Abstract
A chip set for high-speed radix-2 fast Fourier transform (FFT) applications up to 512 points is described. The chip set comprises a (16+16)/spl times/(12+12)-bit complex number multiplier, and a 16-bit butterfly chip for data reordering, twiddle factor generation, and butterfly arithmetic. The chips have been implemented using a standard cell design methodology on a 2-/spl mu/m bulk CMOS process. Three chips implement a complex FFT butterfly with a throughput of 10 MHz, and are cascadable up to 512 points. The chips feature an offline self-testing capability.
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