Wide-band direct conversion transmission apparatus
US8014466B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2008 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Mar 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
There is provided a wide-band direct conversion transmitting apparatus including: a local oscillation unit generating first, second, and third oscillation signal pairs each including a pair of signals having a phase difference of 90°; an image rejection mixer unit mixing baseband transmission signals including an I signal and a Q signal having a phase difference of 90° with the first oscillation signal pair; a harmonic rejection mixer unit mixing each of the first, second, and third oscillation signal pairs with the baseband transmission signals; and an output signal selecting unit selecting output signals from the image rejection mixer unit or from the harmonic rejection mixer unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.