线性卷积信道混合模型下WSDM的解决方法

摘要

WSDM ( Wireless Statistic Division Multiplexing) allows the simutaneous transmission of multi-ple signals in the same frequency over wireless channels,and thus could improve the utilization efficiency of radio-frequency spectrum greatly. Aiming at the time-delay of wireless signal in space transmission process, a mixed model in linear convolutive channel is firstly constructed. Then in light of how to separate the time-frequency mixed signals effectively at the receiver and realize multiplexing,and with the shift of time-domain signal into frequency domain, a method to achieve the joint diagonalization of high-order cu-mulant matrices via Householder transformation is proposed, thus to realize convenient and rapid separation of the mixed signals. Computer simulation indicates the validity of this proposed method.%无线信道统计复用( WSDM)技术，允许在无线信道上同时同频传送多路信号，从而有效提高无线电频谱的利用效率。针对无线信号在空间传输过程中的时延特性，首先建立了其在线性卷积信道下的混合模型。其次，对于如何在接收端有效分离接收到的时频混合信号，实现信道复用，通过把时域信号转变到频域中去，提出了一种使用Householder变换来实现高阶累积量矩阵组联合对角化的方法，从而能够简便快速的分离混合信号。计算机仿真同样证明文中所提方法的有效性。