TY - GEN
T1 - A Novel Digital Predistortion of 5G Wideband Power Amplifier with Narrow Bandwidth ADC
AU - Guan, Ning
AU - Wang, Hua
AU - Li, Kenan
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/7/20
Y1 - 2018/7/20
N2 - Digital predistortion (DPD) has played an important role in current forth-generation (4G) mobile system to enhance the linearity of power amplifier (PA) and is expected to continue its functionality in forth-coming 5G. However, large signal bandwidth in 5G scenario complicates the implementation of DPD, especially the feedback path which DPD employs to observe PA output. In this paper, a novel feedback strategy is proposed for DPD of future wideband power amplifier (PA), using ADC with low sampling rate and narrow analog bandwidth. Some issues on practical hardware implementation are addressed to strengthen the realizability of our proposed approach. Simulation results show that similar linearization performance of PA can be achieved compared to conventional DPD, with much lower feedback cost.
AB - Digital predistortion (DPD) has played an important role in current forth-generation (4G) mobile system to enhance the linearity of power amplifier (PA) and is expected to continue its functionality in forth-coming 5G. However, large signal bandwidth in 5G scenario complicates the implementation of DPD, especially the feedback path which DPD employs to observe PA output. In this paper, a novel feedback strategy is proposed for DPD of future wideband power amplifier (PA), using ADC with low sampling rate and narrow analog bandwidth. Some issues on practical hardware implementation are addressed to strengthen the realizability of our proposed approach. Simulation results show that similar linearization performance of PA can be achieved compared to conventional DPD, with much lower feedback cost.
KW - 5G
KW - Aliasing Effect
KW - Digital Predistortion
UR - http://www.scopus.com/inward/record.url?scp=85050991974&partnerID=8YFLogxK
U2 - 10.1109/VTCSpring.2018.8417490
DO - 10.1109/VTCSpring.2018.8417490
M3 - Conference contribution
AN - SCOPUS:85050991974
T3 - IEEE Vehicular Technology Conference
SP - 1
EP - 5
BT - 2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 87th IEEE Vehicular Technology Conference, VTC Spring 2018
Y2 - 3 June 2018 through 6 June 2018
ER -