Title :
Research on implementation of FFT based on FPGA
Author :
Liu, Fangming ; Pan, Xiaozhong
Author_Institution :
Dept. of Electron. Technol., Eng. Coll. of Armed Police Force, Xi´´an, China
Abstract :
The FFT plays an important role in the modulation and demodulation of OFDM system. To meet the requirements of FFT in an OFDM system, the key techniques of the implementation of FFT based on FPGA is discussed in this paper. After the comparison among three typical butterfly units, the one with pipeline processing structure is introduced. Then a recursive structure of FFT on Radix-2 single butterfly is realized. This structure greatly reduced the amount of hardware resource, while an accepted processing speed is guaranteed.
Keywords :
OFDM modulation; fast Fourier transforms; field programmable gate arrays; FFT; FPGA; OFDM system; butterfly unit; demodulation; fast Fourier transforms; field programmable gate arrays; hardware resource; orthogonal frequency division multiplexing; pipeline processing structure; processing speed; radix-2 single butterfly; recursive structure; Read only memory; Butterfly Unit; FFT; FPGA;
Conference_Titel :
Computer Application and System Modeling (ICCASM), 2010 International Conference on
Conference_Location :
Taiyuan
Print_ISBN :
978-1-4244-7235-2
Electronic_ISBN :
978-1-4244-7237-6
DOI :
10.1109/ICCASM.2010.5620808
