Modem suited for wireless communication channel use
US4852122A · kind A · utility
27Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1987 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | Aug 31, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0262
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The modem of this invention overcomes problems associated with use in a wireless radio frequency communications channel. This modem provides a data carrier detection (DCD) function for associated data terminal equipment even though a transmission carrier or tone is not used. Provision is also made for communicating with data terminal equipment operating at a substantially lower data rate than the modem data rate without requiring a reduction in the modem data rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.