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A VLSI array processor for 16-point FFT

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3 Author(s)
Moon-Key Lee ; Dept. of Electron. Eng., Yonsei Univ., Seoul, South Korea ; Shin, Kyung-Wook ; Lee, Jang-Kyu

An implementation of a two-dimensional array processor for fast Fourier transform (FFT) using a 2-μm CMOS technology is presented. The array processor, which is dedicated to 16-point FFT, implements a 4×4 mesh array of 16 processing elements (PEs) working in parallel. Design considerations in both the chip level and the PE level are examined. A layout design methodology based on bit-slice units (BSUs) results in a very simple design, easy debugging, and a regular interconnection scheme through abutment. It contains about 48,000 transistors on an area of 53.52 mm2, excluding the 83-pad area, and operation is on a 15-MHz clock. The array processor performs 24.6 million complex multiplications per second, and computes a 16-point FFT in 3 μs

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:26 ,  Issue: 9 )