Análise da PAPR em sistemas VFDM para rádio cognitivo

Abstract

VFDM(Vandermonde-subspace Frequency Division Multiplexing) is a recently proposed multicarrier modulation technique that works in a shared spectrum cognitive radio scenario to improve system spectral efficiency. A major problem in multicarrier modulations is the high PAPR (Peak Average Power Ratio), which can significantly deteriorate the transmitted signals due to the presence of nonlinear power amplifiers. The main objective of this paper is to carry out a study about the VFDM PAPR and the impact of this PAPR on the signal detection by means of computer simulations. The study will help us to indicate if a high PAPR is an important limiting factor on the performance of the VFDM.