基于双选衰落信道的差分空时协作技术

协作分集技术解决了MIMO技术在移动终端受天线制约的问题.由于无线通信环境的特殊性和复杂性,对信道估计十分困难,因此引入了不需要信道估计的差分空时编码,并在时间选择性衰落信道和频率选择性衰落信道的基础上研究了时间-频率双选择性衰落信道模型,在更接近实际信道环境的基础上将差分空时编码和协作分集技术相融合.理论研究和仿真结果均表明系统性能在信道容量、误比特率等方面均得到了提高.

Differential space-time coding cooperative diversity in doubly-selective fading channel

Cooperative diversity technology solves the problem that MIMO system is restricted by antennas in the movable termination.Due to the particularity and complexity of wireless communication,it is very difficult to estimate the channel,therefore the differential space-time coding which doesn＇t need the channel estimation is introduced,and the time-frequency doubly-selective fading channel model on the basis of time selective fading channel and frequency selective fading channel is also established,then combining the differential space-time coding with cooperative diversity techniques,the simulation analysis about the system＇s BER and the system capacity is made on the basis of more actual channel environment.