrum can be shown to be near-optimal in a multiuser setting as well, if the direct-link and the crosstalk characteristics are symmetric and if crosstalk is reasonably small. Thus, for practical parallel-link systems using MMSE linear equalizers, the optimal single-user and multiuser spectra are nearly identical. The second part of this paper considers numerical techniques for solving a nonconvex multiuser rate maximization problem for digital subscriber line applications. A new ingredient in the proposed approach is a taxation scheme that takes into account the effect of interference between neighboring lines. This leads to a modified iterative water-filling algorithm which is capable of finding local optimum solutions to the multiuser spectrum optimization problem efficiently.","PeriodicalId":439952,"journal":{"name":"2007 Information Theory and Applications Workshop","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121778565","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: 173

On Cooperative Lattice Coding and Decoding 合作格编码与译码

2007 Information Theory and Applications Workshop Pub Date : 2006-02-13 DOI: 10.1109/ITA.2007.4357558

Arul D. Murugan, K. Azarian, H. E. Gamal

引用次数: 18

Design and Analysis of Low-Density Parity-Check Codes for Block-Fading Channels 块衰落信道低密度奇偶校验码的设计与分析

2007 Information Theory and Applications Workshop Pub Date : 1900-01-01 DOI: 10.1109/ITA.2007.4357562

J. Boutros, A. G. Fàbregas, E. Biglieri, Gilles Zémor

引用次数: 28