TY - GEN
T1 - A time-domain calibration scheme of channel reciprocity for TDD MIMO-OFDM system with IQ imbalance
AU - Liang, Yan
AU - Song, Rongfang
AU - Li, Fei
AU - He, Xueyun
AU - Li, Hongbin
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12/7
Y1 - 2017/12/7
N2 - 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.
AB - 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.
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U2 - 10.1109/WCSP.2017.8170913
DO - 10.1109/WCSP.2017.8170913
M3 - Conference contribution
AN - SCOPUS:85046375279
T3 - 2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings
SP - 1
EP - 4
BT - 2017 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017 - Proceedings
T2 - 9th International Conference on Wireless Communications and Signal Processing, WCSP 2017
Y2 - 11 October 2017 through 13 October 2017
ER -