Bits-to-symbol mapping method for 4+12+16 APSK modulation
US8503573B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 20, 2010 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Sep 4, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/36
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a bits-to-symbol mapping method of 4+12+16 amplitude phase shift keying (APSK) having excellent performance against the non-linearity of a high power amplifier. According to the present invention A bits-to-symbol mapping method of 4+12+16 APSK modulation, comprising: representing 32 symbols of the 4+12+16 APSK modulation by a polar coordinate and arranging the 32 symbols by a size of θ while giving priority to a symbol having a small signal size when the size of θ of two or more symbols are same; grouping the arranged 32 symbols into 4 groups according to quadrant regions where the symbols are located; and allocating bits so that the same bits are allocated to the symbols belonging to the same region for each region with respect to each of the first to fifth bits of the symbols grouped into four regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.