Results 111 to 120 of about 618,348 (165)

Detection Performance of MIMO-OTH Radar: Advantages of Multipath Ionospheric Propagation

2012 IEEE 12th International Conference on Computer and Information Technology, 2012
Multipath ionospheric propagation (MIP), a typical phenomenon the sky wave over-the-horizon (OTH) radar may encounter, is often viewed as an annoying factor to be eliminated in the traditional OTH radars. In this paper, we consider multiple-input multiple-output sky wave over-the-horizon (MIMO-OTH) radar with closely spaced antennas.
Qian He, Zishu He
exaly   +2 more sources

OTH radar phenomenology: signal interpretation and target characterization at HF

IEEE Aerospace and Electronic Systems Magazine, 2017
Implicitly or explicitly, the extraction of information from radar echoes is based on a physical model of the interaction between the radar system and the target, the study of which is sometimes referred to as radar phenomenology [1]. It follows that the detail and fidelity of the physical model determine the prospective observables, the accuracy of ...
Stuart Anderson
exaly   +2 more sources

Inversion of OTH radar backscatter ionograms obtained by scanning in elevation

2008 IEEE Radar Conference, 2008
A new inversion method to obtain the real state of the ionosphere with an oblique sounder is presented. This method takes some points on the backscatter ionogram obtained by scanning in elevation to estimate the parameters of the electronic density profile of the ionosphere.
E Benito
exaly   +3 more sources

HF-OTH Skywave Radar for Missile Detection

, 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, DALLE MESE, ENZO, CAPRIA, AMERIGO, Soleti, R.   +3 more
openaire   +2 more sources

Performance of OTH radar array calibration

Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181), 2002
Array calibration algorithms for over-the-horizon (OTH) radar arrays have been proposed in the literature. These algorithms perform array calibration by using echoes from ionised meteor trails, and estimate sensor position errors and mutual coupling. We derive the Cramer-Rao performance bound for this array calibration problem and then investigate the ...
I. S. D. Solomon, Yuri I. Abramovich, Douglas A. Gray 0001, Stuart J. Anderson   +3 more
openaire   +2 more sources

Sources for OTH radar array calibration

IEEE Antennas and Propagation Society International Symposium 1997. Digest, 2002
Modern over-the-horizon (OTH) radars currently being developed for coastal surveillance incorporate antenna arrays which are to be erected quickly with minimal site preparation. For such arrays, array calibration is necessary. Meteors, noise sources and beacons (special sources) may be used for calibrating these OTH radars.
I.S.D. Solomon, D.A. Gray, Yu.I. Abramovich   +2 more
openaire   +1 more source

On model identification for distortion correction of OTH radar signals

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
When HF skywave radars are employed for missions where high Doppler resolution is required, such as ship detection or remote sensing of the sea surface, nonstationarity of the ionospheric propagation channel within the coherent integration period often occurs to the extent that the Doppler spectrum is corrupted and the mission is unsuccessful.
Stuart J. Anderson, Susan E. Godfrey, S. M. Voigt   +2 more
openaire   +1 more source

Exterior noise adaptive rejection for OTH radar implementations

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
A new class of nonstationary adaptive techniques is proposed to put up with clutter distortions originated from the current pattern readjustment, caused by the temporal perturbations of the jammer spatial covariance matrix. To introduce this approach we describe, by using the scalar-type vector-valued autoregressive model the inter-repetition sequence ...
Yuri I. Abramovich, Alexei Gorokhov, V. N. Mikhaylyukov, I. P. Malyavin   +3 more
openaire   +2 more sources

Spatial adaptive subspace detection in OTH radar

IEEE Transactions on Aerospace and Electronic Systems, 2003
The work presented here addresses the problem of target detection against spatially structured interference composed of jamming plus noise, where for practical reasons, the received target wavefront may also deviate from the traditional plane wave model.
G.A. Fabrizio, A. Farina, A. Marconi, M.D. Turley   +3 more
openaire   +1 more source

Knowledge-based signal processing in OTH radar

Proceedings of 2011 IEEE CIE International Conference on Radar, 2011
This paper is concerned with knowledge-based processing technique in high-frequency over the horizon radar (OTHR) to improve radar performance. Knowledge-based processing technique is proposed to increase target detection probability, reduce false alarm in heavy clutter, correct target measurement error and assess battlefield situation.
null Lei Zhiyong, null Ni Jin
openaire   +1 more source