Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2018, Vol. 41 ›› Issue (3): 56-62.doi: 10.13190/j.jbupt.2017-164

• Papers • Previous Articles     Next Articles

Research on Channel Reciprocity of Massive MIMO Time Division Duplex System

CHEN Ying1, YIN Liang2, SUN Jun1, LI Shu-fang2   

  1. 1. School of Communication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China;
    2. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2017-08-18 Online:2018-06-28 Published:2018-06-04

Abstract: In time division duplex massive multiple-input multiple-output (MIMO) systems, the channel estimation and reciprocity calibration determine whether the system can effectively utilize channel reciprocity. In order to analyze the effect of channel estimation on the system performance, the mean square error of channel estimation is deduced and the closed-form expression of uplink and downlink channel capacity in single-user MIMO system is obtained. To reduce the error of on-line calibration, a new mutual coupling interference model was proposed by using the property of mutual coupling. With the help of base station power control and coordination functions, a calibration scheme was designed to reduce the mutual coupling interference. Simulations verify the feasibility of this scheme.

Key words: massive multiple-input multiple-output, reciprocity, calibration, channel estimation, mutual coupling

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