Signal structure for data communication
US4660213A · kind A · utility
6Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1983 |
| Grant date | Apr 21, 1987 |
| Priority date | — |
| Expiry date | Nov 22, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3455
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A signal structure for high speed data communication selects each signal point in the structure to attain a low probability of error in the presence of both additive noise and multiplicative noise. Transmission apparatus for practice of the invention employs an encoder which responds to digital data to produce a QAM signal having parameters selected according to the new signal structure, and receiving apparatus employs a decoder which converts a received QAM signal to digital values according to the same structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.