Apparatus and method for soft demapping
US8831123B2 · kind B2 · utility
1Cited by
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16Claims
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Key dates
| Filing date | May 30, 2012 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | May 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/067
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided is a soft demapping apparatus that may detect a log likelihood ratio (LLR) value of a quadrature amplitude modulation (QAM) signal, using a shifted table scheme, may designate a sub-region of the QAM signal corresponding to bit information that is obtained by decoding the LLR value, and may calculate an LLR value of other bit information included in the designated sub-region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.