用实验法对450MHz最小可用接收电平质量的分析
Railway Quality Control(2011)
Abstract
无线信号在空间传播过程中,由于会发生多径反射和受到多普勒效应的影响,其振幅、频率和相位都会发生失真。通过对模拟出失真的450MHz最小可用接收电平的测试表明,在不考虑噪声影响和频率容差时,机车台音频输出信纳比大于20dB,符合TB/T3052—2002《列车无线调度通信系统制式及主要技术条件》的规定。
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Key words
Minimum Useable Receiving Level,Shadow Effect,Doppler Effect,Radio Communication,Multi-path Fading
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