On multilevel block modulation codes
On multilevel block modulation codes
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关于多级块调制码
DOI：
10.1109/18.86990
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
Shu Lin
中科院分区：
文献类型：
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作者：
T. Kasami;T. Takata;T. Fujiwara;Shu Lin
研究了分组编码与调制相结合的多电平技术。给出了多电平调制码的一般公式，即具有适当距离度量的分量码。提出了一种构造分量码相互依赖的多级分组调制码的具体方法。给定二进制分量码之间不相互依赖的多电平分组调制码C，该方法得到的多电平分组调制码C'具有与C相同的速率、不小于C的最小平方欧氏距离、与C具有相同状态数的格子图、比C具有更少的最近邻码字数。提出了一种基于软判决极大似然译码的加性高斯白噪声信道分组调制码误差性能分析方法。通过仿真和基于其欧几里得权分布的上界计算了某些特定码的错误概率。>
The multilevel technique for combining block coding and modulation is investigated. A general formulation is presented for multilevel modulation codes in terms of component codes with appropriate distance measures. 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 additive white Gaussian noise (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. >
Tadao Kasami：IEEE 信息论汇刊。
DOI：
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发表时间：
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期刊：
影响因子：
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作者：
通讯作者：
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影响因子：
2.5
作者：
UNGERBOECK, G
通讯作者：
UNGERBOECK, G