TY - JOUR
T1 - Joint Estimation and Compensation of TX and RX IQ Imbalance for Direct-Conversion Transceiver
AU - Zhang, Changming
AU - Xiao, Zhenyu
AU - Su, Li
AU - Jin, Depeng
N1 - Publisher Copyright:
© 2015, Springer Science+Business Media New York.
PY - 2015/7/10
Y1 - 2015/7/10
N2 - For direct-conversion transceiver, IQ imbalance is significant at both transmitter (TX) and receiver (RX), which brings in image interference and degrades the transmission quality. In order to handle this problem, the maximum-likelihood algorithm is employed to jointly estimate TX and RX IQ imbalance, and the corresponding Cramer–Rao lower bounds (CRLBs) are calculated. Furthermore, a compensation mechanism is proposed to combat IQ imbalance, which is derived from the criterion of maximum signal-to-interference-plus-noise ratio (MSINR). In addition, comprehensive simulations indicate that the mean square errors of the proposed estimation coincide with the CRLBs. Also, the proposed MSINR compensation achieves competitive performance, in terms of both SINR and bit error rate.
AB - For direct-conversion transceiver, IQ imbalance is significant at both transmitter (TX) and receiver (RX), which brings in image interference and degrades the transmission quality. In order to handle this problem, the maximum-likelihood algorithm is employed to jointly estimate TX and RX IQ imbalance, and the corresponding Cramer–Rao lower bounds (CRLBs) are calculated. Furthermore, a compensation mechanism is proposed to combat IQ imbalance, which is derived from the criterion of maximum signal-to-interference-plus-noise ratio (MSINR). In addition, comprehensive simulations indicate that the mean square errors of the proposed estimation coincide with the CRLBs. Also, the proposed MSINR compensation achieves competitive performance, in terms of both SINR and bit error rate.
KW - Cramer–Rao lower bound
KW - Direct-conversion transceiver
KW - IQ imbalance
KW - Maximum-likelihood estimation
KW - Signal-to-interference-plus-noise ratio
UR - https://www.scopus.com/pages/publications/84930541467
U2 - 10.1007/s11277-015-2424-0
DO - 10.1007/s11277-015-2424-0
M3 - 文章
AN - SCOPUS:84930541467
SN - 0929-6212
VL - 83
SP - 779
EP - 790
JO - Wireless Personal Communications
JF - Wireless Personal Communications
IS - 1
ER -