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多输入多输出技术(MIMO)与正交频分复用技术(OFDM)相结合,可以提高无线通信系统在选择性衰落信道中的传输性能,满足新一代移动通信系统的要求。利用超正交空时网格编码(SOSTTC)结构,结合OFDM的优势,构建了一个SOSTTC-OFDM系统,进行了SOSTTC-OFDM系统的仿真实验。通过仿真证明了SOSTTC-OFDM系统具有很好的抗衰落性能,并且采用SOSTTC可以使系统获得更好的分集增益和编码增益。
The combination of Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) can improve the transmission performance of wireless communication systems in selective fading channels and meet the requirements of the new generation of mobile communication systems. A SOSTTC-OFDM system is constructed by using SOSTTC structure and the advantages of OFDM. The simulation experiment of SOSTTC-OFDM system is carried out. Simulation results show that the SOSTTC-OFDM system has good anti-fading performance, and the SOSTTC system can achieve better diversity gain and coding gain.