Modified vestigial side band transmission system
US4312064A · kind A · utility
25Cited by
8References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1980 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Jan 25, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J1/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication transmission system includes one or more modulated carrier communication channels in which a receiver has a modified vestigial side band filter for eliminating phase cancellation. Accurate design of the modified vestigial side band filters at the receivers, further reduces susceptibility to frequency drift caused by component aging and component response to environmental changes. The system has particular utility in multiple channel carrier telephone communication systems which utilize limited available band width for providing a maximum number of communication channels over an extended length communication line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.