Title :
Polynomial 2.1 GHz RF predistorter IC with envelope injection output
Author :
Rahkonen, Timo ; Kursu, Olli ; Riikola, Marko ; Tuikkanen, Tapani
Author_Institution :
Dept. of Electr. Eng. & Inf. Technol., Oulu Univ., Finland
Abstract :
A polynomial RF predistorter IC and test setup for linearization experiments are presented. The system is aimed for UMTS applications in the 2.1 GHz hand. The output power of the linearization IC is ca. -10 dBm. The predistortion is generated by a complex-valued 5th-degree polynomial, and the circuit also includes a squared envelope output that can be used as an envelope injection signal. This envelope injection can be used to minimize the memory effects caused by frequency dependent biasing impedances around the RF power amplifier.
Keywords :
UHF integrated circuits; UHF power amplifiers; linearisation techniques; radiofrequency amplifiers; 2.1 GHz; RF power amplifier; UMTS applications; biasing impedances; envelope injection output; linearization integrated circuit; memory effects; polynomial RF predistorter integrated circuit; 3G mobile communication; Circuit testing; Frequency dependence; Integrated circuit testing; Polynomials; Power generation; Predistortion; Radio frequency; Radiofrequency integrated circuits; Signal generators;
Conference_Titel :
NORCHIP Conference, 2005. 23rd
Print_ISBN :
1-4244-0064-3
DOI :
10.1109/NORCHP.2005.1597031
