对地观测技术在铁路勘测设计中的应用

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Abstract Research purposes: Though the analysis of the frequencies and the possible second － order and third － orderintermodulation interferences of the public GSM system and GSM － R system，the computer simulation is made to findout 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．

Key words： GSM － R system GSM system intermodulation interference frequency planning

Received: 22 February 2012

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Cite this article:

SHAO Xiang. Analysis of Intermodulation Interferences of GSM System on GSM － R System[J]. 铁道工程学报, 2012, 29(6): 83-87.

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I6/83

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