提出了解决地下建筑物内接收无线电寻呼信息的一种方法，并提供了一个实用的同频无线电寻呼中继器及其设计。
A method of receiving radio paging signal in underground building is proposed, and a practical identical frequency radio paging repeater and its design are provided.
给出了现代实用型原子钟的性能指标比较表，和用现代无线电手段传递、比对时频标准信号达到的指标。
The comparison table of modern practical atom clock's performance index is given. The index of transferring and comparing standard time-frequency signal by modern radio means is also listed.
方案具有配置灵活、成本低、速度快、实现简单的特点，目前已在很多软件无线电项目中得到应用，具有很强的实用性。
This configuration method has the benefit of low cost and complexity, high speed and flexibility, and has been selected in several software-defined radio projects, so it is very practical.
方案具有配置灵活、成本低、速度快、实现简单的特点，目前已在很多软件无线电项目中得到应用，具有很强的实用性。
This configuration method has the benefit of low cost and complexity, high speed and flexibility, and has been selected in several software-defined radio projects, so it is very practical.
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