Results 101 to 110 of about 232 (143)

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

Narrow-band interference suppression technology of OTH radar

2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002., 2003
In over-the-horizon (OTH) radar, the frequency band is limited by crowded and powerful interference. It is difficult to find an uncontaminated and broad band, which leads to low range resolution and signal-to-interference and noise ratio (SINR). A desired method is the suppression of interference in a definite bandwidth.
null Yang Zhi-qun, null Ni Jin-lin, null Liu Guo-sui   +2 more
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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

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
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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   +1 more source

On the feasibility of microwave produced Bragg reflector for the OTH radar application

1990 Plasma Science IEEE Conference Record - Abstracts, 1990
Summary form only, given. A series of chamber experiments was conducted to investigate three major issues concerning the feasibility of using microwave-produced atmospheric plasma layers as a supplemental reflector for the OTH radar. These include (1) the effectiveness of the plasma layers as a Bragg reflector, (2) the propagation of high-power ...
S.P. Kuo, Y.S. Zhang
openaire   +1 more source

Cost Analysis of an OTH Radar System

1974
Abstract : Ship-detecting (SD) land-based over-the-horizon radars are classed into two groups according to the power rating and complexity of their transmitting arrays. Type I SD systems are relatively lower powered, have little directivity in the vertical plane, and have minimal elevation-angle steering capability, whereas Type II systems are high ...
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Detection of ships using OTH radar with short integration times

Proceedings of the 1997 IEEE National Radar Conference, 2002
Localizing and tracking ocean-going ships using high-frequency over-the-horizon radar (OTHR) currently requires long coherent integration times (CITs) and places critical demands on scarce radar resources. Here, modern spectral analysis techniques (MSATs) are employed to localize ships from clutter and noise in Doppler space using shorter CITs than are
J.A. Olkin, W.C. Nowlin, J.R. Barnum
openaire   +1 more source

Study of azimuth reconstruction for distributed surface wave OTH radar

Proceedings of 2012 5th Global Symposium on Millimeter-Waves, 2012
This article mainly studied in azimuth information reconstruction of distributed surface wave Over-The-Horizon radar. We deduce a new azimuth information reconstruction approach about distributed surface wave Over-The-Horizon radar through the basis of the signal model construction, which is based on the analyzing direction of echo signal and system ...
Yansong Zhang, Yeshu Yuan
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Consideration of reciprocal mixing in HF OTH radar design

7th International Conference on High Frequency Radio Systems and Techniques, 1997
The 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 ...
openaire   +1 more source