A new reconfigurable methodology to implement the shiftand-correlate (SAC) algorithm for real-time SAR autofocusing

Bingyi Li, Yizhuang Xie*, Xiaoning Liu, Yi Deng

*此作品的通讯作者

科研成果: 会议稿件论文同行评审

4 引用 (Scopus)

摘要

Doppler Frequency Rate (FDR) is an essential parameter in the procedure of Synthetic Aperture Radar (SAR) processing. In this paper, we investigate an achievable autofocus algorithm, shift-and-correlate (SAC), and design the implementation of FDR estimation. The proposed method can dramatically improve the accuracy of imaging and reduce the time delay of the SAR imaging process. Depth-of-focus theory and linear fitting theory are discussed in this paper for decreasing the computation-consumption and the preserving precision. We verify the proposed method in a 16384∗16384 SAR imaging process at 100 MHz system clock on a dedicated designed Field Programmable Gate Array (FPGA) tested. To testify the feasibility of the proposed method, we compared our run-out results with existing implementations using traditional DSP and MATLAB methods in terms of real-time performance and imaging quality.

源语言英语
出版状态已出版 - 2015
活动IET International Radar Conference 2015 - Hangzhou, 中国
期限: 14 10月 201516 10月 2015

会议

会议IET International Radar Conference 2015
国家/地区中国
Hangzhou
时期14/10/1516/10/15

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