16-point high speed (I)FFT for OFDM modulation
S. Bertazzoni, G.C. Cardarilli, M. Iannuccelli, Marcello Salmeri, A. Salsano, O. Simonelli · 1998
In this paper we present the implementation of a 16-point (I)FFT ((Inverse) Fast Fourier Transform) with 24-bit complex data precision suitable for OFDM applications. The die measures 3.2/spl times/3.3 mm/sup 2/ and is fabricated in double metal 0.7 /spl mu/m ES2 CMOS technology. Our algorithm does not use any multiplier allowing a throughput up to 85 MWord/s and reducing the core area to less than 5 mm/sup 2/. It is also possible to implement a 256-point (I)FFT using two 16-point devices and a complex multiplier.