Results 111 to 120 of about 232 (143)
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Knowledge-Based Adaptive Processing for Ship Detection in OTH Radar
2006 International Radar Symposium, 2006This paper is concerned with adaptive Doppler processing in high frequency (HF) over-the-horizon (OTH) radar to improve the detection of slow-moving ships against clutter. A knowledge-based adaptive detection approach that exploits additional information to identify the surfaces that scatter clutter in each radar resolution cell (i.e. land, sea or land-
G. FABRIZIO, A. FARINA, DE MAIO, ANTONIO
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The Application ofAAl-digital Array Receiver to OTH Radar
2006 CIE International Conference on Radar, 2006An advanced all-digital array receiver is developed for Over-The-Horizon radar application. With a current commercially available ADC chip to digitize the amplified signal from HF antenna without the requirement of conventional receiver, it greatly simplified the design of array receiver, and excellent performance can be attained.
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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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OTH radar array calibration using disparate sources
Radar Systems (RADAR 97), 1997Errors in sensor positions, unknown mutual coupling and receiver gain/phase variations are known to degrade OTH radar array performance. Hence, for OTH radar currently being developed for coastal surveillance, which incorporate antenna arrays that can be erected quickly on unprepared sites, array calibration is essential. While gain/phase errors may be
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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
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Design and implementation of a fully automated OTH radar tracking system
Proceedings International Radar Conference, 2002Detection and tracking systems for OTH radars typically require manual oversight because of clutter, noise, and propagation conditions. The authors have designed and constructed a tracking system that eliminates this intervention. The system is based on a two-stage approach that detects low-SNR tracks in the raw data without amplitude-based peak ...
S.W. Shaw, J.F. Arnold
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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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Estimating the sensitivity and linearity requirements of an OTH radar receiving system
IEEE Aerospace and Electronic Systems Magazine, 2017A desirable goal for an over-the-horizon radar (OTHR) receiver chain is to avoid degradation of available signal to noise ratio over unused channels within a nominated band of interest. If there is a design requirement for the receiver to perform instantaneously wideband, this can present a significant challenge as the dynamic range of signals within ...
Rod I. Barnes, G. Fred Earl
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HF-OTH Skywave Radar for Missile Detection
2008In 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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Issues with Orthogonal Waveform Use in MIMO HF OTH Radars
2011Current operational HF over-the-horizon (OTH) radars are now accepted as effective and comparatively low-cost wide-area surveillance sensors. They are routinely used to provide air and surface situational awareness over vast regions of land and sea. The technology in, and performance of, these current generation radars is impressive, however, there are
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