Modulation and demodulation system employing AM-PSK and FSK for communication system using digital signals
US5088111A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2801
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A communication network having a first broadband communications channel or transmitting bus and a second broadband communications channel or receiving bus, wherein the first broadband communications channel is for passing information upstream to a head end and the second broadband communications channel is for passing information downstream from the head end to remote nodes. All nodes of the system are coupled to both the first communications channel and the second communications channel. According to the invention, modulation of signals applied to the first communication channel is optimized for burst communication from a plurality of sources to central control at the head end, and modulation applied to the second communications channel is optimized for continuous communication from the central source to a target node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.