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http://dx.doi.org/10.12673/jant.2018.22.5.429

Scalable FFT Processor Based on Twice Perfect Shuffle Network for Radar Applications  

Kim, Geonho (School of Electronics and Information Engineering, Korea Aerospace University)
Heo, Jinmoo (School of Electronics and Information Engineering, Korea Aerospace University)
Jung, Yongchul (School of Electronics and Information Engineering, Korea Aerospace University)
Jung, Yunho (School of Electronics and Information Engineering, Korea Aerospace University)
Abstract
In radar systems, FFT (fast Fourier transform) operation is necessary to obtain the range and velocity of target, and the design of an FFT processor which operates at high speed is required for real-time implementation. The perfect shuffle network is suitable for high-speed FFT processor. In particular, twice perfect shuffle network based on radix-4 is preferred for very high-speed FFT processor. Moreover, radar systems that requires various velocity resolution should support scalable FFT points. In this paper, we propose a 8~1024-point scalable FFT processor based on twice perfect shuffle network algorithm and present hardware design and implementation results. The proposed FFT processor was designed using hardware description language (HDL) and synthesized to gate-level circuits using $0.65{\mu}m$ CMOS process. It is confirmed that the proposed processor includes logic gates of 3,293K.
Keywords
Fast Fourier transform; Perfect shuffle network; Radar system; Radix-4;
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