多径干扰引起的CTCS-3级无线通信超时分析及电台优化方案

Analysis and Radio Optimization Scheme of CTCS-3 Wireless Communication Timeout Caused by Multipath Interference

在CTCS-3级无线通信超时故障中,直放站多径干扰占比较高。在分析多径干扰造成CTCS-3级无线通信超时机理的基础上,从减小邻区同步周期、增加快速邻区同步算法、提升FCCH同步精度等方面,提出一种针对自主化MT电台的优化方案。通过现场试验验证了该方案的有效性,能够显著降低因多径干扰引起CTCS-3级无线通信超时的故障率,并可将其推广运用于其他电台的优化中。

In the occurrences of wireless communication timeout of the CTCS-3 train control system,those caused by multipath interference from the repeater is relatively higher.On the basis of analyzing the theory of C3 wireless communication time-out caused by multipath interference,we propose an optimization scheme of autonomous Mobile Terminal by reducing the synchronization period of adjacent cells,adopting the fast adjacent cells synchronization algorithm and improving the precision of FCCH synchronization.It is shown in field tests that the optimization scheme is effective and the failure rate of C3 wireless communication timeout caused by multipath interference can be significantly reduced,which is applicable to the optimization of other Mobile Terminal.