Results 111 to 120 of about 3,029 (137)

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 ...
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Maneuvering target signal processing algorithm based on improved S-method for HF OTH radar

IET Conference Publications, 2009
Core steps of S-method based maneuvering target signal processing for HF (high frequency) OTH(over-the-horizon) radar include the calculation of S-method distribution from signal's STFT (short time Fourier transform) and S-method distribution based signal decomposition.
null Wei Yinsheng, null Yu Yang, null Xu Nuo, null Bian Wei   +3 more
openaire   +1 more source

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   +1 more source

Issues with Orthogonal Waveform Use in MIMO HF OTH Radars

2011
Current operational HF over-the-horizon (OTH) radars are now accepted as effective and comparatively low-cost wide-area surveillance sensors. They are routinely used to provide air and surface situational awareness over vast regions of land and sea. The technology in, and performance of, these current generation radars is impressive, however, there are
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A technique for calculating ionospheric Doppler shifts from standard ionograms suitable for scientific, HF communication, and OTH radar applications

Radio Science, 2009
High‐resolution Doppler ionograms taken at 5 min intervals were obtained from a KEL IPS 71 ionosonde operating over a full ionosonde sweep range. The ionograms were converted into true height profiles using the program POLAN. POLAN also produced an equivalent parabolic layer model of best fit to the true height profile.
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A Simulation Framework for HF-OTH Skywave Radars: the Received Signal Model

2007
This paper is focused on the analysis and the simulation of a model for the received signal of a HF-OTH skywave radar. More precisely, this work aims to identify and model the main components of a HF-OTH skywave radar received signal, in order to provide a realistic simulated input that can be used as test-bed for the signal processing algorithms ...
Soleti, Rocco, CAPRIA, AMERIGO, BERIZZI, FABRIZIO, DALLE MESE, ENZO, Gulino, Irene   +4 more
openaire   +1 more source

Spectrum-Controlled Waveforms Design with the Thumb- Tack Ambiguity Function for HF OTH Radars

2023 IEEE Radar Conference (RadarConf23), 2023
Yuri Abramovich, Dan Dickey, Victor Abramovich   +2 more
openaire   +1 more source

Target Echo Characteristics Analysis of HF Groudwave Shipborne OTH Bistatic Radar

Journal of Electronics & Information Technology, 2011
Zhen-xing Lu, Bin Xu, Ye-shu Yuan
openaire   +1 more source

Multi-channel track-before-detect approach for airborne target with OTH radar

2023
Xiaoying Lu
exaly  

Broadband multispectral compatible absorbers for radar, infrared and visible stealth application

Progress in Materials Science, 2023
Ting Yu, Shujuan, Ming Zhou
exaly