Implementation of a Two-Dimensional FFT/IFFT Processor for Real-Time High-Resolution Synthetic Aperture Radar Imaging

Hung Yuan Chin, Pei Yun Tsai, Szy Yuan Lee

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

The demand of high-resolution synthetic aperture radar (SAR) images entails large-size fast Fourier transform (FFT) in the range and azimuth directions and makes real-time processing a challenging task. A 2D-FFT/IFFT processor is implemented to support 8192-, 16384-, and 32768-point range FFT/IFFT and 8192-point azimuth FFT/IFFT. To exploit the burst read/write of external DDR memory for access efficiency, azimuth decomposition is adopted. Besides, normal-order input for azimuth FFT and bit-reversed order input for azimuth IFFT are designed to save latency and storage for re-ordering. The control logic for look-up tables of twiddle factors in normal-order FFT and bit-reversed-order IFFT given azimuth decomposition is derived and a significant ROM-table reduction is achieved. The radix-23 single-path delay feedback (SDF) architecture is employed to reduce the number of complex multipliers and to allow for streaming input/output. A customized floating-point data-path is utilized. The maximum operating frequency is 111MHz of our 2D-FFT/IFFT processor realized by Xilinx ultrascale VU37P HBM FPGA. The SQNR achieves more than 48dB for one transformation and about 38dB for successive 2D- FFT and 2D-IFFT operations. We demonstrate a promising solution of2D FFT/IFFT for real-time SARimaging.

原文???core.languages.en_GB???
主出版物標題Proceedings - 2021 IEEE Workshop on Signal Processing Systems, SiPS 2021
發行者Institute of Electrical and Electronics Engineers Inc.
頁面211-216
頁數6
ISBN(電子)9781665401449
DOIs
出版狀態已出版 - 2021
事件2021 IEEE Workshop on Signal Processing Systems, SiPS 2021 - Coimbra, Portugal
持續時間: 19 10月 202121 10月 2021

出版系列

名字IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation
2021-October
ISSN(列印)1520-6130

???event.eventtypes.event.conference???

???event.eventtypes.event.conference???2021 IEEE Workshop on Signal Processing Systems, SiPS 2021
國家/地區Portugal
城市Coimbra
期間19/10/2121/10/21

指紋

深入研究「Implementation of a Two-Dimensional FFT/IFFT Processor for Real-Time High-Resolution Synthetic Aperture Radar Imaging」主題。共同形成了獨特的指紋。

引用此