Title :
Two-dimensional crest factor reduction for performance improvement of concurrent dual-band power amplifiers
Author :
Xiaofan Chen ; Silong Zhang ; Wenhua Chen
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
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.
Keywords :
Long Term Evolution; UHF power amplifiers; 1D-CFR; 2D digital predistortion; 2D-CFR; 2D-DPD; concurrent dual-band LTE PA; concurrent dual-band power amplifiers; efficiency 28.1 percent to 30.6 percent; error vector magnitude; frequency 1.9 GHz to 2.6 GHz; two-dimensional crest factor reduction;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.1650
