Boots – shoes – and leggings
Patent
1988-10-17
1991-02-12
Malzahn, David H.
Boots, shoes, and leggings
G06F 1531
Patent
active
049929674
ABSTRACT:
A digital filter having parallel paths with a plurality of transverse filters in the paths. The period of treating the digital information of N connections at the output of a circuit for calculating the discrete Fourier transform on 2N points. The output of the transverse filter is fed to a circuit for calculating the inverse Fourier transform. These two circuits permit the transverse filters to function in each path with a data period of N. The filter will find particular application in convolvers, courolaters, and for circuits for the compression of digital pulses. The filter lends itself to application, particularly in radar, sonar, telecommunications, and in sound and imaging systems.
REFERENCES:
patent: 4093994 (1978-06-01), Nussbaumer
patent: 4100604 (1978-07-01), Perreault
patent: 4530076 (1985-07-01), Dwyer
patent: 4807173 (1989-02-01), Sommen et al.
Schaller Nachrichtentechnische Zeitschrift "Verwendung der Schnellen Fourier Transformation in Digital en Filtern" vol. 27, No. 11, pp. 425-431 Nov. 1974.
IEEE Transactions on Acoustics, Speech, and Signal Processing, No. 2, pp. 109-114 Apr. 1976, "Digital Filtering by Polyphase Network".
IEEE ASSP Magazine, vol. 3, No. 3, pp. 6-11 Jul. 1986, Bellanger, "New Applications of Digital Signal Processing in Communications".
"Thomson-CSF"
Malzahn David H.
Plottec Roland
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