Results 1 to 10 of about 1,234 (185)
Impact of Plasma Bubbles on OTHR Shortwave Propagation in Different Backgrounds
Remote SensingPlasma bubbles represent notable ionospheric irregularities primarily observed in low latitudes, characterized by plasma depletions exhibiting large spatial scales, which can make a significant impact on the propagation of OTHR (over-the-horizon radar ...
Xin Ma, Peng Guo, Mengjie Wu
exaly +6 more sources
Transient Interference Excision and Spectrum Reconstruction with Partial Samples Using Modified Alternating Direction Method of Multipliers-Net for the Over-the-Horizon Radar [PDF]
SensorsTransient interference often submerges the actual targets when employing over-the-horizon radar (OTHR) to detect targets. In addition, modern OTHR needs to carry out multi-target detection from sea to air, resulting in the sparse sampling of echo data ...
Zhang Man, Quan Huang, Jia Duan
doaj +3 more sources
Adaptive Processing Method for Interference Cancellation in Sky-Wave OTHR [PDF]
Journal of Engineering, 2019 An algorithm is proposed to cancel the spatially non-stationary high-frequency (HF) interference in the returns of sky-wave over-the-horizon radar (OTHR).
Dongdong Jia, Junhao Xie
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A solution for the over-the-horizon-radar simulator [PDF]
Vojnotehnički Glasnik, 2020 Introduction/purpose: The OTHR simulator presented in this paper is developed and used in practice, with the aim of emulating radar signal environment, but also optimizing the radar parameters in real applications such as: radiated power, antenna ...
Bojan R. Džolić +4 more
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OTHR-09 EPIDEMIOLOGY OF BRAIN TUMORS IN ZIMBABWE [PDF]
Neurooncol AdvAbstract OBJECTIVE Brain tumors, while rare, cause significant morbidity and mortality across all ages. This study was done to help understand the age and sex distribution of the common brain cancers diagnosed in Zimbabwe.
Chingonzo, Kuzivakwashe +3 more
europepmc +2 more sources
Impacts of Auroral Precipitation on HF Propagation: A Hypothetical Over‐the‐Horizon Radar Case Study [PDF]
Space Weather, 2021 Over‐the‐horizon radar (OTHR) systems operating in the high‐frequency (HF) band (3–30 MHz) are unique in their ability to detect targets at extreme ranges, offering cost‐effective large‐area surveillance. Due to their reliance on the reflective nature of
Joshua J. Ruck, David R. Themens
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Method to Suppress Transient Interference in Skywave OTHR
Electronics Letters, 2015 In skywave over‐the‐horizon radar (OTHR), transient interference is always suppressed with steps of interference localisation, corruption segment blanking and data restoration. The gapped data amplitude and phase estimation (GAPES) method has been proved to achieve good restoration performance.
Hongtao Su, Ziwei Liu, Qinzhen Hu
exaly +2 more sources
Two‐dimensional transmit arrays for polar over‐the‐horizon radar
IET Radar, Sonar & Navigation, 2021 Two‐dimensional (2‐D) transmit arrays offer many advantages over traditional over‐the‐horizon radar (OTHR) arrays, including the capability to steer and mitigate auroral clutter, a clutter type prevalent in polar operation, in all azimuth and elevation ...
Simon Henault, Ryan J. Riddolls
doaj +1 more source
IEEE Access, 2022 Over-the-horizon radar (OTHR) is an important equipment for the ultralong-range early warning in the military, but the use of constant false-alarm rate (CFAR), which is a traditional detection method, makes it difficult in multi-aircraft formation ...
Futai Liang +4 more
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OTHR multitarget tracking with a GMRF model of ionospheric parameters [PDF]
Signal Processing, 2021 The ionosphere is the propagation medium for radio waves transmitted by an over-the-horizon radar (OTHR). Ionospheric parameters, typically, virtual ionospheric heights (VIHs), are required to perform coordinate registration for OTHR multitarget tracking and localization.
Zhen Guo +4 more
openaire +4 more sources