Area-efficient FFT processors for OFDM systems
Sung Kyung Shin, Myung Hoon Sunwoo · 2014
This paper proposes an area-efficient 128-point fast Fourier transform (FFT) processor for OFDM systems. The modified decomposition method and complex constant multiplier can reduce the number of twiddle factor multipliers and its ROMs. Compared with the existing FFT processor, the proposed processor can reduce the number of multipliers by 30% and the size of ROM by 62% respectively, without increase of delay elements.