脉冲重叠PPM直接检测光信道上的TCM设计

The Design of Trellis Coded overlapping PPM for optical direct-detection channels

本文研究了脉冲重叠脉位调制（ＰＰＭ）直接检测光信道上的格状编码调制（ＴＣＭ）设计的性能准则和设计方法。根据所采用的调制格式和光信号检测方式的特点，本文导出了码字路径间的一种距离量度，并以之作为ＴＣＭ设计的基础，给出了相应的设计方法及实例。

In this paper,we study the performance criteria and code design of trellis coded overlapping PPM for optical direct-detection channels.Based on the modulation format and direct-detection of optical signal,we develop a distance metric between codeword paths and then give the trellis code design method.