Title
Combating the dimensionality of nonlinear MIMO amplifier predistortion by basis pursuit
Date Issued
15 December 2014
Access level
open access
Resource Type
conference paper
Author(s)
University of Gävle
Publisher(s)
Institute of Electrical and Electronics Engineers Inc.
Abstract
A general description of nonlinear dynamic MIMO systems, given by Volterra series, has significantly larger complexity than SISO systems. Modeling and predistortion of MIMO amplifiers consequently become unfeasible due to the large number of basis functions. We have designed digital predistorters for a MIMO amplifier using a basis pursuit method for reducing model complexity. This method reduces the numerical problems that appear in MIMO Volterra predistorters due to the large number of basis functions. The number of basis functions was reduced from 1402 to 220 in a 2×2 MIMO amplifier and from 127 to 13 in the corresponding SISO case. Reducing the number of basis functions caused an increase of approximately 1 dB of model error and adjacent channel power ratio.
Start page
833
End page
836
Language
English
OCDE Knowledge area
Sistemas de automatización, Sistemas de control
Subjects
Scopus EID
2-s2.0-84922721597
ISBN
9782874870354
ISBN of the container
978-287487035-4
Conference
European Microwave Week 2014: Connecting the Future, EuMW 2014 - Conference Proceedings; EuMC 2014: 44th European Microwave Conference
Sources of information:
Directorio de Producción Científica
Scopus