Zobrazeno 1 - 10
of 37
pro vyhledávání: '"T. Sparr"'
Publikováno v:
IET Radar, Sonar & Navigation. 6:803-812
Matched filter concepts are extensively used in radar applications to maximise target detection. Usually, the receiver filter is matched to the transmitted signal, which is optimum for a point target return. For extended targets it is possible to do
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63414b7cc3295ff804125e995f47694c
https://doi.org/10.1049/iet-rsn.2012.0099
https://doi.org/10.1049/iet-rsn.2012.0099
Autor:
K. Mamen, K. Ytre-Arne, Ivar Sønbø Kristiansen, Ragnar Hotvedt, A.C. Magnus, Olav Helge Førde, S.M. Almdahl, L. Berge, J. Thoner, T. Sparr, G. Bjørsvik
Publikováno v:
The Lancet. 347:1362-1366
Summary Background The evacuation of emergency cases by air, usually by helicopter, is controversial because of the cost of the programme, the possibility of an accident (especially in an urban area), and unproven benefit. But such evacuations cannot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e00f8dd28ad4b96f7ce8da36209ab3a1
https://doi.org/10.1016/s0140-6736(96)91010-7
https://doi.org/10.1016/s0140-6736(96)91010-7
Publikováno v:
2008 IEEE Radar Conference.
The geometry of inverse synthetic aperture radar (ISAR) imaging suggests in principle a tomographic approach to the reconstruction of a 2D projection of an object illuminated by a radar signal. In theory this is straight forward, but the computationa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb645548e2cfffbf9a91e8b8617f69b9
https://doi.org/10.1109/radar.2008.4721025
https://doi.org/10.1109/radar.2008.4721025
Publikováno v:
IET International Conference on Radar Systems 2007.
Shadow cast by features on ground can be an important aid in object classification in synthetic aperture radar (SAR) images. Synthetic aperture imaging causes a fundamental limitation to shadow clarity due to the fact that the illuminator is moved du
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e82a12929dd38b1128d5f2be6e5fb764
https://doi.org/10.1049/cp:20070574
https://doi.org/10.1049/cp:20070574
Autor:
T. Sparr
Publikováno v:
IEEE International Radar Conference, 2005..
The phase history for a target with general motion can be calculated fairly simply when the SAR system moves along a straight line, and when the motion is reasonably small. The resulting phase history is a sum of two terms: one term depends directly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc1a673fc12e5c39d2bba61588cf9dca
https://doi.org/10.1109/radar.2005.1435836
https://doi.org/10.1109/radar.2005.1435836
Autor:
T. Sparr
Publikováno v:
ICIP
ISAR imaging is described for general motion of a radar target. ISAR imaging may be seen as a 3D to 2D projection, and the importance of the ISAR image projection plane is stated. For general motion, ISAR images are often smeared when using FFT proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfb019eea03390e1e970ea8084cdeb05
https://doi.org/10.1109/icip.2004.1418675
https://doi.org/10.1109/icip.2004.1418675
Publikováno v:
Record of the IEEE 2000 International Radar Conference [Cat. No. 00CH37037].
Inverse synthetic aperture radar imaging may be seen as a 3D-to-2D projection of the target. The projection plane is shown to be determined by the effective rotation of the target as seen from the radar. Two images formed from similar radar data are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9227241016e29d3a974b0d63e598ef9
https://doi.org/10.1109/radar.2000.851877
https://doi.org/10.1109/radar.2000.851877
Publikováno v:
Electronics Letters. 43:308
A method called fixed focus shadow enhancement is proposed. The purpose is to sharpen target shadows in synthetic aperture radar images. The method applies a fixed focus range to a given target, resulting in a sharp target image and a sharp target sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54814fc8b6ee72aa75e0a0d22e4f25bc
https://doi.org/10.1049/el:20073883
https://doi.org/10.1049/el:20073883
Publikováno v:
IEE Proceedings - Radar, Sonar and Navigation. 150:173
Vibrating targets may cause azimuth smearing in airborne synthetic aperture radar (SAR) images. Any motion of a reflector during the coherent integration time of a SAR image causes a phase modulation in the corresponding reflector phase history. For
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80c37613b1e48073359c993a1cf3d098
https://doi.org/10.1049/ip-rsn:20030447
https://doi.org/10.1049/ip-rsn:20030447
Publikováno v:
IEE Proceedings - Radar, Sonar and Navigation. 150:277
Vibrating targets cause phase modulation of the azimuth phase history for a SAR system. The phase modulation may be seen as a time-dependent micro-Doppler frequency. It is useful to analyse such signals with Cohen's class time - frequency methods due
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::621ebee728c6360739248e7b7ffadd75
https://doi.org/10.1049/ip-rsn:20030697
https://doi.org/10.1049/ip-rsn:20030697