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Reciprocity calibration methods for Massive MIMO based on antenna coupling

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Author

Summary, in English

In this paper we consider time-division-duplex (TDD) reciprocity calibration of a massive MIMO system. The calibration of a massive MIMO system can be done entirely at the base station (BS) side by sounding the BS antennas one-by-one while receiving with the other BS antennas. With an M antenna BS, this generates M(M - 1) signals that can be used for calibration purposes. In this paper we study several least-squares (LS) based estimators, differing in the number of received signals that are being used. We compare the performance of the estimators, and we conclude that is possible to accurately calibrate an entire BS antenna array using the mutual coupling

between antennas as the main propagation mechanism.

Publishing year

2014

Language

English

Document type

Conference paper

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • Massive MIMO
  • TDD reciprocity
  • antenna calibration
  • estimation

Conference name

IEEE Globecom 2014

Conference date

2014-12-08 - 2014-12-08

Conference place

Austin, Texas, United States

Status

Published