Measurement and modeling of HF channel directional spread characteristics for northerly paths
[1] 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 s...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1076.1505 2023-05-15T17:03:59+02:00 Measurement and modeling of HF channel directional spread characteristics for northerly paths E M Warrington A J Stocker D R Siddle The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1076.1505 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1076.1505 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://lra.le.ac.uk/bitstream/2381/2008/1/2005RS003294.pdf text 2006 ftciteseerx 2020-04-26T00:30:37Z [1] 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. Text Kirkenes Kiruna Svalbard Unknown Kiruna Norway Svalbard |
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ftciteseerx |
language |
English |
description |
[1] 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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
E M Warrington A J Stocker D R Siddle |
spellingShingle |
E M Warrington A J Stocker D R Siddle Measurement and modeling of HF channel directional spread characteristics for northerly paths |
author_facet |
E M Warrington A J Stocker D R Siddle |
author_sort |
E M Warrington |
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 |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1076.1505 |
geographic |
Kiruna Norway Svalbard |
geographic_facet |
Kiruna Norway Svalbard |
genre |
Kirkenes Kiruna Svalbard |
genre_facet |
Kirkenes Kiruna Svalbard |
op_source |
https://lra.le.ac.uk/bitstream/2381/2008/1/2005RS003294.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1076.1505 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766057984010485760 |