Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Per-Olov Frolind"'
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 8, Pp 1217-1234 (2024)
Abstract A method is proposed for reconstructing an Orthogonal Frequency Division Multiplexing (OFDM) signal that contains data gaps, with the aim to improve demodulation. The main objective is to use the method in a passive radar application with mi
Externí odkaz:
https://doaj.org/article/d95188e9f1234c0eb2320827d3bd026b
Autor:
Per-Olov Frolind, Anders Gustavsson, Thomas K. Sjogren, Anders Haglund, Rolf Ragnarsson, Lars M. H. Ulander
Publikováno v:
2020 IEEE International Radar Conference (RADAR).
Synthetic-aperture radar (SAR) is normally used in an active mode for ground surveillance. Passive SAR has also been demonstrated using DVB-T (Digital Video Broadcasting – Terrestrial) signals from TV-broadcasting masts as illuminators of opportuni
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e72219a200982ca3f7e3f0bc2d66220f
https://doi.org/10.1109/radar42522.2020.9114844
https://doi.org/10.1109/radar42522.2020.9114844
Publikováno v:
IGARSS
Passive synthetic aperture radar using transmitters of opportunity can be used for remote sensing, using frequency bands that are not normally allowed for transmitting radars. Passive radars do not transmit but instead use signals from other transmit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9a2b71036f744f9efa029786f23e184
https://doi.org/10.1109/igarss.2019.8898806
https://doi.org/10.1109/igarss.2019.8898806
Autor:
LarsM. H. Ulander, Anders Gustavsson, Per-Olov Frolind, Albert R. Monteith, G. Stenstrom, Rolf Ragnarsson, Anders Haglund
Publikováno v:
IGARSS
BorealScat is a tower-based radar which measures multipolarization and tomographic backscatter time series data at a forest site in Southern Sweden. In this paper, we describe a methodology for absolute radiometric calibration of BorealScat and apply
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6801205c301d77325b7497a607f47edd
https://doi.org/10.1109/igarss.2019.8899069
https://doi.org/10.1109/igarss.2019.8899069
Publikováno v:
IGARSS
Passive SAR data have been registered using the airborne low frequency SAR system LORA. For this purpose, the radar sensor was reconfigured to not transmit any signals but only gather data along the pre-defined synthetic aperture. The receiver unit w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f758b9b8f2d7a770221ccd9b2738009f
https://doi.org/10.1109/igarss.2017.8127477
https://doi.org/10.1109/igarss.2017.8127477
Publikováno v:
2017 IEEE Radar Conference (RadarConf).
Air-to-ground surveillance requires using synthetic-aperture radar (SAR) technology for clutter reduction and for fulfilling resolution requirements. By using ultra-wideband VHF- and UHF-band SAR, detection of targets concealed by forests is enhanced
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e5cccbe5eabac9d2a1afbc7ef1fe339
https://doi.org/10.1109/radar.2017.7944211
https://doi.org/10.1109/radar.2017.7944211
Autor:
Per-Olov Frolind, Thomas K. Sjogren, Anders Gustavsson, Anders Haglund, Lars M. H. Ulander, Viet T. Vu, Rolf Ragnarsson, Mats I. Pettersson
Publikováno v:
International Conference on Radar Systems (Radar 2017).
Passive radar has been given much attention for many years. It has several advantages in comparison to active radar, such as possibility of lower cost sensors, ability to operate without disturbing the environment as well as allowing the radar covert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea5cef26d7c5f05cd96893db232195e6
https://doi.org/10.1049/cp.2017.0502
https://doi.org/10.1049/cp.2017.0502
Publikováno v:
International Conference on Radar Systems (Radar 2017).
Synthetic-aperture radar (SAR) provides images with high spatial resolution for ground surveillance applications. As is well known, intentional interference may limit this capability. Passive SAR, on the other hand, uses non-cooperative illuminators
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e4c555e06ba9a1e351c269d05deab3f
https://doi.org/10.1049/cp.2017.0458
https://doi.org/10.1049/cp.2017.0458
Autor:
Per-Olov Frolind
Publikováno v:
2016 IEEE Radar Conference (RadarConf).
Passive radar is an emerging technology for covert radar surveillance. It is based on using non-cooperative transmitters of opportunity, e.g. DVB-T signals used for digital TV broadcasting, and thus we also have to deal with bistatic geometries. Prom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99d0d75d605889b53b0b30806d539d47
https://doi.org/10.1109/radar.2016.7485125
https://doi.org/10.1109/radar.2016.7485125
Publikováno v:
IEEE Transactions on Geoscience and Remote Sensing. 50:1329-1339
Circular-aperture synthetic aperture radar (SAR) imaging has been evaluated using the airborne very high frequency (VHF) band Coherent All RAdio BAnd Sensing (CARABAS)-II system (20-90 MHz). Images, as well as results, from detection of vehicles in d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89187e0d74f51fcba9c923a006ca3bf0
https://doi.org/10.1109/tgrs.2011.2166081
https://doi.org/10.1109/tgrs.2011.2166081