Normalized error compensator for modems using radial amplitude modulation for multiplexing
US4534026A · kind A · utility
4Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1983 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Dec 6, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/38
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a receiver for multiplexed QAM/PSK signals which have been radial amplitude modulated for synchronization, an error signal is generated by each received signal to the corresponding ideal point as mapped in the complex plane. A synchronizing signal is generated and synchronized by the error signal and is used for both demultiplexing, and amplitude demodulating the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.