A low-power, high-performance, 1024-point FFT processor

This paper presents an energy-efficient, single-chip, 1024-point fast Fourier transform (FFT) professor. The 460 000-transistor design has been fabricated in a standard 0.7 mu m (L-poly = 0.6 mu m) CMOS process and is fully functional on first-pass silicon. At a supply voltage of 1.1 V, it calculates a 1024-point complex FFT in 330 mu s while consuming 9.5 mW, resulting in an adjusted energy efficient more than 16 times greater than the previously most efficient known FFT processor. At 3.3 V, it operates at 173 MHz-which is a clock rate 2.6 times greater than the previously fastest rate.