GSM-R车载无线终端抗干扰技术研究

Research on Anti-interference Technology of GSM-R Vehicle Wireless Terminal

在当前高速铁路运营中,车载无线终端极易受到中国移动、联通等公司的GSM基站造成的阻塞、互调等各种干扰,导致CTCS-3降级、CIR语音通信掉话等。影响到铁路正常运营,甚至危及铁路交通安全。针对以上干扰,提出在车载无线终端前增加易于集成和设计的射频前端电路的设计方案。实验表明,该方案显著提高了车载无线终端的抗干扰性能。

In the operation of current high speed railway, the vehicle wireless terminals are sus- ceptible to blocking and inter-modulation interferences caused by GSM base stations of China Mo- bile and China Unicorn. Those interferences could frequently lead to the degradation of CTCS-3 system and call-drops in CIR voice communication, which might affect the normal operation of railway and even compromise the safety of railway traffic. In view of the interferences above men- tioned, we propose a design of adding a RF frond-end circuit which can be easily integrated with the vehicle wireless terminals. The experimental results have concluded that the proposed design can significantly improve the anti-interference performance of the vehicle wireless terminal.