Results 21 to 30 of about 1,234 (185)
SUBSPACE IMPULSIVE INTERFERENCE SUPPRESSION IN OTHR [PDF]
Progress In Electromagnetics Research C, 2009 This paper proposes a novel subspace projection algorithm for impulsive interference (IMI) suppression in echo samples received by an over-the-horizon radar (OTHR). We particularly highlight the model that the frequency spectrum of IMI component is a complex cosine signal such that IMI cosine can be filtered out by subspace projection.
Tao Liu +3 more
openaire +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 12, Page 1743-1759, December 2023., 2023 An overview of the past and current clutter theoretical models and clutter suppression techniques in the HFSWR system is provided. The experimental results involved in the complex long‐term ionosphere observation are discussed. Special attention is paid to the correlation between the signal degradation sources and eliminating clutter techniques ...
Xiaowei Ji +3 more
wiley +1 more source
Joint integrated track splitting for multi-path multi-target tracking using OTHR detections
EURASIP Journal on Advances in Signal Processing, 2018 In target tracking applications where an over-the-horizon radar (OTHR) is used to gather measurements, one target may generate more than one measurement at each scan due to the multi-path propagation effect.
Yuan Huang, Taek Lyul Song, Joo Hyun Lee
doaj +1 more source
Seasonal Variation in Land and Sea Surface Backscatter Coefficients at High Frequencies
Remote Sensing, 2022 Over the horizon radars (OTHR) rely on the propagation of high frequency (HF) radio waves via the ionosphere to successfully achieve their designated missions.
Danielle Edwards, Manuel Cervera
doaj +1 more source
Testing RFoF Link for Transmitting HF-OTHR Signal Between Transmitter and Receiver Shelters
Telfor Journal, 2021 HF-OTHR site contains two equipment shelters, up to 1 km away from each other, that need to be connected for transmitting a FMCW signal. This connection, if realized using a coaxial cable, has shown itself to be vulnerable to external electromagnetic ...
P. Petrović +6 more
doaj +1 more source
Societal Applications of HF Skywave Radar
Remote Sensing, 2022 After exploratory research in the 1950s, HF skywave ‘over-the-horizon’ radars (OTHR) were developed as operating systems in the 1960s for defence missions, notably the long-range detection of ballistic missiles, aircraft, and ships.
Stuart Anderson
doaj +1 more source
High-Resolution Doppler and Azimuth Estimation and Target Detection in HFSWR: Experimental Study
Sensors, 2022 In this paper, we present a new high-resolution algorithm for primary signal processing in High Frequency Surface Wave Radar (HFSWR). The algorithm has been developed to achieve and improve primary signal processing performance in existing HFSWR radars ...
Dragan Golubović +2 more
doaj +1 more source
Introduction to Coastal HF Maritime Surveillance Radars
Polish Maritime Research, 2019 This paper presents the main technical characteristics and working performances of coastal maritime surveillance radars, such as low-power High-Frequency Surface Wave Radars (HFSWR) and Over the Horizon Radars (OTHR). These radars have demonstrated to be
Ilcev Dimov Stojce
doaj +1 more source
Report on the Development of the Cattle and Dairy Industries of India
Madras Agricultural Journal, 1937 The total output of milk in Lndia is exceptionally large.being between 700 and 800 million maunds 5,600 and 6,400 million gallons per year.Compared with othr countries India stands second in volume of milk production She produces over four times the ...
N.C.Wright
doaj +1 more source
Space Weather, 2023 Vertical total electron content (VTEC) has great importance in describing the ionosphere. VTEC values are commonly distributed in regular grids by means of so‐called global ionospheric maps (GIMs) and regional ionospheric maps (RIMs).
Gabriel O. Jerez +6 more
doaj +1 more source