The SFN adapter studied here is one of the key equipments of the SFN.
本文所研究的单频网适配器，是实现单频网组网的关键设备之一。
Secondly, the integral scheme of SFN adapter's implementation is proposed.
其次，本文提出了单频网适配器实现的整体方案。
Firstly, we analyzed the structure of SFN and the principle of the synchronization.
首先，本文分析了单频网的组网方式和同步原理。
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