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High-Speed Pipeline Implementation Of Radix-2 Dif Algorithm

Authors: Christos Meletis; Paul Bougas; George Economakos; Paraskevas Kalivas; Kiamal Pekmestzi;

High-Speed Pipeline Implementation Of Radix-2 Dif Algorithm

Abstract

{"references": ["", "C.-H. Chang, C.-L. Wang, Y.-T. Chang, \"Efficient VLSI architectures for fast computation of the discrete Fourier transform and its inverse,\" IEEE Trans. on Signal Processing, vol. 48, Nov. 2000, pp. 3206-3216.", "J. Choi and V. Boriakoff, \"A new linear systolic array for FFT computation,\" IEEE Trans. Circuits Syst. II, vol. 39, Apr. 1992, pp. 236-239.", "V. Boriakoff, \"FFT computation with systolic arrays, a new architecture,\" IEEE Trans. Circuits Syst. II, vol. 41, Apr. 1994, pp. 278-284.", "L.-W Chang and M.-Y. Wu, \"A new systolic array for discrete Fourier transform,\" IEEE Trans. Acoust., Speech, Signal Processing, vol.36, Oct. 1988, pp.1165-1167.", "N. R. Murphy and M. N. S. Swamy, \"On the real-time computation of DFT and DCT through systolic architecture, \" IEEE Trans. Signal Processing, vol. 42, Apr. 1993, pp. 988-991.", "E. H. Wold and A. M. Despain, \"Pipeline and parallel-pipeline FFT processors for VLSI implementations,\" IEEE Trans. On Computers, vol. C-33, No 5, pp. 414-426, May 1984.", "N. Weste and D. J. Skellern, \"VLSI for OFDM,\" IEEE Communications Magazine, pp. 127-131, Oct. 1998", "E. Bidet, D. Castelain, C. Joanblanq and P. Senn, \"A Fast-Chip implementation of 8192 complex point FFT,\" IEEE Journal of Solid-State Circuits, vol 30, No.3, pp. 300-305, March 1995.", "K. Z. Pekmestzi, "Complex number multipliers," IEE Proceedings, Vol.136, Part E, No. 1, pp. 70-75, Jan. 1989."]}

In this paper, we propose a new architecture for the implementation of the N-point Fast Fourier Transform (FFT), based on the Radix-2 Decimation in Frequency algorithm. This architecture is based on a pipeline circuit that can process a stream of samples and produce two FFT transform samples every clock cycle. Compared to existing implementations the architecture proposed achieves double processing speed using the same circuit complexity.

Keywords

systolic circuits, Digital signal processing, FFTalgorithm.

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