Method to reduce the power consumation of a digital filter bank analyzer reducing the number of multiplications
US5436859A · kind A · utility
Inventors
Key dates
| Filing date | Mar 17, 1994 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital filter bank analyzer for reducing power consumption by decreasing the number of multiplications carried out therein. There is particularly provided a filter bank analyzer for use in battery-operated applications. The digital filter bank analyzer includes a zero-filled expanded digital basic filter [H.sub.1 (z)] having a complementary output, and downstream, parallel part-filter banks [H.sub.D1,H.sub.D2 ]. In the present context, a zero-filled filter pertains to a filter which may be used on an LP-filter that which is expanded with a number of zero-filter coefficients between each coefficient in the original filter. The part-filter bank [H.sub.D1 ] connected to the normal output of the basic filter [H.sub.1 (z)] is intended to filter-out those filter-bank bands which are pass bands to the basic filter, so that only one of the filter-bank bands is found on each output signal from said one part-filter bank [H.sub.D1 ]. The other part-filter bank [H.sub.D2 ] connected to the complementary output of the basic filter [H.sub.1 (z)] is intended to filter-out those filter-bank bands which are pass bands to the complementary output of the basic filter, so that only one filter-bank …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.