Title :
A design of predistortion HPA using frequency up-conversion mixing operation
Author :
Gyujae Seo ; Jeongho Kim ; Yongchae Jeong ; Kim, C.
Author_Institution :
Dept. of Inf. & Commun. Eng., Chonbuk Nat. Univ., Chonju, South Korea
Abstract :
In this paper, we propose a predistortion linearizing method using a frequency up-conversion operation. This method does not require any additional signal sources even using the mixing operation. This method uses the 2/sup nd/ low frequency intermodulation distortion signal of a driver amplifier as the mixing signal. With the proposed predistortion method, the (C/I)/sub 3rd/ of the amplifier is improved by 26 dB (@Po=22 dBm/tone), where the two tones are 1.8544 GHz and 1.8556 GHz.
Keywords :
UHF frequency convertors; UHF mixers; UHF power amplifiers; intermodulation distortion; linearisation techniques; 1.8544 GHz; 1.8556 GHz; 3G mobile radio standards; driver amplifier; frequency up-conversion mixing operation; predistortion HPA; predistortion linearizing method; second low frequency intermodulation distortion signal; Frequency conversion; Intermodulation distortion; Linearity; Nonlinear distortion; Power amplifiers; Predistortion; RF signals; Radio frequency; Radiofrequency amplifiers; Signal generators;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210606
