ON MULTILEVEL BLOCK MODULATION CODES

被引：50
|
作者：
KASAMI, T [1 ]
TAKATA, T [1 ]
FUJIWARA, T [1 ]
LIN, S [1 ]
机构：
[1] UNIV HAWAII MANOA, DEPT ELECT ENGN, HONOLULU, HI 96822 USA
来源：
IEEE TRANSACTIONS ON INFORMATION THEORY | 1991年 / 37卷 / 04期
基金：
美国国家航空航天局; 美国国家科学基金会;
关键词：
MULTILEVEL MODULATION CODES; BASIC MULTILEVEL CODES; SIGNAL LABELING; CROSS-OVER CONSTRUCTION; TRELLIS DIAGRAM;
D O I：
10.1109/18.86990
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
The multilevel technique for combining block coding and modulation is investigated. First, a general formulation is presented for multilevel modulation codes in terms of component codes with appropriate distance measures. Then a specific method for constructing multilevel block modulation codes with interdependency among component codes is proposed. Given a multilevel block modulation code C with no interdependency among the binary component codes, the proposed method gives a multilevel block modulation code C' that has the same rate as C, a minimum squared Euclidean distance not less than that of C, a trellis diagram with the same number of states as that of C and a smaller number of nearest neighbor codewords than that of C. Finally, a technique is presented for analyzing the error performance of block modulation codes for an AWGN channel based on soft-decision maximum likelihood decoding. Error probabilities of some specific codes are evaluated by simulation and upper bounds based on their Euclidean weight distributions.
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页码：965 / 975
页数：11
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