2008 IEEE International Symposium on Information Theory最新文献_第10页

Analysis of outage capacity performance for cooperative DF and AF relaying in dissimilar Rayleigh fading channels 不同瑞利衰落信道下协同DF和AF中继的中断容量性能分析

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595035

S. Shrestha, K. Chang

引用次数: 34

Ergodic capacity and average rate-guaranteed scheduling for wireless multiuser OFDM systems 无线多用户OFDM系统的遍历容量和平均速率保证调度

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595276

Xin Wang, G. Giannakis

{"title":"Ergodic capacity and average rate-guaranteed scheduling for wireless multiuser OFDM systems","authors":"Xin Wang, G. Giannakis","doi":"10.1109/ISIT.2008.4595276","DOIUrl":"https://doi.org/10.1109/ISIT.2008.4595276","url":null,"abstract":"The challenging task of scheduling multi-user orthogonal frequency-division multiplexed transmissions amounts to jointly optimum allocation of subcarriers, rate and power resources. The optimization problem for deterministic channels reduces to an integer program known to be exponentially complex. Interestingly, the present paper shows that almost surely optimal allocation is possible at low complexity in the wireless setup, provided that the random fading channel has continuous distribution function. Specifically, it is established that the ergodic capacity achieving allocation follows a greedy water-filling scheme with linear complexity in the number of users and subcarriers. The result extends to accommodate fairness through general utility functions and constraints on the minimum average user rates. When the channel distribution is known, the optimal on-line scheme relies on low-complexity provably convergent subgradient iterations to obtain pertinent dual variables off line. To accommodate channel uncertainties, stochastic subgradient iterations provide dual variables on line with guaranteed convergence to their off-line counterparts.","PeriodicalId":194674,"journal":{"name":"2008 IEEE International Symposium on Information Theory","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115697023","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: 23

Asymmetric Gaussian multiple descriptions and asymmetric multilevel diversity coding 非对称高斯多重描述与非对称多电平分集编码

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595338

S. Mohajer, C. Tian, S. Diggavi

{"title":"Asymmetric Gaussian multiple descriptions and asymmetric multilevel diversity coding","authors":"S. Mohajer, C. Tian, S. Diggavi","doi":"10.1109/ISIT.2008.4595338","DOIUrl":"https://doi.org/10.1109/ISIT.2008.4595338","url":null,"abstract":"We consider asymmetric multiple description (MD) source coding for Gaussian source under mean squared error distortion constraints, and focus on the three description problem. Inner and outer bounds for the rate region are derived, both of which can be represented as the intersection of ten half spaces with matching normal directions. Moreover, the gap between the inner and outer bounds is shown to be small. The inner bound relies on the rate region characterization of a lossless asymmetric multilevel diversity (MLD) coding problem treated in our earlier work, which is a natural generalization of the symmetric MLD coding problem previously considered by Roche et al. Different from symmetric MLD coding, superposition coding is not sufficient in the asymmetric case, and ideas akin to network coding need to be used strategically. Equipped with this finding, and motivated by the connection between symmetric MD and symmetric MLD coding, in this work we consider asymmetric MD as a lossy version of the asymmetric MLD coding, which requires coding beyond simple superposition. An outer bound is also derived, which bears a geometric structure particularly suitable for comparison with the inner bound. Combining the inner and outer bounds provides an approximate characterization of the rate region for the asymmetric Gaussian three description problem.","PeriodicalId":194674,"journal":{"name":"2008 IEEE International Symposium on Information Theory","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114246211","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

Framework and algorithms for collaborative compression 协同压缩的框架和算法

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595404

K. Viswanathan, R. Swaminathan

引用次数: 0

On the effective capacities of multiple-antenna Gaussian channels 多天线高斯信道的有效容量研究

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595458

Lingjia Liu, J. Chamberland

{"title":"On the effective capacities of multiple-antenna Gaussian channels","authors":"Lingjia Liu, J. Chamberland","doi":"10.1109/ISIT.2008.4595458","DOIUrl":"https://doi.org/10.1109/ISIT.2008.4595458","url":null,"abstract":"The concept of effective capacity offers a novel methodology to investigate the impact that design decisions at the physical layer may have on system performance at the link layer. Assuming a constant flow of incoming data, the effective capacity characterizes the maximum arrival rate that a wireless system can support as a function of its service requirements. Service requirements in this framework are defined in terms of the asymptotic decay-rate of buffer occupancy. This article studies the effective capacity of a class of multiple-antenna wireless systems subject to Rayleigh flat fading. The effective capacity of the multi-antenna Gaussian channel is characterized, and system performance is evaluated in the low signal-to-noise ratio regime. Additional to the power gain of the multiple receive antenna system, we show that there is a statistical gain associated with a multiple transmit antenna system. When the number of transmit and/or receive antennas becomes large, the effective capacity of the system is bounded away from zero, even under very stringent service constraints. This phenomena, which results from channel-hardening, suggests that a multiple-antenna configuration is especially beneficial to delay-sensitive traffic.","PeriodicalId":194674,"journal":{"name":"2008 IEEE International Symposium on Information Theory","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117269317","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: 79

Convolutional Tanner structures for non-ergodic wireless channels 非遍历无线信道的卷积坦纳结构

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595170

J. Boutros, E. Viterbo, G. Cohen

引用次数: 0

Divisibility properties of Kloosterman sums over finite fields of characteristic two 特征二有限域上Kloosterman和的可整除性

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595463

P. Charpin, T. Helleseth, V. Zinoviev

引用次数: 15

An information-theoretic measure for the computational fidelity of physical processes 物理过程计算保真度的一种信息理论度量

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595412

N. Anderson

引用次数: 3

Performance analysis of incremental relaying with relay selection and adaptive modulation over non-identically distributed cooperative paths 非同分布协作路径上具有中继选择和自适应调制的增量中继性能分析

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595478

Kyu-Sung Hwang, Young-Chai Ko, Mohamed-Slim Alouini

引用次数: 20

Rate loading in OFDM based on bit-level capacities OFDM中基于位级容量的速率加载

2008 IEEE International Symposium on Information Theory Pub Date : 2008-07-06 DOI: 10.1109/ISIT.2008.4595199

C. Stierstorfer, R. Fischer

引用次数: 9