Echo detection
US7656750B2 · kind B2 · utility
2Cited by
4References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 2008 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Sep 14, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An echo detection circuit that detects an echo by detecting the magnitude of a digitally mixed representation of the received acoustic signal and reference sine and cosine signals. That magnitude is then compared against an echo threshold to verify the presence or absence of an echo signal. A low pass filter with a configurable cut-off frequency may be used to define the selectivity of the echo detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.