结合同频载干比综合评价GSM-R网络覆盖质量方案研究

Comprehensive Evaluation of GSM-R Network Coverage Quality Combined with Co-channel Carrier to Interference Ratio(C/I )

同频载干比(C/I)是衡量无线通信系统的重要指标,与场强结合起来更能反映GSM-R网络的运用状态。但同频干扰信号与有用信号在频域叠加在一起,难以用场强接收机和频谱仪测量C/I值。在铁路通信检测系统基础上,比较4种测量同频载干比(C/I)方法,并对推荐方案进行测试,根据测试结果提出了场强与同频载干比(C/I)结合起来评价无线网质量的标准。

Co-channel carrier to interference ratio（C/I）is an important parameter in the judgment of a wireless communication system.With the combination of the radio field strength and C/I,the state of the application of GSM-R network can be better described.However,co-channel interference signal and the useful signal are overlapped in frequency domain so that it is difficult to measure the value of C/I with the field strength receiver or the spectrum analyzer.On the basis of communication test system for railway,four C/I measurement methods was analyzed and compared and the recommended solution was tested.According to the test results,the standard to evaluate the quality of wireless communication network with the combination of radio field strength and C/I is proposed.