Time-frequency imaging algorithm for highspeed spinning targets in two dimensions

Author

Li, Jie ; Qiu, C.-W. ; Zhang, Leiqi ; Xing, Mengdao ; Bao, Zhen ; Yeo, Tat-Soon

Author_Institution

Key Lab. for Radar Signal Process., Xidian Univ., Xi´an, China

Volume

4

Issue

6

fYear

2010

fDate

12/1/2010 12:00:00 AM

Firstpage

806

Lastpage

817

Abstract

This study focuses on the narrow-band radar imaging for high-speed spinning targets. Based on the time-frequency characteristic of the echoed signal, a novel coherent spectrogram redistribution method, coherent single range Doppler interferometry (CSRDI), is proposed, which is capable of generating high-resolution imagery by applying a phase matched processing. Furthermore, the approach performs well at low signal-to-noise ratio. The spinning rate error is also taken into consideration and an estimation approach based on the focal entropy is proposed. The validity is confirmed by real data and numerical simulations.

Keywords

image resolution; radar imaging; time-frequency analysis; coherent single range Doppler interferometry; coherent spectrogram redistribution method; echoed signal; estimation approach; focal entropy; high-resolution imagery; high-speed spinning targets; narrowband radar imaging; phase matched processing; signal-to-noise ratio; spinning rate error; time-frequency imaging algorithm;

fLanguage

English

Journal_Title

Radar, Sonar & Navigation, IET

Publisher

iet

ISSN

1751-8784

Type

jour

DOI

10.1049/iet-rsn.2009.0172

Filename

5569874