Communication system for a power distribution line
US5581229A · kind A · utility
175Cited by
53References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1993 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Jul 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/121
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a layered modulation data communication systems characterized by numerous, asynchronous data transmitters operating on a power line. Data is modulated onto relatively low frequency subcarriers. Subcarriers are used to modulate carriers centered on a common frequency. The subcarriers are frequency division multiplexed. Data is recovered by demodulating the subcarriers from the carriers and subsequently demodulating the data from the subcarriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.