Reciprocity calibration of a massive MIMO based on a local calibration

doi:10.16511/j.cnki.qhdxxb.2017.26.044

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Abstract Reciprocity calibrations between the uplink and downlink channels are very important in time division duplex (TDD) massive multiple-input multiple-output (MIMO) systems. When the calibration has no additional radio frequency (RF) chain, the calibration was sounding between different antenna elements. The least squares (LS) method is then used to analyze the data, but the analysis is very complex. This paper describes a calibration method based on a local calibration. The method is accurate since the local calibration only uses results between nearby antennas and simpler due to limited size of each local calibration. Simulations show that the complexity is reduced without significant accuracy loss.

Keywords massive multiple-input multiple-output (MIMO) reciprocity calibration least square calibration local calibration

ZTFLH:

TN929.5

Issue Date: 15 September 2017

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	LIU Yu
	ZHANG Xiujun
	ZHOU Shidong

Cite this article:

LIU Yu,ZHANG Xiujun,ZHOU Shidong. Reciprocity calibration of a massive MIMO based on a local calibration[J]. Journal of Tsinghua University(Science and Technology), 2017, 57(9): 939-944,951.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2017.26.044 OR http://jst.tsinghuajournals.com/EN/Y2017/V57/I9/939

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