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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。
A scheme of differential modulation of space-time trellis codes is proposed. The space-time trellis code, system model and differential modulation techniques are also studied in detail. The STTCM code, TSC code and BBH code of QPSK and 8-PSK are simulated when the product of the number of transmitting antenna and receiving antenna is more than 3. The simulation results show that the STTCM code has a lower value than the corresponding TSC and BBH codes Frame error rate, and STTCM code to provide the maximum possible diversity gain and coding gain.