基于时间反转和降阶Keystone的SAR-GMTI快速聚焦方法

doi:10.7527/S1000-6893.2018.21862

Abstract

Abstract: This paper describes the ground moving target focusing technique for the Synthetic Aperture Radar (SAR). For the problems existing in the present methods for ground moving target focusing, a fast SAR Ground Moving Target Indication (SAR-GMTI) focusing method based on time reversal and reduced-order Keystone processing is proposed. A three-order range model is established according to the characteristics of the maneuvering target. To eliminate the effects of Doppler spectrum split caused by doppler center blur, the proposed Time Reversal Processing (TRP) and reduced-order Keystone transform processing are combined to estimate the target second-order motion parameter. The second-order phase compensation function is constructed to compensate the second-order range migration and Doppler migration, and a focused result of a moving target is obtained. The proposed method has low computational complexity without any searching procedure. Simulations are provided to verify the validity of the proposed method.

Key words: synthetic aperture radar, ground moving target focusing, time reversal processing, Keystone transform, rang migration, Doppler migration

CLC Number:

V243.2
TN95

WAN Jun, ZHOU Yu, ZHANG Linrang, CHEN Zhanye. A fast SAR-GMTI focusing method based on time reversal and reduced-order Keystone[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(6): 321862-321862.

References

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A fast SAR-GMTI focusing method based on time reversal and reduced-order Keystone

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