Results 141 to 150 of about 21,397 (182)

Orthogonal waveform support in MIMO HF OTH radars

2007 International Waveform Diversity and Design Conference, 2007
HF 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, Ben A. Johnson, Yuri I. Abramovich   +2 more
openaire   +2 more sources

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 ...
Yu.I. Abramovich, A.Yu. Gorokhov, V.N. Mikhaylyukov, I.P. Malyavin   +3 more
openaire   +1 more source

A General Presentation About the OTH-Radar NOSTRADAMUS

2006 IEEE Conference on Radar, 2006
ONERA, funded by the French Ministry of Defence has conducted the realization and experimentations of the Doppler Skywave OTH Radar called NOSTRADAMUS. One of the main characteristic of Skywave OTH Radar is the dependence to the ionosphere for successful operation.
V. Bazin, J.P. Molinie, J. Munoz, P. Dorey, S. Saillant, G. Auffray, V. Rannou, M. Lesturgie   +7 more
openaire   +1 more source

Key Challenges in True Multistatic OTH Radar Concepts based on HF-Radar in iFURTHER

2024 International Radar Conference (RADAR)
Dominik Bok, Philippe Brouard, Anna Lisa Saverino, Amerigo Capria, Karol Abratkiewicz, Jean-Philippe Molinié, Iole Pisciottano, Alessandro Ippolito, Piotr Samczyński, Simon Vandewalle, José-Luis Bárcena-Humanes, Javier Rosado-Sanz, María Del Pilar Jarabo-Amores   +12 more
openaire   +3 more sources

Analysis of sea clutter in distributed shipborne OTH radar

IET Conference Publications, 2009
In distributed shipborne high frequency (HF) surface wave over-the-horizon radar (DS-OTHR) system, the movement of radar can make the system more complex. In this paper, we analyze the geometrical change of the distributed shipborne system with the T-Rn mechanism and its effect to the echoes of target and sea.
null Yuan Yeshu, null Ye Lichao
openaire   +1 more source

Signal processing of sky wave OTH-B radar

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing, 2002
The design technique of signal processing of sky wave OTH-B radar is presented as well as 3D treatments in space, time and frequency domains and their performances. The technical insurance of a bistatic synchronization system and the characteristic of signal processing when detecting ship targets are reported briefly. The performances of a subarray are
null Zhou Wenyu, null Jiao Peinan
openaire   +1 more source

Ship target detection for HF groundwave shipborne OTH radar

IEE Proceedings - Radar, Sonar and Navigation, 1999
The 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
openaire   +1 more source

Radar Transcriptions from AN/FPS-95 to Madre OTH Radar

1974
Abstract : Magnetic tape recording of the AN/FPS-95 OTH radar receiver output have been converted on a general purpose computer to a form suitable for playback on the MADRE radar signal processor. These playbacks demonstrate the excellent detection capability of the AN/FPS-95 when used in conjunction with the MADRE processor and displays.
Charles M. Howe, Frank E. Boyd
openaire   +1 more source

Propagation mode estimation: a prerequisite for OTH radar fusion

Proceedings of 1994 IEEE International Conference on MFI '94. Multisensor Fusion and Integration for Intelligent Systems, 2002
Over-the-horizon (OTH) radars operate in the high frequency (HF) band of the radar spectrum and utilize ionospheric reflections to detect and track targets in regions up to 2000 nautical miles from the radar site. OTH radars thus have the capability to serve as cost-effective sensors for detecting and tracking aircraft over large surveillance areas. In
T. Kurien, P. Milanfar, D. Logan, W.P. Berry   +3 more
openaire   +1 more source

Fetch limited sea scattering spectral model for HF-OTH skywave radar

2010 IEEE International Geoscience and Remote Sensing Symposium, 2010
Sea Normalized RCS, and Doppler spectra have been revised for HF-OTH Clutter Modelling. The Hasselmann model is firstly introduced to predict the sea directional spectrum of fetch-limited sea and results have been compared with the Pierson-Moskovitz model used for large scale ocean remote sensing.
Paladini R, DALLE MESE, ENZO, BERIZZI, FABRIZIO, Garzelli A, MARTORELLA, MARCO, Capria A.   +5 more
openaire   +3 more sources