线性卷积信道混合模型下WSDM的解决方法  

Solution to WSDM under Linear Convolutive Channel Mixed Model

作　　者：曹玉凡 沈越泓[1] 袁志钢[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信技术》2015年第12期1329-1333,共5页Communications Technology

基　　金：国家自然科学基金项目(No.61172061);江苏省自然科学基金项目(No.BK2011117)~~

摘　　要：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。WSDM （Wireless Statistic Division Multiplexing） allows the simutaneous transmission of muhi- 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.

关 键 词：无线信道统计复用 线性卷积信道 Householder变换 高阶累积量 信号分离 

分 类 号：TN911.72[电子电信—通信与信息系统]