Wireless transmission apparatus and self-checking method of wireless transmission apparatus
US8665938B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2012 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/525
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless transmission apparatus includes a service processing unit, a duplexer, a radio frequency receiving unit, a frequency synthesizer, and a controller. The controller controls, according to a reduced TR interval, the frequency synthesizer to adjust a frequency of a local oscillation signal which is output by the frequency synthesizer to the radio frequency receiving unit. The service processing unit continues to send a service signal as a self-checking signal, and a part of the self-checking signal leaks into the radio frequency receiving unit through the duplexer. After the radio frequency receiving unit mixes a received signal with the local oscillation signal, a frequency of the self-checking signal included in an output signal falls within a pass-band range of an intermediate frequency receiving unit, which ensures that the self-checking signal can be looped back to the service processing unit, thereby determines whether a fault occurs in its own transmission channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.