Open AccessImproved baseband digital predistortion for linearising PAs with nonlinear memory effects using linearly interpolated LUT
Author(s) -
Feng X.,
Feuvrie B.,
Descamps A.S.,
Wang Y.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.2458
Subject(s) - predistortion , lookup table , baseband , amplifier , computer science , computational complexity theory , interpolation (computer graphics) , linear interpolation , electronic engineering , quadrature amplitude modulation , algorithm , bandwidth (computing) , bit error rate , engineering , telecommunications , artificial intelligence , frame (networking) , pattern recognition (psychology) , programming language , decoding methods
An improved baseband digital predistortion (DPD) solution to reduce the nonlinearity of power amplifiers (PAs) with memory effects is proposed. It is based on the memory polynomial (MP) model and linearly interpolated look‐up table (LUT). This predistorter reduces significantly the computational time needed in MP based DPD by using a LUT. A linear interpolation technique is introduced to enhance the indexing of the LUT, such that good performance with small table size and low computational complexity is achieved. The proposed solution is validated on a test bench by using a PA ZFL‐2500 driven by a 16QAM modulated signal.