Very-high-speed frequency-domain FFT windowing device

Details Very-high-speed frequency-domain FFT windowing device Very-high-speed frequency-domain FFT windowing device

1989-11-21

1991-07-16

Malzahn, David H.

Boots, shoes, and leggings

36472418, G06F 15332

Patent

active

050330195

ABSTRACT:
A frequency-domain Fast Fourier Transform windowing device includes a plurality of input lines, each of which is coupled to a corresponding frequency bin output line of an FFT; and a memory. The memory includes address input ports connected to the input lines and an output line. The memory reads out onto the output line values read out from the locations in the memory corresponding to signals received at the address input ports. The memory has stored in it values corresponding to the coneolution of samples on several of the input lines and the corresponding predetermined weighting coefficients.

REFERENCES:
patent: 4231103 (1980-10-01), Timm
Nussbaumer, "Efficient Implementation of Convolutions & Discrete Transforms Using Polynomial Transforms & Distributed Arithmetic", IBM Tech. Disclosure Bulletin vol. 2, No. 6, Nov. '78, pp. 2374-2375.
Liv et al., "A New Hardware Realization of high-Speed Fast Fourier Transformers", IEEE Trans. on Acoustics, Speech & Signal Processing vol. ASSP-23, No. 6, Dec. '75, pp. 543-547.
Chow et al., "A Pipelined Distributed Arithmetic PEFT Processor", IEEE Trans. on Computers C-32, No. 12 Dec. '83, pp. 1128-1136.
Kaiser et al., "On the Use of the I.sub.o -Sinh Window for Spectrum Analysis", IEEE Trans. on Acoustics, Speech & Signal Processsing vol. ASSP-28, No. 1, Feb. '80, pp. 105-107.
Harris, "On the Use of Windows for Harmonic Analysis with the Discrete Fourier Transform", Proceeding of the IEEE vol.-66, No. 1, Jan. '78, pp. 51-83.

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