ISAR非平稳目标成像时间和转速联合估计方法

doi:CNKI:11-1929/V.20101029.1748.000

Abstract

Abstract: In this paper, a method of joint estimation of imaging time and rotation velocity is proposed for inverse synthetic aperture radar (ISAR) maneuvering targets, and the closed expression form of rotation velocity with phase slope difference (PSD) is derived in detail. First, the target rotation phase is retrieved based on two prominent scatterers, and the suitable imaging times are selected as the intervals with high phase linearity degree (PLD). Second, the rotation phase during the suitable imaging time is divided into two half segments, and the PSD between the two half segments is estimated by their difference. Accordingly, the rotation velocity can be obtained based on the PSD, and the range-Doppler(RD) image cross range scaling can be realized by using the estimated rotation velocity. Finally, the effectiveness of the proposed method is verified by using simulated as well as real data.

Key words: inverse synthetic aperture radar, maneuvering target, imaging time, rotation velocity, cross range scaling

CLC Number:

V243.2
TN958

PENG Shibao, XU Jia, XIA Bin, LENG Yi, XIANG Jiabin. Joint Estimation of Suitable Imaging Time and Rotation Velocity for ISAR Maneuvering Target[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011, 32(4): 702-709.

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Joint Estimation of Suitable Imaging Time and Rotation Velocity for ISAR Maneuvering Target

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