双站前视低频超宽带SAR的快速因式分解后向投影算法成像处理

doi:10.11999/JEIT150736

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Abstract

Bistatic forward looking low frequency Ultra Wide Band (UWB) Synthetic Aperture Radar (SAR) has both complicated imaging geometry and strong range-azimuth coupling, which increases the difficulty of high-precision imaging extremely. In order to solve this problem, this paper proposes an approach based on Fast Factorized Back Projection (FFBP) algorithm to focus the low frequency UWB Bistatic Forward-looking SAR (BFSAR) data. First, based on the imaging geometry of BFSAR, the principle and implementation of Back Projection (BP) algorithm are presented. Then, the phase error in FFBP algorithm is analyzed, and the formula of the phase error in bistatic forward looking SAR is derived. The implementation of FFBP algorithm is presented, and the computational burden of BP algorithm and FFBP algorithm are estimated and compared. Finally, the simulation experiment is progressed, and the results prove the correctness of analysis and the validity of the proposed approach.

Key words： Bistatic Forward-looking SAR (BFSAR) Fast Factorized Back Projection (FFBP) Low frequency Ultra Wide Band (UWB)

Received: 18 June 2015 Published: 26 February 2016

PACS:

TN958

Fund:

The National Natural Science Foundation of China (61571447, 61201329)

Corresponding Authors: AN Daoxiang E-mail: daoxiangan@nudt.edu.cn

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	FENG Dong
	AN Daoxiang
	XIE Hongtu
	HUANG Xiaotao

Cite this article:

FENG Dong,AN Daoxiang,XIE Hongtu等. Fast Factorized Back Projection Algorithm for Bistatic Forward-looking Low Frequency Ultra Wide Band SAR Imaging[J]. JEIT, 2016, 38(4): 941-949.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT150736 OR http://jeit.ie.ac.cn/EN/Y2016/V38/I4/941

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