Mitigation of multipath using ultra wideband DTV overlay signal
US6437832B1 · kind B1 · utility
48Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Oct 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/211
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
DTV broadcast transmission is provided with a ultra wideband overlay signal which is used by suitably equipped DTV receivers to dynamically estimate the channel and allow expeditious and effective mitigation of changing multipath conditions. Periodic correlation peaks are detected in the received overlay signal, and the timing and magnitude of other peaks in the received overlay signal are used to mitigate multipath in the received signal. A DTV receiver that is not equipped to process the overlay transmission will not be significantly affected by the overlay signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.