Range doppler imaging for LFMCW ISAR based on azimuth interpolation

Author

Su Fulin ; Su Yuan ; Gao Jianjun

Author_Institution

Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China

Volume

3

fYear

2012

fDate

21-25 Oct. 2012

Firstpage

2048

Lastpage

2052

Abstract

ISAR is a kind of radar for obtaining two dimensional high resolution image of moving target. In the past, ISAR techniques with LFM pulsed signal has been studied deeply. Now, because of the requirement of low-cost, low weight and low powered, LFMCW signal is used in ISAR. This paper has investigated the imaging method of LFMCW ISAR. The problem of ISAR image formation using LFMCW ISAR has been studied in detail. Analyzing indicates that the echoes exist two dimensional coupling. Using the traditional RDA used in LFM pulsed ISAR for these data from LFMCW ISAR will produce position distortion. In order to correct this distortion, a new imaging method-azimuth interpolation RDA is presented. Simulation shows that the presented method is very effective.

Keywords

Doppler radar; image resolution; interpolation; radar imaging; synthetic aperture radar; 2D coupling; 2D high resolution image; ISAR image formation; LFMCW ISAR; LFMCW signal; azimuth interpolation RDA; imaging method; moving target; pulsed signal; radar; range doppler imaging; Imaging Algorithm; Inverse synthetic aperture radar (ISAR); LFMCW; Range Doppler Algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing (ICSP), 2012 IEEE 11th International Conference on

Conference_Location

Beijing

ISSN

2164-5221

Print_ISBN

978-1-4673-2196-9

Type

conf

DOI

10.1109/ICoSP.2012.6491984

Filename

6491984