Lattice structure for IIR and FIR filters with automatic normalization
US6442581B1 · kind B1 · utility
16Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 21, 1999 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Sep 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0285
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus providing a “reverse lattice” structure for IIR and FIR filters, which exhibits desirable scaling properties at no additional computational or memory cost. The reverse lattice structure implementation of an IIR filter scales down signals at sections corresponding to reflection coefficients close to 1 in magnitude. This feature provides automatic scaling for poles lying close to the unit circle which would otherwise produce large amplification factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.