Boots – shoes – and leggings
Patent
1979-06-15
1981-10-06
Malzahn, David H.
Boots, shoes, and leggings
G06F 15332
Patent
active
042939216
ABSTRACT:
A signal processor and method for processing N discrete samples of a quantized time domain signal to determine the frequency content or frequency spectrum of the time domain signal. Real and imaginary components of the quantized signal are processed in accordance with a decomposition technique that eliminates considerable hardware and reduces processing time. In a multiple stage processor, interstage multipliers are eliminated. One such disclosed processor includes a first data memory stage for storing the discrete samples of the quantized time domain signal and for retrieving the stored samples in a predetermined order in which component positions are circularly rotated by a predetermined number of positions from the order of storage thereof. An L-point computational stage receives the retrieved samples of the quantized time domain signal and calculates real and imaginary output signals representing the solution to an L-point discrete Fourier transform. A second data memory stage stores the real and imaginary output signals from said L-point computational stage. An M point computational stage, where N=LM and L and M are relatively prime numbers, receives the retrieved output signals and calculates real and imaginary output signals representing the solution to an LM point discrete Fourier transform.
REFERENCES:
patent: 3783258 (1974-01-01), Chwastyk
patent: 3920978 (1975-11-01), Schmitt et al.
Malzahn David H.
Martin Marietta Corporation
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