摘要
针对传统的毫米波大规模多输入多输出(Multiple-Input Multi-Output,MIMO)系统存在硬件成本高和系统开销大等问题,提出一种基于人工蜂群(Artificial Bee Colony,ABC)算法的部分连接结构的数字模拟混合预编码方案。数字域部分采用经典的迫零(Zero-Force,ZF)预编码,在此基础上,推算了实现系统可达和速率最大化时,其模拟预编码矩阵应满足的条件,并进一步利用ABC算法的思想,把混合预编码矩阵设计问题等效为随机搜索寻优问题,求得最优的预编码矩阵。针对传统的ABC算法探索与开发能力未能达到很好的平衡这一缺陷,又提出一种基于交叉操作的全局ABC算法的解决方案。通过理论分析和仿真结果表明,相比传统算法,所提出的算法在系统总速率与算法收敛速度等方面的性能都有所提升。
In order to solve the problems of high hardware cost and high system overhead of the traditional millimeter wave massive Multiple-Input Multiple-Output(MIMO)system,a digital and analog hybrid precoding scheme based on the Artificial Bee Colony(ABC)algorithm is proposed with partially-connected architecture.Particularly,the classic Zero-Forcing(ZF)precoding is firstly adopted in the digital domain,and then the analog precoding matrix is separately designed to satisfy the condition of maximizing the sum achievable rate of the system.And combined with the idea of ABC,the hybrid precoding design problem is equivalent to a random optimization problem for obtaining the optimal precoding matrix.Considering that the traditional ABC algorithm has a bad balance in exploration and development capabilities,a global ABC algorithm solution based on crossover operation is proposed.Through theoretical analysis and simulation results,it is shown that,compared with the traditional algorithms,the proposed algorithm has superiority in the system sum rate and convergence performance.
作者
肖晴
谭方青
徐超
XIAO Qing;TAN Fangqing;XU Chao(Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China;School of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)
出处
《无线电工程》
北大核心
2023年第3期584-590,共7页
Radio Engineering
基金
国家自然科学基金(62261013)
广西无线宽带通信与信号处理重点实验室2022年主任基金(GXKL06220104)。
