Results 191 to 200 of about 1,405 (223)

EMDs-PHD algorithm for OTHR multi-target tracking

2016 IEEE International Conference on Information and Automation (ICIA), 2016
There exist the low data rate, low detection probability, low measurement precision problem and multi-path effects of ionosphere in the Over the Horizon Radar (OTHR) multi-target tracking. The exponential mixture density probability hypothesis density filter (EMDs-PHDF) based on random finite set (RFS) is proposed.
Feng Yang, Hao Chen, Pengyan Zhang, Keli Liu   +3 more
openaire   +1 more source

A New Maneuvering Target Detection Algorithm in OTHR

Applied Mechanics and Materials, 2014
In the three-order polynomial phase signal, HAF can be used to reduce phase order to achieve the phase parameter estimation. The loss of signal to noise ratio in the order reduction processing is serious. In order to reduce the SNR loss, this paper uses CPF to reduce phase order.
Hui Yong Li, Wan Ge Li, Jin Feng Hu, Hui Ai, Zhi Rong Lin   +4 more
openaire   +1 more source

HF OTHR target detection and estimation subsystem

IEEE Aerospace and Electronic Systems Magazine, 1999
This paper describes the principle of the target detection and estimation with a high frequency ground wave over-the-horizon radar, introduces the structure and the implementation of the detection and estimation subsystem that can process signals in parallel. The accomplished experimental results demonstrate that this system can successfully detect and
null Wang Wei, null Peng Yingning, null Quan Taifan, null Liu Yongtan   +3 more
openaire   +1 more source

Research on Aircraft Target Detection Probability for OTHR

Applied Mechanics and Materials, 2014
In this paper, a simulation method of detection probability of aircraft target for Over-The-Horizon Radar (OTHR) by computer is proposed. The effects of different ionosphere states on detection range for OTHR is concluded, which become constraint on simulation of detection probability.
Jing Jia, Wen Sheng, Lu Zhang
openaire   +1 more source

Radio Frequency Interference Suppression Algorithm Based on SOCP in OTHR

Circuits, Systems, and Signal Processing, 2016
Sky wave over-the-horizon radar is easily affected by radio frequency interference (RFI) since it shares the high-frequency band with many radio services. Among the existing methods, spatial filtering method is ineffective to suppress the mainlobe RFI, and time-frequency method usually weakens the target signal while rejecting RFI.
Jinfeng Hu, Hanwen Chen, Zhirong Lin, Huiyong Li 0001, Julan Xie   +4 more
openaire   +1 more source

Sky-wave OTHR ionospheric channel simulation

IET International Radar Conference 2013, 2013
A new simulation method for sky-wave OHTR ionospheric channels is developed. To make the simulation more robust, the International Geomagnetic Reference Field (IGRF) model and International Reference Ionosphere (IRI) model are integrated with a classical 3D ray tracing code firstly.
null Xue Yong-Hua, null Chai Yong, null Guan Jian, null Bao Zhong-Hua   +3 more
openaire   +1 more source

Transient Interference Excision in China Experimental OTHR

Revue de l'Electricité et de l'Electronique, 2005
Le radar transhorizon a onde de ciel recherche les cibles apres reflexion sur l'ionosphere. Il est dote d'une grande portee et couvre une large zone, mais il recoit de forts echos du terrain et de la mer, et il est soumis a de fortes interferences : interferences radiofrequences, bruit industriel, bruit impulsif, echos sur les trainees meteoriques, etc.
openaire   +1 more source

OTHR multipath tracking with uncertain coordinate registration

IEEE Transactions on Aerospace and Electronic Systems, 2004
Multipath probabilistic data association (MPDA) exploits discrete multipath propagation to improve tracking performance for systems such as over-the-horizon radar (OTHR). The original formulation assumed a known ionospheric environment for mapping radar measurements to ground coordinates.
openaire   +1 more source

Piecewise adaptive beamforming method with multiple constraints for OTHR

IET International Radar Conference 2013, 2013
The coherent processing interval in Over-The-Horizon Radar (OTHR) is usually set long to strengthen the weak signals, which increases the nonstationarity of the inference and make it more difficult to be restrained. In this paper, a piecewise beamforming method using multiple constraints to hold the coherence of the clutter is proposed.
null Zheng Bao, null Jian-wen Chen
openaire   +1 more source

Multipath Separation for HF OTHR Waveform Recovery

2022 IEEE Radar Conference (RadarConf22), 2022
Yuri Abramovich, Victor Abramovich
openaire   +1 more source