A unified back-projection correction algorithm for squint SAR based on SPECAN processing

Wang, Chao; Sun, Heng; Zhang, Xinyu; Zhang, Ran

doi:10.1109/icsidp47821.2019.9173368

Cited by 1 publication

(1 citation statement)

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“…To address the above problem, an echo preprocessing scheme is designed to accomplish de-aliasing operation of the 2-D spectrum without significantly increasing the PRF, so as to ensure high-precision imaging of the whole scene. This paper proposes the method of azimuth frequency domain dealiasing [30]- [33] using SPECAN. After preprocessing, the PRF of the signal will be greater than the Doppler bandwidth, which can eliminate spectrum aliasing.…”

Section: > Replace This Line With Your Manuscript Id Number (Double-c...mentioning

confidence: 99%

Frequency-Domain Imaging Algorithm for SA-BiSAR Based on Azimuth Dealiasing

Zhou,

Hu,

Jiao

et al. 2024

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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For the Doppler parameters coupling and spectral aliasing in the hybrid sliding spotlight mode of the spaceborneairborne bistatic SAR, a frequency domain imaging algorithm based on echo preprocessing is proposed in this paper. The article utilizes the idea of spectral analysis (SPECAN) technology to remove the spectrum aliasing by echo preprocessing, without subaperture partition and subaperture stitching operations, which reduces the computational burden. On this basis, the Legendre orthogonal polynomial expansion method is used to achieve a high accuracy approximation of the spaceborneairborne bistatic SAR (SA-BiSAR) slant range function. Combined with the method of series reversion (MSR), the accurate two-dimensional spectrum of the point target is derived, so that the high quality decoupling of the two-dimensional spectrum is achieved. Finally, the compensation functions are designed to complete the focusing imaging in the frequency domain. The simulation results of point targets and distributed targets show that the imaging algorithm proposed in this paper has good focusing performance and can improve the imaging quality of scene edge points.

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Section: > Replace This Line With Your Manuscript Id Number (Double-c...mentioning

confidence: 99%