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 |
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出版状态 | 已出版 - 2015 |
活动 | IET International Radar Conference 2015 - Hangzhou, 中国 期限: 14 10月 2015 → 16 10月 2015 |
会议
会议 | IET International Radar Conference 2015 |
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国家/地区 | 中国 |
市 | Hangzhou |
时期 | 14/10/15 → 16/10/15 |