摘要
针对多用户MIMO上行传输系统提出了一种低复杂度的检测算法，该算法将当前处理的用户信道矩阵投影到已经处理用户信道矩阵的零空间上，以构造等效信道矩阵，从而保证该用户不受到前面用户的干扰。然后将多用户信道矩阵分解为正交矩阵与块上三角矩阵的乘积，这样可以利用干扰抵消的方法从下至上逐次检测出各个用户的发送信号。与传统的BD算法相比，本文算法较大地减少了在分解出的单用户MIMO系统中的运算量，并且保留了更多的用户信号的维度分量。仿真结果表明本文算法具有检测性能好和复杂度低的特点。
Aimed at the uplink muhiuser MIMO system, a detecting algorithm of low complexity is proposed. The channel matrix of the processing user is projected to the zero space of channel matrix-es of the processed users to construct the equivalent channel matrix, so that the user will be without the interference of the processed users. Then multiuser channel matrix is decomposed into an orthog- onal matrix and a block upper triangular matrix, and users＇ signals are detected with serial interfer- ence canceling from the last user to the first one. In comparison with traditional BD algorithm, the algorithm proposed in this paper significantly reduces complexity in the decomposed single user MI-MO systems and keeps the receiving signals more effective dimensions. Simulation shows that the proposed algorithms achieve good performance with low complexity.
出处
《电子对抗》
2013年第3期28-32,47,共6页
Electronic Warfare
基金
国家科技重大专项（2011ZX03003-003-02）
“十二五”国家高技术发展研究计划（“863”计划）重点项目资助（2012AA01A502,2012AA01A505）
关键词
多用户MIMO
上行链路
信道矩阵分解
等效信道
multiuser MIMO
uplink system
channel matrix decomposition
equivalent channel
