Tagging echoes with low frequency noise
US6301364A · kind A · utility
20Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1999 |
| Grant date | Oct 9, 2001 |
| Priority date | — |
| Expiry date | Oct 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A low pass limited, low frequency pseudo-random noise signal is added to the input signal for tagging the input signal in order to facilitate correlation with an echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.