IEEE Trans. Inf. Theory最新文献_第10页

On One Useful Inequality in Testing of Hypotheses 关于检验假设中的一个有用不等式

IEEE Trans. Inf. Theory Pub Date : 1998-07-01 DOI: 10.1109/18.681348

M. Burnashev

引用次数: 6

On the Power Spectral Density of Self-Synchronizing Scrambled Sequences 自同步打乱序列的功率谱密度

IEEE Trans. Inf. Theory Pub Date : 1998-07-01 DOI: 10.1109/18.681352

I. Fair, V. Bhargava, Qiang Wang

引用次数: 6

Autocorrelation Values of Generalized Cyclotomic Sequences of Order Two 广义二阶切环序列的自相关值

IEEE Trans. Inf. Theory Pub Date : 1998-07-01 DOI: 10.1109/18.681354

C. Ding

引用次数: 116

Block-Coded PSK Modulation Using Two-Level Group Codes Over Dihedral Groups 在二面体群上使用二电平群码的分组编码PSK调制

IEEE Trans. Inf. Theory Pub Date : 1998-07-01 DOI: 10.1109/18.681341

Jyoti Bali, B. Rajan

{"title":"Block-Coded PSK Modulation Using Two-Level Group Codes Over Dihedral Groups","authors":"Jyoti Bali, B. Rajan","doi":"10.1109/18.681341","DOIUrl":"https://doi.org/10.1109/18.681341","url":null,"abstract":"A length n group code over a group G is a subgroup of G/sup n/ under component-wise group operation. Group codes over dihedral groups D/sub M/, with 2M elements, that are two-level constructible using a binary code and a code over Z/sub M/ residue class integer ring modulo M, as component codes are studied for arbitrary M. A set of necessary and sufficient conditions on the component codes for the two-level construction to result in a group code over D/sub M/ are obtained. The conditions differ for M odd and even. Using two-level group codes over D/sub M/ as label codes, the performance of a block-coded modulation scheme is discussed under all possible matched labelings of 2M-APSK and 2M-SPSK (asymmetric and symmetric PSK) signal sets in terms of the minimum squared Euclidean distance. Matched labelings that lead to automorphic Euclidean distance equivalent codes are identified. It is shown that depending upon the ratio of Hamming distances of the component codes some labelings perform better than others. The best labeling is identified under a set of restrictive conditions. Finally, conditions on the component codes for phase rotational invariance properties of the signal space codes are discussed.","PeriodicalId":13250,"journal":{"name":"IEEE Trans. Inf. Theory","volume":"32 1","pages":"1620-1631"},"PeriodicalIF":0.0,"publicationDate":"1998-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75292677","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

Efficient Construction of Minimum-Redundancy Codes for Large Alphabets 大字母最小冗余码的高效构造

IEEE Trans. Inf. Theory Pub Date : 1998-07-01 DOI: 10.1109/18.681345

Alistair Moffat, A. Turpin

引用次数: 46

Block-Coded Modulation Using Two-Level Group Codes Over Generalized Quaternion Groups 在广义四元数群上使用两级群码的分组编码调制

IEEE Trans. Inf. Theory Pub Date : 1997-06-29 DOI: 10.1109/18.746847

T. Selvakumaran, B. Rajan

{"title":"Block-Coded Modulation Using Two-Level Group Codes Over Generalized Quaternion Groups","authors":"T. Selvakumaran, B. Rajan","doi":"10.1109/18.746847","DOIUrl":"https://doi.org/10.1109/18.746847","url":null,"abstract":"A length n group code over a group G is a subgroup of G/sup n/ under component-wise group operation. Two-level group codes over the class of generalized quaternion groups, Q(2/sup m/), m/spl ges/3, are constructed using a binary code and a code over Z(2/sup m-1/), the ring of integers modulo 2/sup m-1/ as component codes and a mapping f from Z/sub 2//spl times/Z(2/sup m-1/)to Q(2/sup m/). A set of necessary and sufficient conditions on the component codes is derived which will give group codes over Q(2/sup m/). Given the generator matrices of the component codes, the computational effort involved in checking the necessary and sufficient conditions is discussed. Starting from a four-dimensional signal set matched to Q(2/sup m/), it is shown that the Euclidean space codes obtained from the group codes over Q(2/sup m/) have Euclidean distance profiles which are independent of the coset representative selection involved in f. A closed-form expression for the minimum Euclidean distance of the resulting group codes over Q(2/sup m/) is obtained in terms of the Euclidean distances of the component codes. Finally, it is shown that all four-dimensional signal sets matched to Q(2/sup m/) have the same Euclidean distance profile and hence the Euclidean space codes corresponding to each signal set for a given group code over Q(2/sup m/) are automorphic Euclidean-distance equivalent.","PeriodicalId":13250,"journal":{"name":"IEEE Trans. Inf. Theory","volume":"1 1","pages":"365-372"},"PeriodicalIF":0.0,"publicationDate":"1997-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83617451","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: 3

Variable-Length Unequal Cost Parsing and Coding for Shaping 变长不等代价解析与整形编码

IEEE Trans. Inf. Theory Pub Date : 1997-06-29 DOI: 10.1109/18.681344

J. Abrahams

引用次数: 6

On the Calculation of the Error Probability for a Multilevel Modulation Scheme Using QAM-Signaling 基于qam信令的多电平调制方案的误差概率计算

IEEE Trans. Inf. Theory Pub Date : 1997-06-29 DOI: 10.1109/18.681340

K. Engdahl, K. Zigangirov

引用次数: 10

A counterexample to a Voronoi region conjecture Voronoi区域猜想的一个反例

IEEE Trans. Inf. Theory Pub Date : 1995-07-01 DOI: 10.1109/18.391270

R. Urbanke, D. Agrawal