Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion
The standard analysis of Barker-coded incoherent scatter experiments is based on a matched filter with an impulse response which is a mirror image of the code itself. The method produces small sidelobes which cause contamination from regions outside the nominal range gate. A corresponding effect is...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00035073 2023-05-15T16:04:46+02:00 Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion Damtie, B. Lehtinen, M. S. Nygrén, T. 2004-01 electronic https://doi.org/10.5194/angeo-22-3-2004 https://noa.gwlb.de/receive/cop_mods_00035073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035027/angeo-22-3-2004.pdf https://angeo.copernicus.org/articles/22/3/2004/angeo-22-3-2004.pdf eng eng Copernicus Publications Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-22-3-2004 https://noa.gwlb.de/receive/cop_mods_00035073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035027/angeo-22-3-2004.pdf https://angeo.copernicus.org/articles/22/3/2004/angeo-22-3-2004.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2004 ftnonlinearchiv https://doi.org/10.5194/angeo-22-3-2004 2022-02-08T22:44:56Z The standard analysis of Barker-coded incoherent scatter experiments is based on a matched filter with an impulse response which is a mirror image of the code itself. The method produces small sidelobes which cause contamination from regions outside the nominal range gate. A corresponding effect is also encountered in the lag direction, where individual lag estimates are biased by the variation of the plasma autocorrelation function around the nominal lag value. The present paper introduces a new method of analysing Barker-coded experiments by means of stochastic inversion. Since it does not apply a decoding filter, it does not suffer from drawbacks caused by the sidelobes of the range ambiguity function. The method combines the profile of each full lag and a number of surrounding fractional lags into a single inversion problem. Error analysis also indicates that the statistical accuracy given by inversion is better than that obtained by means of standard decoding. Furthermore, the inversion method gives a possibility to reduce the bias due to the variation of the autocorrelation around the nominal lag. In this paper the method is described and applied to data obtained by means of the EISCAT Svalbard radar. In addition, it is shown that mathematical inversion can be used instead of the the conventional height integration. Key words. Radio science (ionospheric physics; signal processing; instruments and techniques) Article in Journal/Newspaper EISCAT Svalbard Niedersächsisches Online-Archiv NOA Svalbard Annales Geophysicae 22 1 3 13 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Damtie, B. Lehtinen, M. S. Nygrén, T. Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
topic_facet |
article Verlagsveröffentlichung |
description |
The standard analysis of Barker-coded incoherent scatter experiments is based on a matched filter with an impulse response which is a mirror image of the code itself. The method produces small sidelobes which cause contamination from regions outside the nominal range gate. A corresponding effect is also encountered in the lag direction, where individual lag estimates are biased by the variation of the plasma autocorrelation function around the nominal lag value. The present paper introduces a new method of analysing Barker-coded experiments by means of stochastic inversion. Since it does not apply a decoding filter, it does not suffer from drawbacks caused by the sidelobes of the range ambiguity function. The method combines the profile of each full lag and a number of surrounding fractional lags into a single inversion problem. Error analysis also indicates that the statistical accuracy given by inversion is better than that obtained by means of standard decoding. Furthermore, the inversion method gives a possibility to reduce the bias due to the variation of the autocorrelation around the nominal lag. In this paper the method is described and applied to data obtained by means of the EISCAT Svalbard radar. In addition, it is shown that mathematical inversion can be used instead of the the conventional height integration. Key words. Radio science (ionospheric physics; signal processing; instruments and techniques) |
format |
Article in Journal/Newspaper |
author |
Damtie, B. Lehtinen, M. S. Nygrén, T. |
author_facet |
Damtie, B. Lehtinen, M. S. Nygrén, T. |
author_sort |
Damtie, B. |
title |
Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
title_short |
Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
title_full |
Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
title_fullStr |
Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
title_full_unstemmed |
Decoding of Barker-coded incoherent scatter measurements by means ofmathematical inversion |
title_sort |
decoding of barker-coded incoherent scatter measurements by means ofmathematical inversion |
publisher |
Copernicus Publications |
publishDate |
2004 |
url |
https://doi.org/10.5194/angeo-22-3-2004 https://noa.gwlb.de/receive/cop_mods_00035073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035027/angeo-22-3-2004.pdf https://angeo.copernicus.org/articles/22/3/2004/angeo-22-3-2004.pdf |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.5194/angeo-22-3-2004 https://noa.gwlb.de/receive/cop_mods_00035073 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00035027/angeo-22-3-2004.pdf https://angeo.copernicus.org/articles/22/3/2004/angeo-22-3-2004.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/angeo-22-3-2004 |
container_title |
Annales Geophysicae |
container_volume |
22 |
container_issue |
1 |
container_start_page |
3 |
op_container_end_page |
13 |
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1766400395109728256 |