Spectrum analyzer using digital filters
US4093989A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1976 |
| Grant date | Jun 6, 1978 |
| Priority date | — |
| Expiry date | Dec 3, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/167
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spectrum analyzer using digital filters for providing third octave spectrum analysis comprises means for breaking up input information into a plurality of digital data blocks, each block being of a given time duration and being within respective frequency ranges, means for weighting the information contained in the data blocks and means for digitally filtering the weighted digital data blocks with digital filtering devices having at least one center frequency falling within the frequency range represented by each of the data blocks, each of the data blocks comprising N samples satisfying the following equation- N >Kf.sub.o/ B.sub.n Where K is a constant which is a function of the sampling rate and the falloff rate of the skirt of filter characteristic, B.sub.n is the filter bandwidth and f.sub.o is the center frequency of the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.