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)