低复杂度多用户多输入多输出系统预编码算法  

A low complexity precoding algorithm for spatial multiplexing multi-user MIMO system

作　　者：解志斌[1,2] 刘庆华[1,2] 颜培玉[2] 

机构地区：[1]江苏科技大学电子信息学院,江苏镇江212003 [2]江苏大学江苏省汽车工程重点实验室,江苏镇江212013

出　　处：《江苏科技大学学报（自然科学版）》2012年第1期59-64,共6页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51008143);江苏省汽车工程重点实验室开放基金资助项目(QC201005)

摘　　要：针对多用户多输入多输出(Multi-user Multiple-input Multiple-output,MIMO)系统虽可获得很好的系统容量性能,用户间却彼此存在干扰的问题,提出了一种具有较低计算量的线性块对角化预编码算法,并进一步给出了发送端性能优化预处理算法,从而较好的消除用户间干扰,并充分利用多用户MIMO系统容量性能.所提算法可以获得相近的误码率性能,具有较低的计算量,较好的满足了无线通信系统实时性、快速性的要求.仿真结果验证了所提算法的有效性.Multi-user multiple-input multiple-output （MU-MIMO） system is an effective wireless communication system and can significantly increase spectral efficiency. In a downlink muhi-user MIMO system where a base station （BS） transmits to different usel~ simultaneously and in the same frequency band, however, processing is more challenging due to the lack of coolrdination among the users. To solve this problem, a effective precoding al- gorithm, which has low complexity is proposed in this paper. At the same time, a preprocessing scheme is ad- vised for the transmitter. The proposed algorithm can cancel the multi-user interference （MUI） and make full us- er of the spectral of MU-MIMO system. Compared with the traditional precoding algorithm, the proposed algo- rithm can get the similar bit error rate （BER）, has lower computational complexity, and meets the requirement of real-time and. rapidity of wireless communication system well. The simulation results show that the proposed al- g3rithm attains good performance and is efficiency.

关 键 词：多用户多输入多输出系统 预编码 误码率 

分 类 号：TN911.7[电子电信—通信与信息系统]