Frequency-hopping radio communications system
US4554668A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1983 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | May 20, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/7143
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio communications system comprising at least one master station and a plurality of slave stations in two-way frequency-hopping communication therewith. For telephony, speech is digitally encoded. Digital data is transmitted in packets using successive bursts at different frequencies separated by intervals of silence. Each slave station has its own frequency-hopping pattern independent of the patterns of the other slave stations but sharing a common pool of available frequencies. The master stations are capable of generating any of the slave station patterns instantly. The master stations broadcast network time information for synchronization purposes, and the slave station patterns are determined by a combination of a slave station identification number and network time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.