GSM系统对GSM-R系统的互调干扰分析

Analysis of Intermodulation Interferences of GSM System on GSM-R System

研究目的:通过分析公网GSM系统和铁路GSM-R系统的频点及可能产生的二阶及三阶互调干扰,用计算机仿真找到可能对铁路GSM-R频率产生干扰的频点组合,给铁路沿线公网GSM系统的频率规划提出建议。研究结论:(1)铁路沿线的公网GSM系统对铁路GSM-R系统产生互调干扰的概率很高;(2)在铁路沿线的公网GSM系统需根据GSM-R系统所使用的频率进行频率规划,以避免对GSM-R系统造成干扰,影响铁路安全运行;(3)运营商在对铁路沿线已建成的GSM网络进行频点调整优化时,需要了解铁路GSM-R使用的频点,再进行优化,避免对GSM-R系统造成干扰。

Research purposes ： Though the analysis of the frequencies and the possible second - order and third - order intermodulation interferences of the public GSM system and GSM - R system, the computer simulation is made to find out the interferences combinations for putting forward the advices on the frequency planning of the public GSM system along the railway. Research conclusions： （ 1 ） The possibility of the intermodulation interferences of the public GSM system on the GSM - R system is high. （2） The frequency planning of public GSM system alone railway shall be planned according to the used frequency of GSM - R system, so that the GSM - R system will not interfered by GSM system and safety of railway operation can be ensured. （3）When the business enterprise adjusts and optimizes the GSM -R network being along the railway, it is necessary to know the frequency points for GSM - R for optimizing to avoid the interference on the GSM - R system.