高维圆形格子编码调制

Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136) Pub Date : 1997-11-02 DOI:10.1109/ACSSC.1997.680440

Yung-Cheng Lo, J. Dill, A. Lindsey

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引用次数: 2

摘要

圆形栅格编码调制(CTCM)是一种具有状态置换结构的栅格编码，它既保留了传统栅格编码调制(TCM)的特性，又能实现更高效的系统栅格构造。嵌入的状态置换特性保证给定输入符号块的开始状态和结束状态是相同的。这个属性被称为“状态约束”。状态转换形成一个依赖于每个不同输入序列的绕行路径。然而，输入序列的循环移位迫使其状态转换序列的循环移位。这些循环移动状态转换集的分组降低了编码速度并简化了性能分析。

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High dimensional circular trellis-coded modulation

Circular trellis-coded modulation (CTCM) is a trellis coding with a state permutation structure which not only retains the properties of traditional trellis-coded modulation (TCM) but also allows more efficient systematic trellis construction. The embedded state-permuted characteristic guarantees that the starting and ending states for a given input symbol block are the same. This property is termed the "state constraint". The state transitions form a wrap-around path which depends on each distinct input sequence. However, a cyclic shift of the input sequence compels a cyclic shift of its state transition sequence. The grouping of these cyclically shifting state-transition sets reduces the encoding speed and simplifies performance analysis.

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Conference Record of the Thirty-First Asilomar Conference on Signals, Systems and Computers (Cat. No.97CB36136)

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