Concurrent Multiband Linearization for Power Amplifiers With Intermodulation Distortions
Journal article, 2022
This letter investigates digital predistortion (DPD) models for concurrent multiband (MB) transmitters, considering intermodulations (IMDs) fully and partially overlapping with in-band carriers. In order to mitigate the issue of increasing complexity of IMD terms construction, a novel prefrequency shift MB DPD technique is proposed to translate the baseband input signals in frequency by carrier frequencies. Theoretical analysis is provided to justify the prefrequency shift technique. Experimental measurements have been carried out with a quad-band signal to validate the effectiveness of the proposed technique.
intermodulations (IMDs)
Bandwidth
prefrequency shift.
Baseband
Linearity
Concurrent multiband (MB)
Peak to average power ratio
Base stations
digital predistortion (DPD)
Intermodulation distortion
Wireless communication
Author
Wenhui Cao
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Siqi Wang
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
Thomas Eriksson
Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks
IEEE Microwave and Wireless Components Letters
1531-1309 (ISSN) 15581764 (eISSN)
Vol. 32 5 467-470Subject Categories
Signal Processing
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/LMWC.2021.3131493