Method and apparatus for maximizing efficiency in satellite communications
US4593399A · kind A · utility
11Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1983 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | May 9, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/015
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a data communication system involving modems transmitting over a link including terrestrial and one or more satellite links, a nontransmitting modem sends a secondary channel tone during the absence of data transmission. The cessation of said tone is detected by the other modem and used to de-squelch the remote modem receiver. In this manner, the receiver is protected from echoes impinging upon it during long transmission delay times. This method optimizes data throughput by adapting to the transmission delay of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.