Error detection/correction coding for hierarchical QAM transmission systems
US7073116B1 · kind B1 · utility
61Cited by
3References
19Claims
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Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Aug 9, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3488
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The power of the respective codes used by the first and second error detection/correction circuitry are such that the coded bit error rate of the first data stream is more closely matched to the coded bit error rate of the second data stream. A hierarchical QAM system allows the transmission of different sources by embedding the relative constellation points. The hierarchical QAM transmitter encodes the first data stream using a code having a first detection/correction power and encodes the second data stream using a code having a second detection/correction power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.