Transmission circuit and transmission method
US8488497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2010 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Aug 6, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/033
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmission circuit that performs modulation based on a phase difference signal and an amplitude signal includes an asymmetrical phase rotation device. The asymmetrical phase rotation device performs an operation of subtracting 2π from a value of the phase difference signal when the value of the phase difference signal is greater than a predetermined positive threshold value, or an operation of adding 2π to the value of the phase difference signal when the value of the phase difference signal is less than a predetermined negative threshold value. Accordingly, the transmission circuit has distortion reduction characteristics improved uniformly over a range of frequencies higher or lower than a carrier wave band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.