Method and device for transmitting and identifying a modulation type in digital communication systems by way of a phase rotation factor applied to a training sequence
US7313204B2 · kind B2 · utility
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5References
5Claims
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Key dates
| Filing date | Nov 12, 2003 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Oct 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2067
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Data symbols in the training sequence are rotated at the transmitter end through a phase rotation factor which is specific for a given modulation type that is used. For blind modulation detection at the receiver end, the data symbols are derotated through different phase rotation factors, and a correlation function is formed between the sequences obtained in this way and the original training sequence. The type of modulation which is used is obtained from the phase rotation factor which produces a maximum for the correlation function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.