Differential correlator filter for efficient ToF peak finding
US12135374B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 2022 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Feb 8, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A differential correlator filter includes: a pre-pulse region, where first filter coefficients in the pre-pulse region have negative values; and a pulse region including: a rising edge region adjacent to the pre-pulse region, where second filter coefficients in the rising edge region have positive values; an accumulation region adjacent to the rising edge region, where third filter coefficients of the accumulation region have positive values; and a falling edge region adjacent to the accumulation region, where fourth filter coefficients of the falling edge region have positive values, where the accumulation region is between the rising edge region and the falling edge region. The differential correlator filter further includes a post-pulse region adjacent to the pulse region, where the pulse region is between the pre-pulse region and the post-pulse region, where fifth filter coefficients of the post-pulse region have negative values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.