这些无线电系统之间就像光波与声波一样彼此区别，比如，人造卫星就无法追踪射频识别标签。
These radio systems are as different from each other as light is from sound, so satellites cannot track RFID tags, for instance.
这一系统利用射频无线电对记录媒体进行读写操作，完成对马拉松运动员的非接触式自动识别，从而实现运动员成绩计时。
Through identifying no touched automatically the Marathon runner, the timekeeping record of the runner was obtained by utilizing radio frequency to read and write recording medium.
其次，在对射频识别系统的协议和无线电频谱规范进行分析的基础上，确定了阅读器射频前端的体系架构。
Secondly, the architecture of reader front end is determined based on the analysis of RFID protocols and wireless frequency regulations.
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