OFDM signal design for range ambiguity suppression in SAR configuration

Riche, Vishal; Méric, Stéphane; Pottier, Éric; Baudais, Jean-Yves

doi:10.1109/igarss.2012.6351076

Cited by 12 publications

(17 citation statements)

References 6 publications

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“…a process capable of extracting the ambiguous response of the point target, which is visible in the nonambiguous radar image, as described in [12].…”

Section: A Range Ambiguitymentioning

confidence: 99%

Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration

Riche¹,

Méric²,

Baudais³

et al. 2014

IEEE Trans. Geosci. Remote Sensing

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International audienceThis paper presents an opportunity to cancel range ambiguities in synthetic aperture radar (SAR) configuration. One of the limitations of SAR systems is the range ambiguity phenomenon that appears with long delayed echoes. The reflected signal corresponding to one pulse is detected when the radar has already transmitted the next pulse. Thus, this signal is considered as an echo from the next pulse. This paper investigates the opportunity of coding the transmitted pulses using an orthogonal frequency-division multiplexing pulse. The results show that coded-OFDM signals outperform conventional chirp signal and make it possible to relax constraints placed upon the pulse repetition frequency

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“…a process capable of extracting the ambiguous response of the point target, which is visible in the nonambiguous radar image, as described in [12].…”

Section: A Range Ambiguitymentioning

confidence: 99%

Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration

Riche¹,

Méric²,

Baudais³

et al. 2014

IEEE Trans. Geosci. Remote Sensing

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“…However, to keep the orthogonality property, if a subchannel is active in one signal, it should be inactive in the other one. It has been proposed to set a 1 ¼ a NÀ1 ¼ 1 and a 2 ¼ a N ¼ 0 in one OFDM signal and b 2 ¼ b N ¼ 1 and b 1 ¼ b NÀ1 ¼ 0 in the other one [20]. The range resolution given in Eq.…”

Section: Signal Requirementsmentioning

confidence: 99%

Waveform Design for MIMO Radar and SAR Application

Méric¹,

Baudais²

2018

Topics in Radar Signal Processing

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Remote sensing applications using radar systems require specific signal processing to obtain high resolution for radar imagery. This high resolution is essential in detection and imaging processing and is provided by using synthetic aperture radar (SAR) processing. This chapter describes the application of the multiple-input multiple-output (MIMO) configuration and the orthogonal frequency-division multiplexing (OFDM) concept to overcome some existing limitations with conventional imaging systems as well as to assess the improvements achieved.

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“…After that matched filter of the estimated phase history is used to construct the cross-range profile. The use of OFDM signal for the suppression of the Range ambiguity was used by Riche et al in [12]- [14]. Furthermore, the adoption of CP-OFDM for SAR application has been introduced by Zhang et al [15] in order to eliminate the interference between targets lies in different range cells.…”

Section: Introductionmentioning

confidence: 99%

OFDM synthetic aperture radar based on fractional fourier transform

Khadher

Zidouri

2016

2016 13th International Multi-Conference on Systems, Signals &Amp; Devices (SSD)

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This paper investigates the use of fractional Fourier transform (FrFT)-based Orthogonal Frequency Division Multiplexing for Synthetic Aperture Radar (SAR) imaging for single point target and extended target. The geometry of synthetic aperture radar using FrFT-based OFDM is presented with the developing algorithm to process the raw data to reconstruct the image of the target in the range and in the Azimuth direction. In the simulation results, single point target is assumed to be at the center of swath width to show the performance of this approach as well as the point spread function in the range and Azimuth direction. Extended target with the shape of tank is used to show the capability of this method in resolving extended target images.

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OFDM signal design for range ambiguity suppression in SAR configuration

Abstract: International audienc

Cited by 12 publications

References 6 publications

Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration

Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration

Waveform Design for MIMO Radar and SAR Application

OFDM synthetic aperture radar based on fractional fourier transform

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