摘要
在基站端使用低精度的数模转换器是目前解决大规模多输入多输出(MIMO)系统高成本高功耗的有效方案之一.在此系统结构下,粗糙的量化产生的量化误差对高性能预编码器的设计带来很大的挑战.研究采用1位数模转换器的大规模MIMO下行传输系统的预编码设计问题,聚焦于采用多进制相移键控(MPSK)调制的传输系统.基于建设性干涉的思想,文章提出一种低复杂度非线性预编码算法,该算法在传统1位量化迫零(ZF)预编码的基础上进行低复杂度非线性处理.计算机仿真结果表明所提算法具有优越的性能.
Massive MIMO systems have encountered the problem of high hardware complexity and huge power consumption.One effective solution is to use low-cost and power-efficient hardware components such as low resolution digital-to-analog converters(DACs).However,the quantization error caused by the coarse quantization brings great challenges to the design of high-performance precoder.In this paper,we investigate the problem of the precoder design in massive MIMO systems using 1 bit DACs and focus on down link transmission for MPSK modulation.Based on the idea of constructive interference,a low complexity nonlinear precoding algorithm is proposed.Computer simulation results show validate the effectiveness of the proposed algorithm.
作者
袁怡圃
江丽
YUAN Yipu;JIANG Li(School of Physics and Electronic Information Engineering,Quanzhou Normal University,Quanzhou Fujian 362000,China;School of Electronic Information Engineering,Anhui University,Hefei Anhui 230000,China)
出处
《泉州师范学院学报》
2020年第2期66-72,共7页
Journal of Quanzhou Normal University
基金
福建省中青年教师教育科研项目(JAT170470)。
关键词
大规模MIMO
1位量化
建设性干涉
低复杂度
massive MIMO
1 bit quantization
constructive interference
low complexity
