Apparatus and a method for generating a radio frequency signal
US10516563B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2015 |
| Grant date | Dec 24, 2019 |
| Priority date | — |
| Expiry date | Sep 25, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03C2200/0058
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for generating a radio frequency signal based on a symbol within a constellation diagram is provided. The constellation diagram is spanned by a first axis representing an in-phase component and an orthogonal second axis representing a quadrature component. The apparatus includes a processing unit configured to select a segment of a plurality of segments of the constellation diagram containing the symbol. The segment is delimited by a third axis and a fourth axis each crossing the origin of the constellation diagram and spanning an opening angle of the segment of less than about 90°. The processing unit is further configured to calculate a first coordinate of the symbol with respect to the third axis, and a second coordinate of the symbol with respect to the fourth axis. The apparatus further includes a plurality of digital-to-analog converter cells configured to generate the radio frequency signal using the first coordinate and the second coordinate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.