Title :
Performance improvement from linearizing power amplifiers in multi-port amplifier subsystems
Author :
Huang, Xinping ; Caron, Mario
Author_Institution :
Commun. Res. Centre Canada, Ottawa, ON
Abstract :
In communication systems employing multiple beam antennas, multi-port amplifiers (MPA) offer a flexibility of allocating/moving power or capacity among beams easily, to maximize the usage of the total capacity available, assuming that power amplifiers (PA) are linear. In this paper, we show that when the PAs are nonlinear, the MPA performance is severely limited due to the PAspsila nonlinearity, and we demonstrate that power efficiency and system performance can be significantly improved by linearizing the PAs.
Keywords :
antenna arrays; linearisation techniques; multiport networks; power amplifiers; linearization; multi-port amplifier subsystems; multiple beam antennas; nonlinear power amplifiers; performance improvement; power efficiency; Computer simulation; Couplers; Directional antennas; Equations; Frequency conversion; Performance gain; Power amplifiers; Predistortion; System performance; Transfer functions; Linearization; Multi-port power amplifiers; Nonlinear power amplifiers; Predistortion;
Conference_Titel :
Signal Processing for Space Communications, 2008. SPSC 2008. 10th International Workshop on
Conference_Location :
Rhodes Island
Print_ISBN :
978-1-4244-2572-3
Electronic_ISBN :
978-1-4244-2573-0
DOI :
10.1109/SPSC.2008.4686726
