消除GMSK信号符号间串扰的迭代译码技术  

Iterative Decoding Technique for Cancelling Intersymbol Interference of GMSK Signals

作　　者：秦冠峰[1] 周世东[1] 肖立民[1] 姚彦[1] 

机构地区：[1]清华大学电子工程系

出　　处：《电子学报》1999年第S1期76-79,共4页Acta Electronica Sinica

摘　　要：:本文给出了卷积码与GMSK调制器级联系统的一种迭代译码方案 .将最大后验概率 (MAP)算法应用于GMSK差分相位检测器 (DPD)使之能够接收先验信息并给出软输出 ,实现了解调器与其后的卷积码译码器之间的迭代计算 .仿真结果表明 ,与传统的译码方法相比 ,新方案对于克服GMSK信号所固有的严重符号间串扰 (ISI)有明显的改进 .An iterative decoding scheme for the concatenation of convolutional code and GMSK modulator is presented.The maximum a posteriori probability (MAP) algorithm accepting a priori information and giving soft output is applied to a GMSK differential phase detector (DPD).Then we introduce the iteration between the demodulation and the subsequent convolutional decoder.Compared with traditional decoding method,simulation results of the new scheme show evident improvement in overcoming the severe intersymbol interference (ISI) of GMSK signals.

关 键 词：迭代译码 GMSK 差分相位检测器 最大后验概率算法 符号间串扰 

分 类 号：TN76[电子电信—电路与系统]