@InProceedings{CavalcanteSilSouFonDua:2017:AqPaFr,
author = "Cavalcante, Hugo Rafael Gon{\c{c}}alves and Silveira, Luiz Felipe
de Queiroz and Souza, Samuel Xavier de and Fontes, Aluisio Igor
R{\^e}go and Duarte, Jos{\'e} Marcelo Lima",
affiliation = "{} and {} and {} and {} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Aquisi{\c{c}}{\~a}o paralela de frequ{\^e}ncia em sinais de
sat{\'e}lites de baixa {\'o}rbita baseada em correntropia",
booktitle = "Anais...",
year = "2017",
editor = "Gherardi, Douglas Francisco Marcolino and Arag{\~a}o, Luiz
Eduardo Oliveira e Cruz de",
pages = "6035--6042",
organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 18. (SBSR)",
publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
address = "S{\~a}o Jos{\'e} dos Campos",
abstract = "Low-earth orbit (LEO) satellites move at very high speeds and can
circumscribe the planet several times in a single day. These high
dynamics environments induce considerable Doppler shift and
Doppler rate values in the spatial communications signals, which
is known as dynamic Doppler shift. Establishing communication with
these systems is a multi-task process and, due to the dynamic
Doppler shift, a critical task is the fine acquisition of the
carrier frequency. Several studies have investigated frequency
estimation techniques of satellite signals, considering
communication environments characterized by additive white
Gaussian noise (AWGN). However, the effects of impulsive noise
should also be considered in a more accurate characterization of
the LEO satellite communication scenario. This work introduces a
new method of frequency acquisition for low-orbit satellites based
on a parallel search guided by correntropy coefficients. Due to
some of its properties, correntropy is very efficient in the
processing of non-Gaussian signals, especially in impulsive noise
environments. We investigate the robustness of the technique
proposed in this work on a communication environment characterized
by impulsive noise, and compare its performance with that obtained
by a classical approach, based on the correlation coefficient. In
addition, the proposed method uses parallel computing to reduce
processing time and increase its energy efficiency. The carrier
frequency acquisition method for LEO satellites proposed in this
work can be used in the development of a decoder for signals from
the Brazilian Environmental Data Collection System (SBCDA) and
ARGOS.",
conference-location = "Santos",
conference-year = "28-31 maio 2017",
isbn = "978-85-17-00088-1",
label = "59345",
language = "pt",
organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
ibi = "8JMKD3MGP6W34M/3PSMC6R",
url = "http://urlib.net/ibi/8JMKD3MGP6W34M/3PSMC6R",
targetfile = "59345.pdf",
type = "Sistemas de coleta de dados e telemetria",
urlaccessdate = "28 abr. 2024"
}