Communication device and orthogonal error measurement method for communication device
US10419136B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2017 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Nov 9, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/0014
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
According to an embodiment, a communication device includes a phase-shifting circuit that shifts a phase of a local signal and supplies it to an orthogonal demodulator. The phase-shifting circuit includes first and second signal input ends that are supplied with an output signal of a local oscillator between both ends thereof, a frequency divider that has first and second input ends, and a switching part that is provided between the first and second signal input ends and the first and second input ends of the frequency divider and switches connection between the first and second signal input ends and the first and second input ends of the frequency divider.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.