TY - JOUR
T1 - Channel compensation for reciprocal TDD massive MIMO-OFDM with IQ imbalance
AU - Liang, Yan
AU - Li, Hongbin
AU - Li, Fei
AU - Song, Rongfang
AU - Yang, Lihua
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/12
Y1 - 2017/12
N2 - Massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems are sensitive to in-phase and quadrature (IQ) imbalances, which destroys the reciprocity of time-division duplex (TDD) uplink/downlink channels with potentially large performance degradation. In this letter, we investigate the compensation of channel reciprocity for TDD massive MIMO-OFDM systems in the presence of IQ imbalances at both the transmitter and receiver. A frequency-domain compensation scheme is proposed, which uses compensation matrices to precode uplink and downlink transmissions. By disassembling the effective channel model into pairs of mirror subcarriers and utilizing block matrix inversion, the compensation matrices can be calculated with a complexity that is linear in the number of antennas at the base station and mobile station. Simulations verify the effectiveness of the proposed scheme.
AB - Massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems are sensitive to in-phase and quadrature (IQ) imbalances, which destroys the reciprocity of time-division duplex (TDD) uplink/downlink channels with potentially large performance degradation. In this letter, we investigate the compensation of channel reciprocity for TDD massive MIMO-OFDM systems in the presence of IQ imbalances at both the transmitter and receiver. A frequency-domain compensation scheme is proposed, which uses compensation matrices to precode uplink and downlink transmissions. By disassembling the effective channel model into pairs of mirror subcarriers and utilizing block matrix inversion, the compensation matrices can be calculated with a complexity that is linear in the number of antennas at the base station and mobile station. Simulations verify the effectiveness of the proposed scheme.
KW - IQ imbalance
KW - OFDM
KW - Reciprocity of channel
KW - TDD
KW - V massive MIMO
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U2 - 10.1109/LWC.2017.2740936
DO - 10.1109/LWC.2017.2740936
M3 - Article
AN - SCOPUS:85028474165
SN - 2162-2337
VL - 6
SP - 778
EP - 781
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 6
ER -