Ground moving target imaging algorithm for single channel airborne CSSAR

Li, Yongkang; Wang, Tong

doi:10.1049/el.2014.2460

Cited by 5 publications

(9 citation statements)

References 3 publications

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“…For CSSAR, the study on ground moving target imaging is scarce. In [6], a ground moving target imaging algorithm is proposed for the airborne CSSAR-GMTI system with medium-to-low resolution. The main advantage of this algorithm is that it can implement the range cell migration correction (RCMC) efficiently.…”

Section: Cssar Canmentioning

confidence: 99%

“…Substituting ( 5) into (6) and noting that r a r c ω 4 24R c + r 2 a r 2 c ω 4 8R 3 c > 0, the analytical expression of simple form for the phase error is obtained below…”

Section: B Accuracy Analysis Of the Quadratic-approximated Range Equationmentioning

confidence: 99%

“…where l 20 = r a r ref ω 2 (2R ref ) is the quadratic-term coefficient of the range equation of the static target located in the scene center, r ref and R ref are the distances from the scene center to the coordinate origin and the radar, respectively. 1 In [6], a first-order power series expanding is adopted because a medium range resolution is considered. However, when the range resolution is high, the second-order term should be kept.…”

Section: A Secondary Range Compressionmentioning

confidence: 99%

“…The second-to-last exponential term of ( 15) is due to the RCM of the target, and thus the RCMC can be performed by compensating for this term. Based on this finding, in [6], the RCMC is performed via a phase multiplication in the 2-D frequency with the following reference function…”

Section: B Range Cell Migration Correctionmentioning

confidence: 99%

“…Circular stripmap SAR (CSSAR) is a type of SAR that travels along a circular path, and its antenna points outward the circular path with a pointing angle orthogonal to the velocity vector of the radar [6]- [9], as shown in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

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An Accurate Imaging and Doppler Chirp Rate Estimation Algorithm for Airborne CSSAR-GMTI Systems

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Wang

et al. 2019

IEEE Access

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Airborne circular stripmap synthetic aperture radar (CSSAR)-ground moving target indication (GMTI) systems are attractive tools for air-to-ground surveillance and monitoring, because of their advantages of short revisit time and large coverage. This paper proposes an accurate imaging and Doppler chirp rate estimation algorithm for the airborne CSSAR-GMTI system with high range resolution. A key step of this algorithm is to utilize an alternation strategy to implement the correction of the target's range cell migration and the estimation of the range equation's quadratic coefficient alternatively. This step enables the proposed algorithm to achieve an accurate imaging and Doppler chirp rate estimation of a ground moving target. In addition, this paper presents an investigation on the accuracy of the quadratic-approximated range equation for ground moving target imaging. Numerical experiments are conducted to validate the proposed algorithm. INDEX TERMSSynthetic aperture radar, ground moving target indication, ground moving target imaging, Doppler chirp rate estimation. YONGKANG LI (M'19) was born in Hunan, China, in 1988. He received the B.Eng. degree in electronic information engineering and the Ph.D. degree in signal and information processing from

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Section: Cssar Canmentioning

confidence: 99%

“…Substituting ( 5) into (6) and noting that r a r c ω 4 24R c + r 2 a r 2 c ω 4 8R 3 c > 0, the analytical expression of simple form for the phase error is obtained below…”

Section: B Accuracy Analysis Of the Quadratic-approximated Range Equationmentioning

confidence: 99%