摘要
文章作者设计并仿真了一种卷积码与80PPM（重叠脉冲位置调制）相结合的TCM（网格编码调制）系统。该系统能够在不降低带宽利用率的前提下改善OPPM系统性能。计算机仿真结果表明：该系统相对未编码的4PPM（脉冲位置调制）系统可以取得1～3dB的编码增益。
This article designs and simulates a kind of Trellis Coded Modulation （TCM） system, in which the convolutional code is combined with Overlapping Pulse-Position Modulation （8OPPM）. This system can improve the OPPM system performance at no penalty in bandwidth utilization ratio. The simulation results indicate that the system can obtain 1 - 3 dB coding gain in comparison with the uncoded Pulse Position Modulation （4PPM）.
出处
《光通信研究》
北大核心
2008年第5期13-15,70,共4页
Study on Optical Communications
基金
国防重点实验室基金资助项目(9140C3601010901)
陕西省教育厅科技专项基金资助项目(07JK332)
陕西省自然科学基金资助项目(2007F12)
