A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band.
The real and imaginary parts of baseband signals are obtained from a real narrow–band signal by quadrature mixing, i.e. by mixing with cosine and sine signals at the narrow band’s selected center frequency. We address the consequences of a delay between the outputs of the quadrature mixer, which ari...
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European Geosciences Union
2005
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ftunivtroemsoe:oai:munin.uit.no:10037/547 2024-06-02T08:05:58+00:00 A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. Westman, A. Grydeland, Tom Belyey, Vasyl La Hoz, Cesar 2005-01-31 238480 bytes application/pdf https://hdl.handle.net/10037/547 eng eng European Geosciences Union Annales Geophysicae 23(2005) pp 39-46 1432-0576 (elektronisk) https://hdl.handle.net/10037/547 URN:NBN:no-uit_munin_374 openAccess Radio Science Ionosphere Instruments and techniques Auroral ionosphere Signal processing VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektromagnetisme akustikk optikk: 434 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Journal article Peer reviewed Tidsskriftartikkel 2005 ftunivtroemsoe 2024-05-07T08:40:37Z The real and imaginary parts of baseband signals are obtained from a real narrow–band signal by quadrature mixing, i.e. by mixing with cosine and sine signals at the narrow band’s selected center frequency. We address the consequences of a delay between the outputs of the quadrature mixer, which arise when digital samples of the quadrature baseband signals are not synchronised, i.e. when the real and imaginary components have been shifted by one or more samples with respect to each other. Through analytical considerations and simulations of such an error on different synthetic signals, we show how this error can be expected to afflict different measurements. In addition, we show the effect of the error on actual incoherent scatter radar data obtained by two different digital receiver systems used in parallel at the EISCAT Svalbard Radar (ESR). The analytical considerations indicate a procedure to correct the error, albeit with some limitations due to a small singular region. We demonstrate the correction procedure on actually afflicted data and compare the results to simultaneously acquired unafflicted data. We also discuss the possible data analysis strategies, including some that avoid dealing directly with the singular region mentioned above. Article in Journal/Newspaper EISCAT Svalbard University of Tromsø: Munin Open Research Archive Svalbard |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
Radio Science Ionosphere Instruments and techniques Auroral ionosphere Signal processing VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektromagnetisme akustikk optikk: 434 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
spellingShingle |
Radio Science Ionosphere Instruments and techniques Auroral ionosphere Signal processing VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektromagnetisme akustikk optikk: 434 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 Westman, A. Grydeland, Tom Belyey, Vasyl La Hoz, Cesar A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
topic_facet |
Radio Science Ionosphere Instruments and techniques Auroral ionosphere Signal processing VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Elektromagnetisme akustikk optikk: 434 VDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437 |
description |
The real and imaginary parts of baseband signals are obtained from a real narrow–band signal by quadrature mixing, i.e. by mixing with cosine and sine signals at the narrow band’s selected center frequency. We address the consequences of a delay between the outputs of the quadrature mixer, which arise when digital samples of the quadrature baseband signals are not synchronised, i.e. when the real and imaginary components have been shifted by one or more samples with respect to each other. Through analytical considerations and simulations of such an error on different synthetic signals, we show how this error can be expected to afflict different measurements. In addition, we show the effect of the error on actual incoherent scatter radar data obtained by two different digital receiver systems used in parallel at the EISCAT Svalbard Radar (ESR). The analytical considerations indicate a procedure to correct the error, albeit with some limitations due to a small singular region. We demonstrate the correction procedure on actually afflicted data and compare the results to simultaneously acquired unafflicted data. We also discuss the possible data analysis strategies, including some that avoid dealing directly with the singular region mentioned above. |
format |
Article in Journal/Newspaper |
author |
Westman, A. Grydeland, Tom Belyey, Vasyl La Hoz, Cesar |
author_facet |
Westman, A. Grydeland, Tom Belyey, Vasyl La Hoz, Cesar |
author_sort |
Westman, A. |
title |
A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
title_short |
A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
title_full |
A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
title_fullStr |
A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
title_full_unstemmed |
A procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
title_sort |
procedure to correct the effects of a relative delay between the quadrature components of radar signals at base band. |
publisher |
European Geosciences Union |
publishDate |
2005 |
url |
https://hdl.handle.net/10037/547 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
EISCAT Svalbard |
genre_facet |
EISCAT Svalbard |
op_relation |
Annales Geophysicae 23(2005) pp 39-46 1432-0576 (elektronisk) https://hdl.handle.net/10037/547 URN:NBN:no-uit_munin_374 |
op_rights |
openAccess |
_version_ |
1800750855895384064 |