INVESTIGADORES
GREGORIO Fernando Hugo
artículos
Título:
Broadband power amplifier nonlinearity cancellation in OFDM systems
Autor/es:
STEFAN WERNER; FERNANDO GREGORIO; JUAN COUSSEAU; JOSE FIGUEROA; RISTO WICHMAN
Revista:
Acta technica napocensis
Editorial:
Technical University of Cluj-Napoca, Faculty of Electronics, Telecommunications and Information
Referencias:
Año: 2008 vol. 49 p. 19 - 22
ISSN:
1221-6542
Resumen:
One drawback of OFDM systems is the high peak-to-average power ratio, which imposes strong requirements
on the linearity of power amplifiers (PAs). Such linearity requirements translate into high back-off that results in low power
efficiency. In order to improve power efficiency, a PA nonlinearity cancellation (PANC) technique is introduced which reduces
the nonlinear distortion effects on the received signal. In order to deal with broadband high-power PA (HPA) distortion, the
PANC technique employs aWiener-Hammerstein model. Simulation results show that good levels of distortion cancellation are
possible for a system with a nonlinear HPA with memory.
