Open AccessMicro-motion Signature Extraction Method for Wideband Radar Based on Complex Image OMP Decomposition
Author(s) -
Ying Luo,
Qun Zhang,
Guozheng Wang,
Guan Hua,
You-qing Bai
Publication year - 2012
Publication title -
leida xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.301
H-Index - 13
ISSN - 2095-283X
DOI - 10.3724/sp.j.1300.2012.20065
Subject(s) - signature (topology) , artificial intelligence , radar , computer science , pattern recognition (psychology) , radar imaging , computer vision , geology , remote sensing , mathematics , telecommunications , geometry
In order to extract the micro-motion signatures in condition of Migration Through Range Cells (MTRC) of micro-motional scatterers and azimuthal undersampling in wideband radar, a method based on the Orthogonal Matching Pursuit (OMP) decomposition of the complex image is proposed. By making use of the amplitude and phase information of “range-slow-time image”, a set of micro-Doppler signal atoms is constructed in the complex image space. The OMP algorithm in vector space is then extend to the complex image space to obtain the micro-motion parameters. Simulations demonstrate the proposed method can extract the micro-motion signatures when MTRC of micro-motional scatterers is occurred, and can also work well when the sampling rate is lower than the Nyquist sampling rate