MIMO-OFDM系统中改进的格点减少检测算法  

The improved lattice-reduction detection in MIMO-OFDM systems

作　　者：田木村 宋婷[1] 刘江顺 杜江[1] 

机构地区：[1]成都信息工程学院,通信工程学院,四川成都610225

出　　处：《电子技术应用》2014年第7期109-111,共3页Application of Electronic Technique

基　　金：成都信息工程学院2011年中青年学术带头人科研基金资助项目(J201106)

摘　　要：多输入多输出正交频分多路复用系统中,信道矩阵变化快,传统的格点减少辅助线性检测将产生大量迭代。提出一种改进的格点减少算法,该算法先对信道矩阵做排序的QR分解,得到上三角矩阵R,再对R进行LLL算法处理,处理过程中不再进行列交换运算,从而省去LLL算法中的迭代。仿真结果表明,该算法在保障误码性能的前提下,减少了计算复杂度。The channel matrix changes rapidly in MIMO-OFDM systems, which leads to prohibitive complexity of using lattice- reduction detection. Accordingly, an improved algorithm is proposed in this paper. Using this algorithm, the receiver does sorted QR decomposition of the channel matrix firstly, and then adopts the LLL algorithm to process the upper triangular matrix R. In the process of operation, it does not exchange the columns of R and thus eliminates iterations of the LLL algorithm. Simulation results show that the improved algorithm significantly reduces the computational complexity with the same BER performance of lattice-reduction deteetion.

关 键 词：多输入多输出 正交频分多路复用 信号检测 格点减少 排序QR分解 

分 类 号：TN919.3[电子电信—通信与信息系统]