A time-domain calibration scheme of channel reciprocity for TDD MIMO-OFDM system with IQ imbalance

Yan Liang, Rongfang Song, Fei Li, Xueyun He, Hongbin Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

As one of the major radio-frequency impairments in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system, in-phase and quadrature-phase (IQ) imbalance tends to destroy the reciprocity between uplink and downlink channel based on time-division duplex (TDD) mode and deteriorate system performance. In this paper, a time-domain calibration scheme is proposed to restore the channel reciprocity for TDD MIMO-OFDM system in the presence of frequency-independent IQ imbalance. The calibration model is built and two calibration matrices are designed to precode the uplink and downlink transmission, respectively. Complexity analysis shows that the proposed scheme is with low computational complexity, which is linear in the number of antennas at the base station and mobile station. Simulation results show that the proposed scheme can restore the channel reciprocity and provide the performance of bit error rate and cumulative distribution functions of downlink capacity close to the ideal case without IQ imbalance.

Original languageEnglish
Title of host publication2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings
Pages1-4
Number of pages4
ISBN (Electronic)9781538620625
DOIs
StatePublished - 7 Dec 2017
Event9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Nanjing, China
Duration: 11 Oct 201713 Oct 2017

Publication series

Name2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings
Volume2017-January

Conference

Conference9th International Conference on Wireless Communications and Signal Processing, WCSP 2017
Country/TerritoryChina
CityNanjing
Period11/10/1713/10/17

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