@Article{BerganoRCBVVRS:2016:HiPeCo,
author = "Bergano, Miguel and Rocha, Armando and Cupido, Luis and Barbosa,
Domingos and Villela, Thyrso and Vilas Boas, Jos{\'e} Williams
dos Santos and Rocha, Gra{\c{c}}a and Smoot, George F.",
affiliation = "{University of Aveiro} and {University of Aveiro} and
LC-Technologies and {University of Aveiro} and {Instituto Nacional
de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Jet Propulsion Laboratory} and
{Lawrence Berkeley National Laboratory}",
title = "A high performance cost-effective digital complex correlator for
an X-band polarimetry survey",
journal = "Springer Plus",
year = "2016",
volume = "5",
number = "1",
pages = "487",
month = "Dec.",
keywords = "Logic design (hardware), Radioastronomy (astronomy, astrophysics
and cosmology), Register-transfer-level implementation
(hardware).",
abstract = "The detailed knowledge of the Milky Way radio emission is
important to characterize galactic foregrounds masking
extragalactic and cosmological signals. The update of the global
sky models describing radio emissions over a very large spectral
band requires high sensitivity experiments capable of observing
large sky areas with long integration times. Here, we present the
design of a new 10 GHz (X-band) polarimeter digital back-end to
map the polarization components of the galactic synchrotron
radiation field of the Northern Hemisphere sky. The design follows
the digital processing trends in radio astronomy and implements a
large bandwidth (1 GHz) digital complex cross-correlator to
extract the Stokes parameters of the incoming synchrotron
radiation field. The hardware constraints cover the implemented
VLSI hardware description language code and the preliminary
results. The implementation is based on the simultaneous digitized
acquisition of the Cartesian components of the two linear receiver
polarization channels. The design strategy involves a double data
rate acquisition of the ADC interleaved parallel bus, and field
programmable gate array device programming at the register
transfer mode. The digital core of the back-end is capable of
processing 32 Gbps and is built around an Altera field
programmable gate array clocked at 250 MHz, 1 GSps analog to
digital converters and a clock generator. The control of the field
programmable gate array internal signal delays and a convenient
use of its phase locked loops provide the timing requirements to
achieve the target bandwidths and sensitivity. This solution is
convenient for radio astronomy experiments requiring large
bandwidth, high functionality, high volume availability and low
cost. Of particular interest, this correlator was developed for
the Galactic Emission Mapping project and is suitable for large
sky area polarization continuum surveys. The solutions may also be
adapted to be used at signal processing subsystem levels for large
projects like the square kilometer array testbeds.",
doi = "10.1186/s40064-016-2109-5",
url = "http://dx.doi.org/10.1186/s40064-016-2109-5",
issn = "2193-1801",
language = "en",
targetfile = "bergano_high.pdf",
urlaccessdate = "27 abr. 2024"
}