一种基于D-STTD的下行MIMO-OFDM链路模型  

A Downlink MIMO-OFDM Model Based On D-STTD

作　　者：胡学斌[1] 张忠培[1] 黄炜[1] 

机构地区：[1]电子科技大学通信与信息工程学院,成都610054

出　　处：《微计算机信息》2007年第21期109-110,121,共3页Control & Automation

基　　金：国家自然科学基金重大项目(60496313)

摘　　要：提出了一种基于D-STTD模式的下行MIMO-OFDM链路模型,为满足下行高速通信和大的系统容量。基于移动接收端已知信道状态信息的假设,提出了一种将4N×4N矩阵求逆分解为N个4×4小矩阵求逆的算法,从而降低了运算量和移动接收机的复杂度,最后通过仿真研究了模型在频率选择性信道及其相关信道下的性能。To support high speed communication and largest system capacity, A downlink MIMO-OFDM model based D-STTD is proposed. Assuming that the channel state information at the mobile receiver side was known, a algorithm about inverse matrix is proposed, inverse size of 4N×4N matrix can be obtained by getting the inverse of N matrices of 4×4 gotten by decomposing it, so that the complexity of computation and receiver has been decreased. At last, Through the simulation, this article analyses the downlink performance in the frequency selective channels and the correlative channels.

关 键 词：双空时发射分集 正交频分复用 多入多出 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]