On the use of H-inf criterion in channel estimation and precoding in massive MIMO systems  

作　　者：Peng XU Dongming WANG Feng QI 

机构地区：[1]School of Computer Science and Engineering,Northeastern University,Shenyang 110819,China [2]National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China [3]Key Laboratory of Opto-Electronie Information Processing,Institute of Automation,Chinese Academy of Science,Shenyang 110016,China

出　　处：《Science China(Information Sciences)》2017年第2期147-160,共14页中国科学（信息科学）（英文版）

基　　金：supported by Basic Scientific Research Business Expenses of China(Grant No.N152304009);National Natural Science Foundation of China(Grant Nos.61271205,61374097,61300195,61473066,61403069)

摘　　要：In this paper, a channel estimation（CE） and precoding scheme by using H-infinity（H-inf） criterion for mitigation of pilot contamination（PC） in massive multiple input multiple output（MIMO） orthogonal frequency division multiplexing（OFDM） systems is investigated. Firstly, different thresholds in H-inf CE and precoding are considered. Secondly, asymptotic analysis is presented to simplify the H-inf precoding, which shows that the complexity of an order of magnitude is reduced. Thirdly, approximate downlink achievable data rates per user are studied for different CE and precoding schemes, such as H-inf and minimum mean square error（MMSE） CE, MMSE, zero-forcing（ZF） and H-inf precoding. The analysis shows that the proposed scheme can provide dual mitigation to the PC. That is, the H-inf CE mitigates the PC by adjusting its thresholds, and the H-inf precoding is utilized to suppress the PC by considering inter-cell interference. The numerical results show that joint use of H-inf CE and H-inf precoding outperforms existing schemes in terms of mitigation to the PC.In this paper, a channel estimation（CE） and precoding scheme by using H-infinity（H-inf） criterion for mitigation of pilot contamination（PC） in massive multiple input multiple output（MIMO） orthogonal frequency division multiplexing（OFDM） systems is investigated. Firstly, different thresholds in H-inf CE and precoding are considered. Secondly, asymptotic analysis is presented to simplify the H-inf precoding, which shows that the complexity of an order of magnitude is reduced. Thirdly, approximate downlink achievable data rates per user are studied for different CE and precoding schemes, such as H-inf and minimum mean square error（MMSE） CE, MMSE, zero-forcing（ZF） and H-inf precoding. The analysis shows that the proposed scheme can provide dual mitigation to the PC. That is, the H-inf CE mitigates the PC by adjusting its thresholds, and the H-inf precoding is utilized to suppress the PC by considering inter-cell interference. The numerical results show that joint use of H-inf CE and H-inf precoding outperforms existing schemes in terms of mitigation to the PC.

关 键 词：massive MIMO pilot contamination PRECODING channel estimation H-inf 

分 类 号：TN919.3[电子电信—通信与信息系统]