Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT

Penghui Huang; Xiang Gen Xia; Yesheng Gao; Xingzhao Liu; Guisheng Liao; Xue Jiang

doi:10.1109/TGRS.2019.2899728

Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT

Penghui Huang^*, Xiang Gen Xia, Yesheng Gao, Xingzhao Liu, Guisheng Liao, Xue Jiang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

52 Citations (Scopus)

Abstract

In this paper, a new algorithm is presented to image ground moving targets in a synthetic aperture radar (SAR) system based on range frequency reversal transform-fractional Fourier transform (RFRT-FrFT). In this algorithm, a range compressed signal is initially transformed into the range frequency domain and then RFRT is proposed to directly compensate the range migration via multiplying the signal in the range frequency domain by its reversed data according to the equal interval sampling of range frequency variable, which can significantly decrease the computational complexity in target envelope migration elimination. Then, FrFT is applied to accomplish the target motion parameter estimation after range migration alignment. Finally, a ground moving target is well focused after motion compensation. The effectiveness of the proposed algorithm is validated by both simulated and real SAR data.

Original language	English
Article number	8681723
Pages (from-to)	5476-5492
Number of pages	17
Journal	IEEE Transactions on Geoscience and Remote Sensing
Volume	57
Issue number	8
DOIs	https://doi.org/10.1109/TGRS.2019.2899728
Publication status	Published - Aug 2019
Externally published	Yes

Keywords

Doppler ambiguity
fractional Fourier transform (FrFT)
motion parameter estimation
range frequency reversal transform (RFRT)
synthetic aperture radar (SAR)

Access to Document

10.1109/TGRS.2019.2899728

Cite this

@article{ecbe146af8f3401cba0f9a0b90db7313,

title = "Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT",

abstract = "In this paper, a new algorithm is presented to image ground moving targets in a synthetic aperture radar (SAR) system based on range frequency reversal transform-fractional Fourier transform (RFRT-FrFT). In this algorithm, a range compressed signal is initially transformed into the range frequency domain and then RFRT is proposed to directly compensate the range migration via multiplying the signal in the range frequency domain by its reversed data according to the equal interval sampling of range frequency variable, which can significantly decrease the computational complexity in target envelope migration elimination. Then, FrFT is applied to accomplish the target motion parameter estimation after range migration alignment. Finally, a ground moving target is well focused after motion compensation. The effectiveness of the proposed algorithm is validated by both simulated and real SAR data.",

keywords = "Doppler ambiguity, fractional Fourier transform (FrFT), motion parameter estimation, range frequency reversal transform (RFRT), synthetic aperture radar (SAR)",

author = "Penghui Huang and Xia, {Xiang Gen} and Yesheng Gao and Xingzhao Liu and Guisheng Liao and Xue Jiang",

note = "Publisher Copyright: {\textcopyright} 1980-2012 IEEE.",

year = "2019",

month = aug,

doi = "10.1109/TGRS.2019.2899728",

language = "English",

volume = "57",

pages = "5476--5492",

journal = "IEEE Transactions on Geoscience and Remote Sensing",

issn = "0196-2892",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "8",

}

TY - JOUR

T1 - Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT

AU - Huang, Penghui

AU - Xia, Xiang Gen

AU - Gao, Yesheng

AU - Liu, Xingzhao

AU - Liao, Guisheng

AU - Jiang, Xue

PY - 2019/8

Y1 - 2019/8

N2 - In this paper, a new algorithm is presented to image ground moving targets in a synthetic aperture radar (SAR) system based on range frequency reversal transform-fractional Fourier transform (RFRT-FrFT). In this algorithm, a range compressed signal is initially transformed into the range frequency domain and then RFRT is proposed to directly compensate the range migration via multiplying the signal in the range frequency domain by its reversed data according to the equal interval sampling of range frequency variable, which can significantly decrease the computational complexity in target envelope migration elimination. Then, FrFT is applied to accomplish the target motion parameter estimation after range migration alignment. Finally, a ground moving target is well focused after motion compensation. The effectiveness of the proposed algorithm is validated by both simulated and real SAR data.

AB - In this paper, a new algorithm is presented to image ground moving targets in a synthetic aperture radar (SAR) system based on range frequency reversal transform-fractional Fourier transform (RFRT-FrFT). In this algorithm, a range compressed signal is initially transformed into the range frequency domain and then RFRT is proposed to directly compensate the range migration via multiplying the signal in the range frequency domain by its reversed data according to the equal interval sampling of range frequency variable, which can significantly decrease the computational complexity in target envelope migration elimination. Then, FrFT is applied to accomplish the target motion parameter estimation after range migration alignment. Finally, a ground moving target is well focused after motion compensation. The effectiveness of the proposed algorithm is validated by both simulated and real SAR data.

KW - Doppler ambiguity

KW - fractional Fourier transform (FrFT)

KW - motion parameter estimation

KW - range frequency reversal transform (RFRT)

KW - synthetic aperture radar (SAR)

UR - http://www.scopus.com/inward/record.url?scp=85069796027&partnerID=8YFLogxK

U2 - 10.1109/TGRS.2019.2899728

DO - 10.1109/TGRS.2019.2899728

M3 - Article

AN - SCOPUS:85069796027

SN - 0196-2892

VL - 57

SP - 5476

EP - 5492

JO - IEEE Transactions on Geoscience and Remote Sensing

JF - IEEE Transactions on Geoscience and Remote Sensing

IS - 8

M1 - 8681723

ER -

Ground Moving Target Refocusing in SAR Imagery Based on RFRT-FrFT

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this