TY - GEN
T1 - Properness-based blind mitigation of feedback impairments in digital pre-distortion system
AU - Guan, Ning
AU - Wang, Yanzhi
AU - Wang, Hua
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/11/21
Y1 - 2016/11/21
N2 - Digital pre-distortion is a powerful technique in combating nonlinear distortion caused by power amplifier. However, due to impairment such as I/Q imbalance in feedback path, the linearization performance can be greatly degraded. Moreover, in wideband PA linearization system, I/Q imbalance in feedback path can be frequency-dependent, which complicates the design of the DPD. In this paper, we present a mitigation method, which compensates I/Q imbalance utilizing proper nature of power amplifier output signal. The proposed method is totally blind and no external calibration signal is needed. Meanwhile, fast convergence is achieved compared to existing properness-based I/Q compensation algorithms. Effectiveness of the proposed technique is verified by computer simulations.
AB - Digital pre-distortion is a powerful technique in combating nonlinear distortion caused by power amplifier. However, due to impairment such as I/Q imbalance in feedback path, the linearization performance can be greatly degraded. Moreover, in wideband PA linearization system, I/Q imbalance in feedback path can be frequency-dependent, which complicates the design of the DPD. In this paper, we present a mitigation method, which compensates I/Q imbalance utilizing proper nature of power amplifier output signal. The proposed method is totally blind and no external calibration signal is needed. Meanwhile, fast convergence is achieved compared to existing properness-based I/Q compensation algorithms. Effectiveness of the proposed technique is verified by computer simulations.
KW - I/Q imbalance
KW - blind compensation
KW - digital predistortion
KW - properness
UR - http://www.scopus.com/inward/record.url?scp=85006815893&partnerID=8YFLogxK
U2 - 10.1109/WCSP.2016.7752715
DO - 10.1109/WCSP.2016.7752715
M3 - Conference contribution
AN - SCOPUS:85006815893
T3 - 2016 8th International Conference on Wireless Communications and Signal Processing, WCSP 2016
BT - 2016 8th International Conference on Wireless Communications and Signal Processing, WCSP 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th International Conference on Wireless Communications and Signal Processing, WCSP 2016
Y2 - 13 October 2016 through 15 October 2016
ER -