Two-dimensional crest factor reduction for performance improvement of concurrent dual-band power amplifiers

Abstract

A two-dimensional crest factor reduction (2D-CFR) is proposed to improve the performance of concurrent dual-band power amplifiers (PAs). Experimental measurements are performed on a 1.9-2.6 GHz concurrent dual-band LTE PA by using the proposed 2D-CFR and conventional 1D-CFR, respectively. Measured results after 2D digital predistortion (2D-DPD) show that the output power with the proposed 2D-CFR is increased by 10%, the efficiency is improved from 28.1 to 30.6% and the error vector magnitude is reduced from 3.46 to 2.67%, indicating a significant performance improvement. © The Institution of Engineering and Technology 2013.