基于空时格形码的差分调制

Differential Modulation Using Space-Time Trellis Codes

提出了空时格形码的差分调制方案,并对空时格形码和系统模型以及差分调制技术进行了深入的研究。在发射天线和接收天线数量乘积大于3时,对QPSK和8-PSK的STTCM码和TSC码以及BBH码进行了仿真,仿真结果表明:STTCM码与相应的TSC和BBH码相比具有更低的帧误码率,而且STTCM码能够提供最大可能的分集增益和编码增益。

In this paper,differential modulation scheme using space -time trellis codes is putted forward,and researc h-es on space -time trellis code,syste m model and differential modulation are also presented here.We made simu lations for QP-SK and 8-PSK STTCM codes as well as TSC codes and BBH codes when the product of the number of the transmitting ante nna and the receiving antenna is larger t han 3.The simulations prove that the frame error probability of STTCM cod e is lower than the corresponding TSC code and BBH co de.And STTCM code can provide maximu m possible diversity gain and coding gain.