基于FPGA的FFT处理器设计

Design of FFT processor based on FPGA

针对快速傅里叶变换(FFT)算法的结构和特点,提出了一种基于现场可编程门阵列(FPGA)设计FFT运算的方案。该方案采用基2算法以及单元结构的设计思路,对FFT处理器合理模块化,用VHDL语言对各个模块编程,并在QuartusⅡ软件环境下综合仿真,时序分析结果与Matlab计算结果相一致验证了设计的正确性。FFT与FPGA相结合提高了运算速度,扩大了FFT的应用领域。

Based on the structure and the operational characteristics of fast fourier transform （FFT）, a implementation method of FFT in field programmable gate array（FPGA） is presented,It employed radix- 2 algorith and divided the FFF processor several modules,and carried out the programming with the VHDL to each module,The succession analysis result and the Matlab computed result compared has confirmed the design accuracy under Quartus Ⅱ software environment comprehensive simulation,The combination of FPGA and FFT increased the handling speed of FFT processors and expanded in the field of application.