Measurement and modeling of HF channel directional spread characteristics for northerly paths
The northerly ionosphere is a dynamic propagation medium that causes HF signals reflected from this region to exhibit delay spreads and Doppler shifts and spreads that significantly exceed those observed over midlatitude paths. Since the ionosphere is not perfectly horizontally stratified, the signa...
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American Geophysical Union (AGU), Wiley, International Union of Radio Science
2012
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Online Access: | http://hdl.handle.net/2381/12904 http://onlinelibrary.wiley.com/doi/10.1029/2005RS003294/abstract https://doi.org/10.1029/2005RS003294 |
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ftleicester:oai:lra.le.ac.uk:2381/12904 2023-05-15T17:03:59+02:00 Measurement and modeling of HF channel directional spread characteristics for northerly paths Warrington, E. M. Stocker, A. J. Siddle, D. R. 2012-10-24T08:55:46Z http://hdl.handle.net/2381/12904 http://onlinelibrary.wiley.com/doi/10.1029/2005RS003294/abstract https://doi.org/10.1029/2005RS003294 unknown American Geophysical Union (AGU), Wiley, International Union of Radio Science Radio Science, 2006, 41 (2) 0048-6604 http://hdl.handle.net/2381/12904 http://onlinelibrary.wiley.com/doi/10.1029/2005RS003294/abstract doi:10.1029/2005RS003294 1944-799X Archived with reference to SHERPA/RoMEO and publisher website. Scopus http://www.scopus.com/home.url Journal Article 2012 ftleicester https://doi.org/10.1029/2005RS003294 2019-03-22T20:15:20Z The northerly ionosphere is a dynamic propagation medium that causes HF signals reflected from this region to exhibit delay spreads and Doppler shifts and spreads that significantly exceed those observed over midlatitude paths. Since the ionosphere is not perfectly horizontally stratified, the signals associated with each propagation mode may arrive at the receiver over a range of angles in both azimuth and elevation. Such large directional spreads may have a severe impact on radio systems employing multielement antenna arrays and associated signal-processing techniques since the signal environment does not comprise a small number of specular components as often assumed by the processing algorithms. In order to better understand the directional characteristics of HF signals reflected from the northerly ionosphere, prolonged measurements have recently been made over two paths: (1) from Svalbard to Kiruna, Sweden, and (2) from Kirkenes, Norway, to Kiruna. An analysis of these data is presented in this paper. The directional characteristics are summarized, and consideration is given to modeling the propagation effects in the form of a channel simulator suitable for the testing of new equipment and processing algorithms. The authors are grateful for the support of the EPSRC under grant GR/M35025. 112229 Article in Journal/Newspaper Kirkenes Kiruna Svalbard University of Leicester: Leicester Research Archive (LRA) Svalbard Kiruna Norway Radio Science 41 2 n/a n/a |
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Open Polar |
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University of Leicester: Leicester Research Archive (LRA) |
op_collection_id |
ftleicester |
language |
unknown |
description |
The northerly ionosphere is a dynamic propagation medium that causes HF signals reflected from this region to exhibit delay spreads and Doppler shifts and spreads that significantly exceed those observed over midlatitude paths. Since the ionosphere is not perfectly horizontally stratified, the signals associated with each propagation mode may arrive at the receiver over a range of angles in both azimuth and elevation. Such large directional spreads may have a severe impact on radio systems employing multielement antenna arrays and associated signal-processing techniques since the signal environment does not comprise a small number of specular components as often assumed by the processing algorithms. In order to better understand the directional characteristics of HF signals reflected from the northerly ionosphere, prolonged measurements have recently been made over two paths: (1) from Svalbard to Kiruna, Sweden, and (2) from Kirkenes, Norway, to Kiruna. An analysis of these data is presented in this paper. The directional characteristics are summarized, and consideration is given to modeling the propagation effects in the form of a channel simulator suitable for the testing of new equipment and processing algorithms. The authors are grateful for the support of the EPSRC under grant GR/M35025. 112229 |
format |
Article in Journal/Newspaper |
author |
Warrington, E. M. Stocker, A. J. Siddle, D. R. |
spellingShingle |
Warrington, E. M. Stocker, A. J. Siddle, D. R. Measurement and modeling of HF channel directional spread characteristics for northerly paths |
author_facet |
Warrington, E. M. Stocker, A. J. Siddle, D. R. |
author_sort |
Warrington, E. M. |
title |
Measurement and modeling of HF channel directional spread characteristics for northerly paths |
title_short |
Measurement and modeling of HF channel directional spread characteristics for northerly paths |
title_full |
Measurement and modeling of HF channel directional spread characteristics for northerly paths |
title_fullStr |
Measurement and modeling of HF channel directional spread characteristics for northerly paths |
title_full_unstemmed |
Measurement and modeling of HF channel directional spread characteristics for northerly paths |
title_sort |
measurement and modeling of hf channel directional spread characteristics for northerly paths |
publisher |
American Geophysical Union (AGU), Wiley, International Union of Radio Science |
publishDate |
2012 |
url |
http://hdl.handle.net/2381/12904 http://onlinelibrary.wiley.com/doi/10.1029/2005RS003294/abstract https://doi.org/10.1029/2005RS003294 |
geographic |
Svalbard Kiruna Norway |
geographic_facet |
Svalbard Kiruna Norway |
genre |
Kirkenes Kiruna Svalbard |
genre_facet |
Kirkenes Kiruna Svalbard |
op_source |
Scopus http://www.scopus.com/home.url |
op_relation |
Radio Science, 2006, 41 (2) 0048-6604 http://hdl.handle.net/2381/12904 http://onlinelibrary.wiley.com/doi/10.1029/2005RS003294/abstract doi:10.1029/2005RS003294 1944-799X |
op_rights |
Archived with reference to SHERPA/RoMEO and publisher website. |
op_doi |
https://doi.org/10.1029/2005RS003294 |
container_title |
Radio Science |
container_volume |
41 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766057984559939584 |