一种新的步进频MIMO-SAR带宽合成的处理方法

doi:10.3969/j.issn.1001-2400.2018.02.025

Abstract

Abstract:

For stepped frequency multiple-input and multiple-output synthetic aperture radar (SF-MIMO-SAR), the result of bandwidth synthesis in range is affected by channel phase mismatch. In order to solve this problem, this paper proposes a two-step error estimation method based on echo data. First, aiming to optimize the focus sub-band image, phase adjustment by contrast enhancement algorithm is modified to estimate high-order phase errors in range. Then, the sub-band signal is up-sampled, shifted, and the model of balanced side-lobe is proposed to calculate and compensate the constant phase error. After the above compensation, we will obtain the synthesized SAR image with the resolution of 0.06 meter in range, and experimental data demonstrate the effectiveness of the proposed method.

Key words: bandwidth synthesis, stepped frequency, side-lobe balanced model, side-lobe deviation rate

JING Guobin;SUN Guangcai;XING Mengdao;GUO Rui;BAO Zheng. Novel two-step method of bandwidth synthesis for SF-MIMO-SAR[J].Journal of Xidian University, 2018, 45(2): 148-153+159.

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[1]	SHAO Peng;XING Mengdao;LI Xueshi;LI Yachao . Squinted high resolution SAR based on the frequency synthetic bandwidth [J]. J4, 2015, 42(2): 28-34.
[2]	WU Mingyu;YANG Taoli;WU Shunjun;LI Zhenfang. Novel error estimation method for stepped frequency chirp SAR [J]. J4, 2014, 41(4): 41-46+70.

Novel two-step method of bandwidth synthesis for SF-MIMO-SAR

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