Title :
An analytical approach to LINC power combining efficiency estimation and optimization
Author :
Birafane, A. ; Kouki, A.
Author_Institution :
LACIME, Ecole de Technol. Superieure, Montreal, Que., Canada
Abstract :
A new approach for studying the combiner efficiency in a LINC amplifier based on analytical expressions of the instantaneous combiner efficiency and the signal´s probability distribution function (PDF) is proposed. The analytical expressions, derived for both a matched combiner and a Chirex outphasing combiner, are applied to compute the combiner efficiency of a LINC amplifier under CDMA and 64QAM signals. A direct approach to determining the optimal shunt reactance used in an outphasing combiner is also proposed and applied to both signals. Validation with a commercial simulator is given.
Keywords :
code division multiple access; power amplifiers; quadrature amplitude modulation; CDMA; linear amplification nonlinear component power; optimal shunt reactance; power amplifer; power combining efficiency; quadrature amplitude modulation; signals probability distribution function; Amplitude modulation; Circuit simulation; Computational modeling; Equations; Linearity; Multiaccess communication; Phase modulation; Power amplifiers; Quadrature amplitude modulation; Signal analysis;
Conference_Titel :
Microwave Conference, 2003. 33rd European
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMC.2003.1262878
