基于SLNR准则的MU-MIMO下行链路预编码算法  

SLNR criterion based precoding algorithm for MU-MIMO downlink

作　　者：张继荣 吕沙沙 ZHANG Jirong;LüShasha(School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《现代电子技术》2018年第23期18-21,26,共5页Modern Electronics Technique

摘　　要：在MU-MIMO系统中,最大化信漏噪比(SLNR)预编码算法同时考虑信号泄漏与噪声因素,但未考虑基站发送多数据流场景下的串扰问题。针对此缺点,提出预编码矩阵与动态功率分配相结合的算法,该算法先采用新的矩阵分解法求解预编码矩阵,然后根据各用户的信道质量信息进行动态功率分配。仿真结果表明,新算法不仅使各个数据流上的能量更加均匀,且各用户分配到的功率也得到了优化,系统在误码率和容量性能上都有所提高。In the MU-MIMO system,the maximum signal-to-leakage-and-noise ratio(SLNR)precoding algorithm takes into account both of the signal leakage and noise factors,but ignores the crosstalk problem in the scenario of multiple data streams transmitted by the base station.Therefore,an algorithm combining precoding matrix and dynamic power allocation is proposed.The new matrix decomposition method is used in the algorithm to solve the precoding matrix,and then the dynamic power allocation is carried out according to the channel quality information of each user.The simulation results show that the new algorithm makes the energy of each data stream uniform,and optimizes the power allocated to each user,and the error rate and capacity performance of the system are improved.

关 键 词：MU-MIMO SLNR预编码算法 动态功率分配 系统和容量 误码率 数据流 

分 类 号：TN911-34[电子电信—通信与信息系统]