Modulation and demodulation based on hierarchical modulation
US7599446B2 · kind B2 · utility
3Cited by
8References
6Claims
0Family size
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Key dates
| Filing date | Sep 15, 2003 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Aug 17, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0003
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modulation device comprises a modulation unit (2) that modulates data in a hierarchical manner using multiple types of modulation techniques, and a transmission unit (3) that transmits the hierarchically modulated data. A demodulation device comprises a receiving unit (4) that receives the hierarchical modulation data having been subjected to hierarchical modulation using multiple types of modulation techniques, and a demodulation unit (6) that demodulates the hierarchical modulation data using a demodulation technique corresponding to a specific hierarchy of the hierarchical modulation data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.