针对频率选择性衰落多输入多输出(Multiple-Input Multiple-Output,MIMO)结构,提出在各发射天线通道引入直接序列扩频(Direct-Sequence Spread-Spectrum,DSSS)操作以便实现信道的矢量化,然后提出了一种标签延迟发射分集方法和相应的实现频率选择性衰落无线信道估计的盲方法.仿真结果表明了上述标签延迟发射分集方法的有效性及其信道盲估计方法的性能.

With respect to the Multiple-Input Multiple-Output (MIMO) architecture under the frequency-selective fading environment,this paper introduces the Direct-Sequence Spread-Spectrum (DSSS) operation into each transmit-antenna branch so as to make the frequency-selective fading channel vectorizable.Successively,one novel labeled-delay transmit diversity scheme is proposed for the DSSS-MIMO architecture,and the corresponding blind estimation scheme of the frequency-selective wireless channels is also derived.Simulation results demonstrate the validity of the novel labeled-delay transmit diversity scheme and the performance of the blind estimation of frequency-selective channels.