Open AccessDigital predistortion technique for low resource consumption using carrier aggregated 4G/5G signals
Author(s) -
Jaraut Praveen,
Rawat Meenakshi,
Roblin Patrick
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.5608
Subject(s) - predistortion , electronic engineering , computer science , telecommunications , materials science , engineering , amplifier , cmos
Carrier aggregation (CA) is an essential part of long‐term evolution (LTE) signals for 4G/5G wireless communication. However, CA LTE signals place stringent conditions on the radio‐frequency power amplifiers (PAs). The multi‐band operation, wider bandwidth, and related hardware cost increase for the implementation of digital predistortion (DPD) for the multi‐band PAs. This study presents a novel independent component analysis (ICA) method for the DPD models which is suitable for all three cases (intra‐band contiguous, intra‐band non‐contiguous and inter‐band non‐contiguous) of CA. It has been established that the memory requirement of ICA‐based memory polynomial (MP) model implementation is much lesser than the state‐of‐the‐art low complexity models such as MP model, orthogonal MP model and principal component analysis‐based MP model for CA LTE signals. The proof‐of‐concept is provided with two different measurement setups for establishing its versatility.