Results 101 to 110 of about 3,029 (137)
Some of the next articles are maybe not open access.
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
openaire +3 more sources
OTH radar phenomenology: signal interpretation and target characterization at HF
IEEE Aerospace and Electronic Systems Magazine, 2017Implicitly 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
openaire +3 more sources
Key Challenges in True Multistatic OTH Radar Concepts based on HF-Radar in iFURTHER
2024 International Radar Conference (RADAR)Dominik Bok +12 more
openaire +3 more sources
Orthogonal waveform support in MIMO HF OTH radars
2007 International Waveform Diversity and Design Conference, 2007HF 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 +2 more
openaire +2 more sources
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
openaire +1 more source
Fetch limited sea scattering spectral model for HF-OTH skywave radar
2010 IEEE International Geoscience and Remote Sensing Symposium, 2010Sea 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 +5 more
openaire +3 more sources
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
openaire +2 more sources
Range sidelobes suppression for wideband randomly discontinuous spectra OTH-HF radar signal
Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509), 2004Over-the-horizon (OTH) HF radars work in a heavily congested HF band. It is quite difficult to find broad clear frequency bands for system requirements. The randomly discontinuous spectra (RDS) signal is employed to combat spectrum congestion since it can evade the external interferences in the frequency domain.
null Dongpo Zhang, null Xingzhao Liu
openaire +1 more source
Detection, classification and correction of ionospheric distortion in HF skywave (OTH) radar systems
Proceedings of International Radar Conference, 2002HF skywave radar performance is often severely degraded by nonstationarity of the ionospheric propagation channel, so recognition and correction of distortion and contamination is a vital part of the radar signal processing sequence. As a consequence of the variety of physical mechanisms responsible for such degradation, a corresponding number of model-
S.J. Anderson, Y.I. Abramovich
openaire +1 more source
Time-frequency analysis based image processing for maneuvering target detection in HF OTH radar
IET Conference Publications, 2009In this paper an algorithm for maneuvering target detection in HF over-the-horizon radar is presented, which is based on the interpretation of the time-frequency map as an image. In the algorithm, radar signal is processed in joint time-frequency domain with short-time Fourier transform.
null Lei Zhiyong, null Huang Yinhe
openaire +1 more source