Regularized Zero-Forcing Precoder for Massive MIMO System With Transceiver I/Q Imbalances

作     者：Jee, Jeongju Kwon, Girim Park, Hyuncheol 

作者机构：Korea Adv Inst Sci & Technol Sch Elect Engn Daejeon 34141 South Korea 

出 版 物：《IEEE WIRELESS COMMUNICATIONS LETTERS》 (IEEE Wireless Commun. Lett.)

年 卷 期：2019年第8卷第4期

页      面：1028-1031页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Institute of Information & communications Technology Planning & evaluation (IITP) - Korea government (MSIT) [2018-0-00809] 

主　　题：I/Q imbalance massive MIMO regularized zero-forcing precoding 

摘      要：In this letter, we propose a downlink precoder for massive multi-input multi-output (MIMO) system in the presence of I/Q imbalance (IQI) at both base station and user terminals (UTs). We formulate a minimum mean-square error (MMSE) precoding problem with multiple regularization parameters for different channel qualities and channel correlations of UTs with different IQIs. Then we obtain the asymptotically optimal precoding matrix for the massive MIMO system. Moreover, we derive the asymptotic sum rate of the proposed regularized zero-forcing (RZF) precoder. We show that the proposed RZF precoder achieves significantly higher sum rate than conventional RZF precoder. In addition, the proposed precoder shows robust performances to severe IQI conditions.