OFDM signal design for range ambiguity suppression in SAR configuration

Author

Riché, Vishal ; Méric, Stéphane ; Pottier, Eric ; Baudais, Jean-Yves

Author_Institution

SAPHIR team, IETR, Rennes, France

fYear

2012

fDate

22-27 July 2012

Firstpage

2156

Lastpage

2159

Abstract

Remote sensing applications need specific signal processing to obtain high resolution for radar images. One of limitations for synthetic aperture radar (SAR) systems is the range ambiguity phenomenon that appears with long delayed echoes. The reflected signal corresponding to the pulse (n) is detected when the radar has already transmitted the next pulse (n + 1). Thus, this signal is considered as an echo from the pulse (n + 1). This paper investigates the opportunity of coding the transmitted pulse using an orthogonal frequency division multiplexing (OFDM) pulse. The results show that coded OFDM signal outperform conventional chirp signal.

Keywords

OFDM modulation; image resolution; radar imaging; radar signal processing; remote sensing by radar; synthetic aperture radar; OFDM signal design; OFDM signal outperform conventional chirp signal; SAR configuration; orthogonal frequency division multiplexing pulse; radar image resolution; range ambiguity suppression; remote sensing application; specific signal processing; synthetic aperture radar system; Azimuth; Chirp; OFDM; Radar imaging; Signal resolution; Synthetic aperture radar; OFDM; Range ambiguity; SAR;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International

Conference_Location

Munich

ISSN

2153-6996

Print_ISBN

978-1-4673-1160-1

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2012.6351076

Filename

6351076