2007 Information Theory and Applications Workshop最新文献

Uncoded transmission is exactly optimal for a simple Gaussian "sensor" network 对于一个简单的高斯“传感器”网络，无编码传输是最优的

2007 Information Theory and Applications Workshop Pub Date : 2008-11-01 DOI: 10.1109/TIT.2008.929967

M. Gastpar

引用次数: 281

When Is Differential Detection Optimum for Ideal and Partially Coherent Reception/Demodulation of M-PSK? 什么时候差分检测最适合M-PSK的理想和部分相干接收/解调?

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357572

M. Simon, D. Divsalar

{"title":"When Is Differential Detection Optimum for Ideal and Partially Coherent Reception/Demodulation of M-PSK?","authors":"M. Simon, D. Divsalar","doi":"10.1109/ITA.2007.4357572","DOIUrl":"https://doi.org/10.1109/ITA.2007.4357572","url":null,"abstract":"We investigate the low SNR behavior of the optimum MAP sequence (blockwise) detection metric for ideal and partially coherent detection of differentially encoded M- PSK modulation. In particular, we show that based on an observation of N ges 2 symbols in the presence of a phase ambiguity introduced by the carrier tracking loop and assumed to be constant over the observation, this optimum coherent metric approaches that of multiple symbol differential detection (MSDD) asymptotically as the SNR approaches zero. More importantly, we show that for practical low SNR applications (e.g., error-correction coded systems), the region of SNR where the optimum coherent metric becomes synonymous with MSDD grows with the modulation order M. Finally, we consider the MSDD metric itself modified for symbol-by-symbol detection and demonstrate that for sufficiently low SNR (asymptotically as the SNR approaches zero), its behavior is equivalent to conventional (N = 2) differential detection, i.e., no gain to be had be extending the observation interval beyond two symbols. Unfortunately, unlike the sequence detection case, here the SNR region of validity of the low SNR approximation does not increase with increasing modulation order M.","PeriodicalId":439952,"journal":{"name":"2007 Information Theory and Applications Workshop","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125613780","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

On Universal Coding of Unordered Data 无序数据的通用编码

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357578

L. Varshney, V. K. Goyal

引用次数: 10

A Comparison of ARA- and Protograph-Based LDPC Block and Convolutional Codes 基于ARA和protograph的LDPC块码和卷积码的比较

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357569

D. Costello, A. E. Pusane, C.R. Jones, D. Divsalar

引用次数: 16

Information Theoretic Distance Measures in Phylogenomics 系统基因组学中的信息理论距离测度

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357613

P. Hanus, J. Dingel, Juergen Zecht, J. Hagenauer, Jakob C. Mueller

引用次数: 4

Comments on Why Generalized BP Serves So Remarkably in 2-D Channels 关于广义BP在二维通道中如此显著的原因的评论

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357604

O. Shental, N. Shental, S. Shamai, I. Kanter, A. Weiss, Y. Weiss

引用次数: 0

Less naive Bayes spai detection 更少的朴素贝叶斯检测

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357608

Hongming Yang, Maurice Stassen, Tjalling Tjalkens

引用次数: 0

Capacity regions for linear and abelian network codes 线性和阿贝尔网络码的容量区域

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357564

T. Chan

引用次数: 24

Multi-Terminal Communications with Confidential Messages 包含机密信息的多终端通信

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357605

Ruoheng Liu, I. Marić, P. Spasojevic, R. Yates

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引用次数: 4

Space-Time Mesh Codes for the Multiple-Access Relay Network: Space vs. Time Diversity Benefits 多址中继网络的空时网格码:空间分集与时间分集的优势

2007 Information Theory and Applications Workshop Pub Date : 2007-10-22 DOI: 10.1109/ITA.2007.4357565

Cheng-Chun Chang, Heung-no Lee

{"title":"Space-Time Mesh Codes for the Multiple-Access Relay Network: Space vs. Time Diversity Benefits","authors":"Cheng-Chun Chang, Heung-no Lee","doi":"10.1109/ITA.2007.4357565","DOIUrl":"https://doi.org/10.1109/ITA.2007.4357565","url":null,"abstract":"We consider a wireless multiple access network where the sender nodes are aided by a number of relay nodes. A transmission of bit-messages is completed in two phases: in the first phase each sender node originates its message which is overheard at the relay node, and in the second phase each relay node transmits the parity bit calculated from the overheard bit-messages. The low-density parity-check codes are used at the sender nodes in the time-domain, and the low-density generator-matrix code is formed across the spatial domain. At the access node, the received bits from multiple sender nodes and relay nodes are thus encoded in both the time and the spatial domain. We call this combination a space-time mesh code here. In this paper, an iterative decoding scheme is designed for the mesh code and its BER performance in AWGN, fast Rayleigh fading, and quasi-static Rayleigh fading channels are investigated. We note that there is an important trade-off relation between the time-domain and the spatial domain coding. Namely, the time-domain coding is desired when the channel exhibits fast fading; while the spatial domain coding is preferred when the channel is in quasi-static fading state.","PeriodicalId":439952,"journal":{"name":"2007 Information Theory and Applications Workshop","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127855628","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