Digital transmission system
US5796783A · kind A · utility
24Cited by
2References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 31, 1995 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Oct 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0057
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A waveform generating system generates one or more quadrature amplitude modulated (QAM) spectrum pairs which are combined with a frequency modulated (FM) spectrum in the center. The QAM spectrums are offset in frequency to result in a gap in the center to allow combining of the FM spectrum without interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.