第三章对无线电频率的信道进行了性能分析，结合本工程的通信距离进行了分析、比较。
The properties of radio frequency's channel are analyzed in chapter 3, and comparison is made using the communications distance in this project work.
第三章对无线电频率的信道进行了性能分析，结合本工程的通信距离进行了分析、比较。
The properties of radio frequency's channel are analyzed in chapter 3, and comparison is made using the communications distance in this project work.
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