预编码
电子工程
计算机科学
多输入多输出
电信线路
放大器
量化(信号处理)
转换器
发射机
光谱效率
高效能源利用
带宽(计算)
电气工程
工程类
电信
波束赋形
算法
频道(广播)
电压
作者
Ferhad Askerbeyli,Wen Xu,Josef A. Nossek
标识
DOI:10.1109/vtc2023-spring57618.2023.10199146
摘要
Millimeter wave (mmWave) massive multiple-input-multiple-output (mMIMO) is a key technology for high capacity mobile communications. The straightforward implementation of mMIMO with fully digital precoding (FDP) and high resolution digital-to-analog converters (DACs) ends up with poor energy efficiency (EE) at the transmitter. Use of 1-bit DACs is a promising approach to improve the EE, since the power amplifiers (PAs) are driven with the maximum efficiency when they are fed with constant envelope (CE) signals. In this paper, we evaluate spectral efficiency (SE) and EE performances of FDP and hybrid precoding (HP) in mmWave mMIMO downlink to identify the more compatible option with the 1-bit quantization. Numerical results illustrate that FDP in general achieves higher SE and has higher EE at high signal-to-noise ratio (SNR), whereas HP has higher EE and achieves higher maximum EE at low SNR.
科研通智能强力驱动
Strongly Powered by AbleSci AI