Sinc filter using twisting symmetry
US6546408B2 · kind B2 · utility
2Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1998 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Sep 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0664
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sinc filter is implemented by partitioning 1 bit wide incoming data into multibit words. The multibit words are multiplied by respective coefficient sets. Some multibit words are twisted by inverting the bit order and the multiplied using the same coefficient sets used for untwisted words. Multiplications are implemented using either look up tables or logic and the filter is implemented using only shifts and additions. The sinc filter is particularly useful applications in the field of data acquisition and particularly in the area of seismic sensing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.