Complexity Analysis of Wideband Power Amplifiers Linearization in Multi-band Signal Transmission for Massive MIMO systems
Paper in proceeding, 2020
Massive multi-input and multi-output (MIMO) systems request wideband power amplifiers (PA) for multi-band signal transmission. In this paper, we present different digital predistortion (DPD) techniques to linearize wideband PA with multi-band stimulus. We firstly propose a general form for pruned multi-band DPD models with low complexity. A study on the implementation complexities of different linearization methods is then analyzed. This paper provides a critical view on the metric of implementation complexity in function of the DPD model complexity and the sampling frequency of the signal processing. We finally propose a sampling frequency threshold to determine the best DPD solution according to the measurement results.
multi-band transmission
wideband power amplifiers
Digital predistortion
massive MIMO system
nonlinear distortion
Author
Siqi Wang
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Wenhui Cao
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Thomas Eriksson
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
IEEE MTT-S International Microwave Symposium Digest
0149645X (ISSN)
Vol. 2020-August 960-963 92239439781728168159 (ISBN)
2020 IEEE/MTT-S International Microwave Symposium (IMS)
Los Angeles, USA,
Los Angeles, USA,
Subject Categories
Telecommunications
Information Science
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/IMS30576.2020.9223943