Open AccessIonosphere phase decontamination method based on subspace in sky‐wave OTHR
Author(s) -
Bo Chao,
Gu Hong,
Su Weimin,
Chen Jinli
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.2994
Subject(s) - skywave , over the horizon radar , ionosphere , clutter , radar , phase (matter) , sky , subspace topology , computer science , algorithm , remote sensing , optics , geology , physics , geophysics , telecommunications , meteorology , artificial intelligence , quantum mechanics
In general, ionosphere phase contamination can expand the Bragg peak of sea clutter and the echo signal from a target in sky‐wave over‐the‐horizon radar (OTHR). By exploiting the subspace algorithm, an effective approach of ionosphere phase decontamination is proposed to solve the above‐mentioned problems. In this new scheme, the stronger one of two spreading Bragg peaks is extracted by an adaptive sliding‐window bandpass filter, and the instantaneous phase of the spreading Bragg peak is obtained by the subspace algorithm. Both the theoretical analysis and the experimental results of the real OTHR data have confirmed the feasibility of this new method.