基于混合精度模数转换器的大规模MIMO-OFDM系统性能分析  

Performance Analysis of Massive MIMO-OFDM System with Mixed-precision Analog-to-digital Converter

作　　者：刘凯[1] 陈贵潮 陶成[1] 周涛[1,2] LIU Kai;CHEN Guichao;TAO Cheng;ZHOU Tao(Institute of Broadband Wireless Mobile Communications,Beijing Jiaotong University,Beijing 100044,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 211189,China)

机构地区：[1]北京交通大学宽带无线移动通信研究所,北京100044 [2]东南大学移动通信国家重点实验室,南京211189

出　　处：《电子与信息学报》2019年第11期2541-2548,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61701017);中央高校基本科研业务费专项资金(2018JBM003);北京市自然科学基金(4174102);东南大学移动通信国家重点实验室开放研究基金(2018D11)~~

摘　　要：该文对在接收端使用混合精度的模数转换器且采用迫零接收算法的大规模MIMO-OFDM系统的上行链路的频谱效率和能量效率进行了研究。采用加性量化噪声模型来对系统的性能进行分析,推导出整个系统的频谱效率和能量效率的近似闭式表达式,并通过仿真证明了表达式的正确性。研究结果表明,系统的频谱效率和每个用户的发送功率,接收端天线数目和接收端量化精度有关。数值和仿真结果还表明可以通过增加基站端的天线数量来补偿由低精度模数转换器带来的性能损失。The spectral efficiency and energy efficiency of the uplink of massive MIMO-OFDM system is studied using mixed-precision Analog-Digital Converter(ADC)and Zero-Forcing(ZF)reception algorithm at the receiver.By using the additive quantization noise model to analyze the performance of the system,the approximate closed expression of the spectral efficiency and energy efficiency of the whole system is derived,and the correctness of the expression is proved by simulation.The research results show that the spectral efficiency of the system is related to the transmission power of each user,the number of antennas at the receiver and the quantization accuracy of the receiver.Numerical and simulation results also show that the performance loss caused by the low-precision ADC can be compensated by increasing the number of antennas at the base station.

关 键 词：MIMO-OFDM 混合精度量化 频谱效率 能量效率 

分 类 号：TN929.5[电子电信—通信与信息系统]