DocumentCode :
3307649
Title :
RF solid state power amplifier linearization using unbalanced parallel predistortion structure
Author :
Wen-Jie, Mao ; Li-Xing, Ran ; Kang-Shen, Chen
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China
fYear :
2002
fDate :
17-19 Aug. 2002
Firstpage :
940
Lastpage :
943
Abstract :
Presents an improved adaptive RF predistortion method used for linearization of solid state power amplifier (SSPA). This proposed technique is based on a predistortion circuit, whose AM/AM and AM/PM response are separately implemented as polynomial approximations of the respective responses of the ideal linearizer. Unlike other RF predistorters, the polynomial complexity of two branches is unbalanced based on difference of amplitude and phase nonlinearity. Adaptation is accomplished by iterative adjustment of predistorter parameters to minimize the adjacent channel interference (ACI) power and a simple secant optimization way is used. The simulation result shows this scheme attains similar performance compared with other well-known RF predistortion method but reduces the implementation complexity.
Keywords :
UHF circuits; UHF power amplifiers; adjacent channel interference; distortion; iterative methods; polynomial approximation; AM/AM response; AM/PM response; RF solid state power amplifier; adaptive RF predistortion method; adjacent channel interference; iterative adjustment; polynomial approximations; power amplifier linearization; secant optimization; unbalanced parallel predistortion structure; Baseband; Interchannel interference; Nonlinear distortion; Polynomials; Power amplifiers; Predistortion; Radio frequency; Radiofrequency amplifiers; Signal generators; Solid state circuits;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on
Print_ISBN :
0-7803-7486-X
Type :
conf
DOI :
10.1109/ICMMT.2002.1187857
Filename :
1187857
Link To Document :
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