Communication apparatus
US8958505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2013 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Jul 26, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/2957
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to reduction of operation amount of likelihood calculation (LLR calculation) in a communication apparatus for performing communications using an extended mapping in which a plurality of bit sequences are assigned to a single symbol point. A receiving unit receives a signal which is transmitted from a transmitting unit by using the extended mapping. A repetition process unit decodes the received signal from the receiving unit by calculating an LLR of the received signal and performing a repetition process. In this case, the LLR is calculated for every bit using a MAX-LOG approximation and a thus-derived approximation formula is multiplied by weighting factors corresponding to proportions of “0” and “1” in each bit assigned to a symbol point closest to the received signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.