WIRELESS TRANSMISSION DEVICE AND SELF-CHECKING METHOD THEREOF,申请号EP20110752854-传众专利搜索

WIRELESS TRANSMISSION DEVICE AND SELF-CHECKING METHOD THEREOF

申请公布号：EP2458792(A4)

申请号：EP20110752854

申请日期：2011.03.23

申请公布日期：2012.05.30

申请人：

HUAWEI TECHNOLOGIES CO., LTD.

发明人：YU, GUOBIN;LIN, HONGYONG;WANG, YICAI

分类号：H04L12/437;H04B1/40;H04B7/26;H04B17/00;H04L12/26

主分类号：H04L12/437

摘要：<p>Embodiments of the present invention disclose a wireless transmission apparatus and a self-checking method thereof. The wireless transmission apparatus includes a service processing unit, a duplexer, a radio frequency receiving unit, a frequency synthesizer, and a controller. The controller starts a self-checking function, reduces a TR interval into a preset range, and controls, according to the 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 after the self-checking signal is modulated into a radio frequency signal, 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, and thereby determines whether a fault occurs in its own transmission channel.</p>