摘要
探讨了大规模MIMO中预编码的实现算法。针对大规模多输入多输出系统中预编码复杂度随系统维数变大而增加的问题,提出了一种基于截断多项式展开的预编码算法,分析了该算法对比传统正则迫零预编码的优越性,并基于系统吞吐量和预编码复杂度的平衡考虑,采用随机矩阵理论,推导出了实现所提算法的最优预编码权值系数。在不同信道条件下,当阶数一定时,该算法用户平均可达速率随信噪比增加会无限趋近于正则迫零算法。该算法复杂度不会随系统用户数和天线数的增加而变大,具有可实现性。
The implementation of precoding algorithm for massive Multiple-Input Multiple-Output （MIMO） system is discussed. The computational precoding complexity increases with its dimensions in MIMO system. In view of this problem,a precoding scheme based on the truncated polynomial expansion is proposed and the superiority of it is analyzed compared with the conventional regularized zero forc- ing precoding. Using the random matrix theory ,the op;imal preeoding weights coefficient is derived for tradeoff between system through- put and precoding complexity. Under different channel conditions,the simulation shows that the average achievable rate will increase infi- nitely approaches the regularized zero forcing precodin,; in a certain order. The complexity of the proposed algorithm does not change with the increase of the number of users and antennas,which is easy to realize.
出处
《计算机技术与发展》
2016年第9期154-157,共4页
Computer Technology and Development
基金
陕西省科学技术研究发展计划项目(2013JC2-17
2013JK1163)
