Title :
An Analytical Approach to LINC Power Combining Efficiency Estimation and Optimization
Author :
Birafane, A. ; Kouki, A.
Author_Institution :
LACIME - Ã\x89cole de Technologie Supérieure, 1100 Notre-Dame W., Montreal, QC, Canada, H3C 1K3. Email: abirafane@ele.etsmtl.ca, Phone: 514-396-8800 ext: 8975 - Fax: 514-396-8684
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 :
Amplitude modulation; Computational modeling; Equations; Linearity; Multiaccess communication; Phase modulation; Power amplifiers; Quadrature amplitude modulation; Radiofrequency amplifiers; Signal analysis;
Conference_Titel :
Microwave Conference, 2003 33rd European
Conference_Location :
Munich, Germany
Print_ISBN :
1-58053-834-7
DOI :
10.1109/EUMA.2003.340801
