A novel memory-based FFT processor for DMT/OFDM applications | IEEE Conference Publication | IEEE Xplore

A novel memory-based FFT processor for DMT/OFDM applications


Abstract:

This paper presents a novel VLSI architecture for computing the N-point discrete Fourier transform (DFT) based on a radix-2 fast algorithm, where N is a power of two. The...Show More

Abstract:

This paper presents a novel VLSI architecture for computing the N-point discrete Fourier transform (DFT) based on a radix-2 fast algorithm, where N is a power of two. The architecture consists of one complex multiplier, two complex adders, and some special memory units. It can compute one transform sample every log/sub 2/N+1 clock cycles in average. For the case of N=512, the chip area required is about 5742/spl times/5222 /spl mu/m/sup 2/ and the throughput is up to 4 M transform samples per second under 0.6 /spl mu/m CMOS technology. Such area-time performance makes the proposed design rather attractive for use in long-length DFT applications, such as ADSL and OFDM systems.
Date of Conference: 15-19 March 1999
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-5041-3
Print ISSN: 1520-6149
Conference Location: Phoenix, AZ, USA

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