LTE系统中V-BLAST算法改进  

Improved V-BLAST Algorithm in LTE System

作　　者：郭歌[1] 李小文[1] 陈发堂[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电视技术》2010年第12期87-90,共4页Video Engineering

基　　金：国家科技重大专项(2009ZX3002-009)

摘　　要：LTE系统采用了OFDM,MIMO等关键技术,为了在接收端恢复发送端的数据流,通常需要进行信号检测。在比较了各种传统的信号检测算法之后,提出了一种改进型的V-BLAST算法,将发送端列向量分为可靠性高和可靠性低的两个列向量,首先对可靠性高的列向量运用最大似然算法进行信号检测,在干扰相消后,再对可靠性低的列向量运用传统V-BLAST检测算法。通过比较复杂度,设定两个列向量的维数,使得该改进型算法在性能和运算量间有较好的折中。LTE system uses OFDM,MIMO and other key technologies.In order to restore the data stream of the transmitter at the receiving end,signal detection is necessary.After comparing the traditional signal detection algorithms,an improved version of the V-BLAST algorithm is proposed.The column vector of each subcarrier is divided into low and high reliability of two column vectors,with the first sub-set of the low reliability column vector using ML algorithm for signal detection.After concelling the interference,the high reliability column vector uses the traditional V-BLAST detection algorithm.Through the comparison of the complexity of the two columns,the column vector dimension can be set.The improved algorithm is balance between performance and calculation.

关 键 词：长期演进 错误传播 V-BLAST算法 最大似然 信号检测 

分 类 号：TN929.5[电子电信—通信与信息系统]