（合肥工業大學 計算機與信息學院，安徽合肥 23009）
摘要：正交頻分復用是下一代移動通信關鍵技術之一。通過快速傅里葉變換可以實現OFDM信號的調制解調。本文通過各種FFT算法比較，選取了一種新型快速的基-24FFT算法，采用現場可編程門陣列（FPGA）實現了64點OFDM信號的調制解調。設計中采用單路、多路信號并行傳輸相結合的方式，提高了信號的運算速率。
關鍵詞：正交頻分復用、快速傅里葉變換、調制解調、浮點算法、基-24FFT
OFDM signal modulation and demodulation based on FPGA
YAN Ya-gang, DOU Jian-hua
. （School of Computer And Information, Hefei University of Technology, Hefei23009, China）
Abstract:Orthogonal frequency division multiplexing is one of the key technologies of the next generation of mobile communications. The modulation and demodulation of the OFDM signal can be achieved through the fast Fourier transform. a variety of FFT algorithms，Selected a new rapid-24FFT algorithm。Field programmable gate array (FPGA) to achieve 64 points of the modulation and demodulation of the OFDM signal。Single design, a combination of parallel transmission of multiple signals, to improve the operation rate of the signal.
Keywords:Orthogonal frequency division multiplexing、 fast Fourier transform、 modulation and demodulation、 the floating-point arithmetic、rapid-24FFT
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