Title :
Distortion correction of LDMOS power amplifiers using hybrid RF second harmonic injection/digital predistortion linearization
Author :
Koulouzis, H. ; Budimir, D.
Author_Institution :
Dept. of Electron. Syst., Westminster Univ., London
Abstract :
An LDMOS RF power amplifier for RF multichannel wireless systems with improved IMD performance characteristics is presented. The application of two combined linearization methods is being tested with the help of circuit simulation software ADS. The injection of the fundamental signal´s second harmonic in the RF amplifier, as well as a digital predistortion technique, is combined in order to achieve IMD improvement. By proper selection of phase and amplitude of the injected second harmonic signal, it is possible to reduce IMD products that have already been reduced by the well established method of digital predistortion
Keywords :
MOS analogue integrated circuits; circuit simulation; harmonic distortion; intermodulation distortion; linearisation techniques; power amplifiers; radiofrequency amplifiers; radiofrequency integrated circuits; wireless channels; LDMOS power amplifiers; RF multichannel wireless systems; circuit simulation software ADS; digital predistortion linearization; digital predistortion technique; distortion correction; hybrid RF second harmonic injection; injected second harmonic signal; Application software; Circuit simulation; Circuit testing; Harmonic distortion; Power amplifiers; Power system harmonics; Predistortion; Radio frequency; Radiofrequency amplifiers; Software testing; Intermodulation distortion; LDMOS; RF power amplifiers; digital predistortion;
Conference_Titel :
Electrotechnical Conference, 2006. MELECON 2006. IEEE Mediterranean
Conference_Location :
Malaga
Print_ISBN :
1-4244-0087-2
DOI :
10.1109/MELCON.2006.1653065
