Multipair two-way massive MIMO AF relaying with ZFR/ZFT and hardware impairments over high-altitude platforms  

作　　者：SUN Xiaoli XU Kui XU Youyun MA Wenfeng 

机构地区：[1]PLA University of Science and Technology,Nanjing 210007,China [2]Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Journal of Communications and Information Networks》2016年第3期105-114,共10页通信与信息网络学报（英文）

基　　金：supported by the Major Research Plan of the National Natural Science Foundation of China(No.91438115);the National Natural Science Foundation of China(Nos.61371123,61301165,61671472);Jiangsu Province Natural Science Foundation(No.BK20160079);Special Financial Grant of The China Postdoctoral Science Foundation(No.2015T81079);China Postdoctoral Science Foundation(No.2014M552612);Jiangsu Postdoctoral Science Foundation(No.1401178C);the Preresearch Project Foundation(No.9140C020306130C02007).

摘　　要：HAPs(High-Altitude Platforms)are one of the most promising alternative infrastructures for providing wireless communications to overcome the shortcomings of terrestrial-tower-based and satellite systems.This paper investigates a multipair two-way MM-AF(Massive MIMO Amplify-and-Forward)relay system over HAPs,where multiple user pairs exchange information within a pair through a relay with a very large number of antennas,and a HAP channel is modeled to follow a Rician fading distribution because of the presence of a line-of-sight path.First,the effect of hardware impairments on a multipair two-way MM-AF system is taken into consideration and is modeled using transmit and receive distortion noises.Then,ZFR/ZFT(Zero-Forcing Reception/Zero-Forcing Transmission)processing matrices of HDR(Half-Duplex Relaying)and FDR(Full-Duplex Relaying)with imperfect channel state information are presented.Finally,the asymptotic expressions of an end-to-end SINR are derived.Theoretical analyses and simulation results show that when the number of relay antennas grows very large,the SE(Spectral Efficiency)of an MM-AF relay system is limited by hardware impairments at the users instead of those at the relay,or by other types of interference.Thus,the quality of the hardware at a relay can be decreased without significantly degrading performance.

关 键 词：massive MIMO HALF-DUPLEX full-duplex Rician fading channels hardware impairments 

分 类 号：TN9[电子电信—信息与通信工程]