一种高速机动平台SAR成像PRF改进设计方法

doi:10.12305/j.issn.1001-506X.2025.09.12

Abstract

Abstract:

When the high-speed maneuvering-platform synthetic aperture radar （SAR） is used for long-range imaging, there exists a problem that the pulse repetition frequency （PRF） is difficult to design, due to the large coverage range of the antenna’s pitch beam on the ground scene and the large Doppler bandwidth of the azimuth signal. To address this problem, combined with the requirements of engineering application, the range ambiguity and azimuth ambiguity constraints of the antenna beam coverage area are relaxed to the range echo and the azimuth Doppler spectrum of the SAR imaging area are unambiguous. Based on this, the improved design method of the PRF upper and lower limits is proposed. Simulation results show that the proposed method for high-speed manoeuvring SAR imaging with squint beam can effectively extend the range of PRF selection. The proposed imposed improved method can better meet the need of practical engineering applications.

Key words: high-speed maneuvering-platform, synthetic aperture radar （SAR）, pulse repetition frequency （PRF）, range ambiguity, azimuth ambiguity

CLC Number:

TN 957

Guohui ZHU, Lin YANG, Yang WANG, Taoye ZHENG. A modified PRF design method for high-speed maneuvering-platform SAR imaging[J]. Systems Engineering and Electronics, 2025, 47(9): 2905-2912.

Figures/Tables 11

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方法	PRF下限值	PRF上限值
文献[19]方法	16.04	9.15
文献[20]方法	32.16	6.61
文献[21]方法	6.68	6.57
本文方法	5.70	11.70

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A modified PRF design method for high-speed maneuvering-platform SAR imaging

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