Results 101 to 110 of about 188 (137)
HF-OTH Skywave Radar for Missile Detection [PDF]
, 2008 In this paper missile detection capabilities of an HF-OTH skywave will be analysed and assessed. Specifically we focus on a challenging scenarios that is the detection of ballistic missiles in their boost phase for early activation of defence systems. Missile Radar Cross Section (RCS) is calculated during target flight taking into account of frequency ...
BERIZZI, FABRIZIO +3 more
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Tsunami signature in the ionosphere: A simulation of OTH radar observations [PDF]
Radio Science, 2011 International audienceIn the last ten years ionospheric anomalies following major earthquakes and tsunamis have been detected. Global Positioning System (GPS) and altimeters have been proven effective for this purpose, through Total Electron Content (TEC)
Giovanni Occhipinti +2 more
exaly +2 more sources
A Simulation Framework for HF-OTH Skywave Radars: the Received Signal [PDF]
, 2007 This paper is focused on the analysis and the simulation of a model for the received signal of a HF-OTH skywave radar. More precisely, this work aims to identify and model the main components of a HF-OTH skywave radar received signal, in order to ...
BERIZZI, FABRIZIO +4 more
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Orthogonal waveform support in MIMO HF OTH radars
2007 International Waveform Diversity and Design Conference, 2007HF skywave radar performance and flexibility can benefit from transmission of multiple orthogonal waveforms in a multiple-input, multiple-output (MIMO) radar architecture. Several practical limitations need to be considered in such a design. One issue is that many HF radar transmit arrays are over-sampled spatially to allow for operation over a ...
Gordon J. Frazer +2 more
openaire +1 more source
HF-OTH Skywave Radar: A Method for Peak Power Evaluation
2006 International Radar Symposium, 2006This paper addresses the problem of peak power evaluation in HF OTH skywave radar. A wide number of factors affect the performance of such systems, specifically ionospheric propagation and absorption losses, as well as external radio noise interferences.
Capria A +3 more
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Modeling and performance of HF/OTH radar target classification systems
IEEE Transactions on Aerospace and Electronic Systems, 1992The effects of a class of multipath propagation channels on the performance of a over-the-horizon (OTH) radar target classification system are considered. A Rician frequency-selective fading channel model is employed to characterize the effects of the multipath propagation medium and evaluate the performance of radar target classification systems.
D.J. Strausberger +3 more
openaire +1 more source
Ship target detection for HF groundwave shipborne OTH radar
IEE Proceedings - Radar, Sonar and Navigation, 1999The spreading of the first order Bragg lines that result from movement of the radar platform will obscure targets with Doppler frequencies within the range of this spreading. This is the main difficulty for HF groundwave OTH radar in detecting ship targets in a shipboard environment. In the paper, the properties of the spread spectrum are analysed with
Gao Xingbin, Zong Chengge
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Consideration of reciprocal mixing in HF OTH radar design
7th International Conference on High Frequency Radio Systems and Techniques, 1997The purpose of this paper is to examine reciprocal mixing in the context of HF OTH radar, and to prescribe acceptable limits on phase noise spectral density which determine that the receiving system remains externally noise limited. The paper firstly describes the manner in which the fundamental sources of phase noise within a typical HF radar ...
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Detection, classification and correction of ionospheric distortion in HF skywave (OTH) radar systems
Proceedings of International Radar Conference, 2002HF skywave radar performance is often severely degraded by nonstationarity of the ionospheric propagation channel, so recognition and correction of distortion and contamination is a vital part of the radar signal processing sequence. As a consequence of the variety of physical mechanisms responsible for such degradation, a corresponding number of model-
S.J. Anderson, Y.I. Abramovich
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A ray tracing based method for coarse coordinate registration in HF skywave OTH radar [PDF]
, 2009 Over-the-horizon (OTH) radars use the refractive properties of high-frequency radiowave propagation through the ionosphere for wide-area surveillance at long ranges. Target detection is accomplished by tracking returns in slant range, Doppler and azimuth.
Cacciamano A +4 more
core +6 more sources