GNSS-based BiSAR imaging using modified range migration algorithm

Tao Zeng; Fei Feng Liu; Michail Antoniou; Mikhail Cherniakov

doi:10.1007/s11432-015-5366-y

GNSS-based BiSAR imaging using modified range migration algorithm

Tao Zeng, Fei Feng Liu^*, Michail Antoniou, Mikhail Cherniakov

^*Corresponding author for this work

School of Information and Electronics

University of Birmingham

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

7 Citations (Scopus)

Abstract

This paper proposed a new focusing approach for the bistatic SAR systems with a GNSS (Global Navigation Satellite System) satellite as the transmitter. Because of the long integration time the inherited curvature of the transmitter’s trajectory was adopted and the spatial variance of the equivalent velocity was derived under the principal of equivalent slant range model in the system signal model. The proposed focusing approach consists of two-step processing. Firstly, the general Doppler phase from constant velocity of the echo data is focused by modified Stolt mapping. Secondly, the residual nonlinear Doppler phase due to velocity variation is compensated by means of block-processing-based adaptive phase compensation to achieve large scene focusing. The simulation and experimental results validate the proposed algorithm in GNSS-based BiSAR systems.

Original language	English
Pages (from-to)	1-13
Number of pages	13
Journal	Science China Information Sciences
Volume	58
Issue number	8
DOIs	https://doi.org/10.1007/s11432-015-5366-y
Publication status	Published - 25 Aug 2015

Keywords

GNSS-based BiSAR
curvature of trajectory
equivalent slant range model
modified Stolt mapping
two-step processing

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10.1007/s11432-015-5366-y

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title = "GNSS-based BiSAR imaging using modified range migration algorithm",

abstract = "This paper proposed a new focusing approach for the bistatic SAR systems with a GNSS (Global Navigation Satellite System) satellite as the transmitter. Because of the long integration time the inherited curvature of the transmitter{\textquoteright}s trajectory was adopted and the spatial variance of the equivalent velocity was derived under the principal of equivalent slant range model in the system signal model. The proposed focusing approach consists of two-step processing. Firstly, the general Doppler phase from constant velocity of the echo data is focused by modified Stolt mapping. Secondly, the residual nonlinear Doppler phase due to velocity variation is compensated by means of block-processing-based adaptive phase compensation to achieve large scene focusing. The simulation and experimental results validate the proposed algorithm in GNSS-based BiSAR systems.",

keywords = "GNSS-based BiSAR, curvature of trajectory, equivalent slant range model, modified Stolt mapping, two-step processing",

author = "Tao Zeng and Liu, {Fei Feng} and Michail Antoniou and Mikhail Cherniakov",

note = "Publisher Copyright: {\textcopyright} 2015, Science China Press and Springer-Verlag Berlin Heidelberg.",

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doi = "10.1007/s11432-015-5366-y",

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T1 - GNSS-based BiSAR imaging using modified range migration algorithm

AU - Zeng, Tao

AU - Liu, Fei Feng

AU - Antoniou, Michail

AU - Cherniakov, Mikhail

PY - 2015/8/25

Y1 - 2015/8/25

N2 - This paper proposed a new focusing approach for the bistatic SAR systems with a GNSS (Global Navigation Satellite System) satellite as the transmitter. Because of the long integration time the inherited curvature of the transmitter’s trajectory was adopted and the spatial variance of the equivalent velocity was derived under the principal of equivalent slant range model in the system signal model. The proposed focusing approach consists of two-step processing. Firstly, the general Doppler phase from constant velocity of the echo data is focused by modified Stolt mapping. Secondly, the residual nonlinear Doppler phase due to velocity variation is compensated by means of block-processing-based adaptive phase compensation to achieve large scene focusing. The simulation and experimental results validate the proposed algorithm in GNSS-based BiSAR systems.

AB - This paper proposed a new focusing approach for the bistatic SAR systems with a GNSS (Global Navigation Satellite System) satellite as the transmitter. Because of the long integration time the inherited curvature of the transmitter’s trajectory was adopted and the spatial variance of the equivalent velocity was derived under the principal of equivalent slant range model in the system signal model. The proposed focusing approach consists of two-step processing. Firstly, the general Doppler phase from constant velocity of the echo data is focused by modified Stolt mapping. Secondly, the residual nonlinear Doppler phase due to velocity variation is compensated by means of block-processing-based adaptive phase compensation to achieve large scene focusing. The simulation and experimental results validate the proposed algorithm in GNSS-based BiSAR systems.

KW - GNSS-based BiSAR

KW - curvature of trajectory

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GNSS-based BiSAR imaging using modified range migration algorithm

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