Behavioral Modeling and Linearization of Crosstalk and Memory Effects in RF MIMO Transmitters
Journal article, 2014
This paper proposes three novel models for behavioral modeling and digital pre-distortion (DPD) of nonlinear 2 x 2 multiple-input multiple-output (MIMO) transmitters in the presence of crosstalk. The proposed models are extensions of the single-input single-output generalized memory polynomial model. Three types of crosstalk effects were studied and characterized as linear, nonlinear, and nonlinear & linear crosstalk. A comparative study was performed with previously published models for the linearization of crosstalk in a nonlinear 2 x 2 MIMO transmitter. The experiments indicate that, depending on the type of crosstalk, the selection of the correct model in the transmitter is necessary for behavioral modeling and sufficient DPD performance. The effects of coherent and partially noncoherent signal generation on the performance of DPD were also studied. For crosstalk levels of 30 dB, the difference in the normalized mean square error and adjacent channel power ratio was found to be 3-4 dB between coherent and partially noncoherent signal generation.
COMPENSATION
MODEL
Behavioral modeling
POWER-AMPLIFIERS
PROCEEDINGS OF THE IEEE
digital pre-distortion (DPD)
nonlinear and linear crosstalk
P39
DIGITAL PREDISTORTION
V83
1995
POLYNOMIALS
EN HW
ARCHITECTURE
RF
power amplifiers (PAs)
VOLTERRA
multiple-input multiple-output (MIMO)
NONLINEAR-SYSTEMS
Author
S. Amin
Royal Institute of Technology (KTH)
University of Gävle
Per Landin
Chalmers, Signals and Systems, Communication, Antennas and Optical Networks
GigaHertz Centre
P. Handel
University of Gävle
Royal Institute of Technology (KTH)
D. Ronnow
University of Gävle
IEEE Transactions on Microwave Theory and Techniques
0018-9480 (ISSN) 15579670 (eISSN)
Vol. 62 4 810-823 6774462Subject Categories
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/tmtt.2014.2309932