Adaptive phase-distortionless magnitude response equalization (MRE) for beamforming applications
US9838783B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2015 |
| Grant date | Dec 5, 2017 |
| Priority date | — |
| Expiry date | Jan 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A time domain impulse response filter may be used to equalize signals in the time domain to avoid error and artifacts that are introduced by domain transforms such as the IFFT. The disclosed time domain impulse response filter is based on the magnitude responses of the individual signals. The magnitude responses for each signal may be calculated in the frequency domain or with other techniques such as auto-regressive analysis and mathematical signal approximations algorithms, such as Padé approximations. An adaptive filter may then equalize the input sensor signals in their original time domain form using a filter calculated based on the processed signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.