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.
power amplifiers (PAs)
1995
POWER-AMPLIFIERS
Behavioral modeling
ARCHITECTURE
COMPENSATION
RF
V83
PROCEEDINGS OF THE IEEE
P39
POLYNOMIALS
digital pre-distortion (DPD)
multiple-input multiple-output (MIMO)
EN HW
NONLINEAR-SYSTEMS
VOLTERRA
DIGITAL PREDISTORTION
nonlinear and linear crosstalk
MODEL
Author
S. Amin
Hogskolan i Gavle
The Royal Institute of Technology (KTH)
Per Landin
GigaHertz Centre
Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner
P. Handel
The Royal Institute of Technology (KTH)
Hogskolan i Gavle
D. Ronnow
Hogskolan i Gavle
IEEE Transactions on Microwave Theory and Techniques
0018-9480 (ISSN)
Vol. 62 4 810-823Subject Categories (SSIF 2011)
Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/tmtt.2014.2309932