Optimization of OFDM SAR signals for range ambiguity suppression

Author

Riche, Vishal ; Meric, Stephane ; Baudais, J. ; Pottier, Eric

Author_Institution

IETR, Univ. of Rennes, Rennes, France

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

278

Lastpage

281

Abstract

A limitation for synthetic aperture radar (SAR) systems is the range ambiguity phenomena that appears with long delayed echoes. With ambiguous echoes, the reflected signal corresponding to one pulse is detected when the radar has already transmitted the next pulse. By using orthogonal pulses, it is possible to increase the range ambiguity. This paper investigates the optimization of the coded orthogonal frequency division multiplexing (OFDM) signal to achieve range ambiguity suppression. This paper presents our study on the use of the genetic algorithm to optimize the OFDM signal. The results show that OFDM signals outperform conventional radar chirps.

Keywords

OFDM modulation; echo suppression; genetic algorithms; optimisation; radar detection; radar signal processing; synthetic aperture radar; OFDM SAR signal optimization; ambiguous echoes; coded orthogonal frequency division multiplexing; genetic algorithm; long delayed echoes; orthogonal pulses; pulse detection; radar chirps; range ambiguity suppression; reflected signal; synthetic aperture radar system; Chirp; Genetic algorithms; OFDM; Optimization; Radar imaging; Synthetic aperture radar;

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference (EuRAD), 2012 9th European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2471-7

Type

conf

Filename

6450733