Filtering a signal with the use of approximate arithmetical division
US5325319A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1993 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Nov 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H21/0012
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Filtering a signal with an adaptive digital filter includes updating the filter by performing an approximate division of a constant number by a variable number in binary form. The variable number represents a magnitude of energy of the signal to be filtered, and consists of a character bit and a plurality of bits which define the absolute value of the number. The variable number is first transformed by substituting with logic zeros any logic ones that have a lower significance than the most significant logic one of the bits. The first transformed number is then further transformed by reading the character bit of the variable number as a character bit and by reading the bits in the digital word in a reversed order. The resulting value is applied to adjust the adaptive digital filter which filters the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.