Results 121 to 130 of about 618,348 (165)

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
Wenyu Zhou, Peinan Jiao
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Traveling Ionospheric Disturbance Mitigation for OTH Radar

2007 IEEE Radar Conference, 2007
Deflection of HF propagation paths by traveling ionospheric disturbances (TIDs) remains a troubling cause of coordinate registration errors for over-the-horizon (OTH) radar. Bandwidth and coverage limitations in ionospheric soundings preclude the ability to model TID structure in real time in most cases.
L. J. Nickisch, Mark A. Hausman, Sergey Fridman   +2 more
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Application of superresolution techniques to the ground OTH radar

Proceedings of National Aerospace and Electronics Conference (NAECON'94), 2002
The conventional angular superresolution techniques tend to be based on the assumption of independent noise samples between array elements. In this paper, however, the unindependent real sea clutter and atmospheric noise samples are considered and supposed to be prevailing for a practical HF ground wave OTH radar system, to which some superresolution ...
null Yang Hua, null Duan Fengzeng
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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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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
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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
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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
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Knowledge-Based Adaptive Processing for Ship Detection in OTH Radar

2006 International Radar Symposium, 2006
This 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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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
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