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).
关键词
重叠脉冲位置调制网格编码调制卷积码带宽利用率编码增益
Keywords
OPPMTCMconvolutional codebandwidth utilization ratiocoding gain