Performance comparison of adaptive digital predistortion algorithms using adaptation time for mobile WiMAX power amplifier applications

Authors

JI-YEON KIM
JONG-HEON KIM

DOI

10.3906/elk-1412-87

Abstract

In this paper, we propose that adaptation time be considered a parameter for evaluating the performance of digital filter algorithms in adaptive digital predistorted high-power amplifiers. An adaptive predistorted high-power amplifier with an average power of 37.5 dBm was designed and fabricated for mobile worldwide interoperability for microwave access (WiMAX) test signals. For performance comparisons using adaptation time, several effective algorithms (such as the least-mean-squares (LMS), recursive-least-squares (RLS), and affine projection (AP) algorithms) were implemented. According to the experimental results, the RLS and AP algorithms achieved a similar linearity improvement of 11 dBr. However, the AP algorithm had the advantage of a faster adaptation time than the other algorithms.

Keywords

High power amplifier, linearization, digital predistortion, adaptive filter algorithm, mobile worldwide interoperability for microwave access

First Page

4098

Last Page

4104

Recommended Citation

KIM, JI-YEON and KIM, JONG-HEON (2016) "Performance comparison of adaptive digital predistortion algorithms using adaptation time for mobile WiMAX power amplifier applications," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 24: No. 5, Article 57. https://doi.org/10.3906/elk-1412-87
Available at: https://journals.tubitak.gov.tr/elektrik/vol24/iss5/57