Title :
Spectral sensitivity of predistortion linearizer architectures to filter ripple
Author :
Shan, Weiyun ; Sundstr?¶m, Lars ; Shi, Bo
Author_Institution :
Dept. of Electroscience, Lund Univ., Sweden
fDate :
6/23/1905 12:00:00 AM
Abstract :
Multi-carrier power amplifiers (PA) used in cellular base stations have very high linearity requirement. Predistortion is a powerful method for linearization of RF PA. But linearity performance of a predistortion system is limited by various memory effects. We investigate the effects of filters between the predistorter and the PA. These effects are studied by means of analysis and simulation for multi-carrier signals. A method is developed that can be used to estimate the output spectrum based on the filter transfer function and the nonlinearity of the PA
Keywords :
cellular radio; linearisation techniques; power amplifiers; radiofrequency amplifiers; radiofrequency filters; spectral analysis; transfer functions; PA nonlinearity; RF power amplifiers; cellular base stations; filter ripple; filter transfer function; memory effects; multi-carrier signals; predistortion linearizer architectures; spectral sensitivity; spectrum estimation; Analytical models; Base stations; Filters; High power amplifiers; Linearity; Predistortion; Radio frequency; Radiofrequency amplifiers; Signal analysis; Transfer functions;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956462
