Reducing peak spectral error in inverse Fast Fourier Transform using MMX.TM. technology
US5991787A · kind A · utility
27Cited by
13References
36Claims
0Family size
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Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for computing a decimation-in-time Fast Fourier Transform of a sample is provided, the method including inputting first 2B-bit values representing the sample into a radix-4 first section of the decimation-in-time Fast Fourier Transform and performing first complex 2B-bit integer additions and subtractions on the first 2B-bit values to form second 2B-bit values, without performing a multiplication. The method also includes rounding the second 2B-bit values to form B-bit values output from the radix-4 first section of the decimation-in-time Fast Fourier Transform.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.