通过简述多种调制方式中频信号数字产生的基本处理方法，提出了一种具体实施方案，并分析了其技术特点。
This paper discusses the digital generation method for communication IF signals and proposes a concrete implementation resolution and analyzes its technical characteristics.
有多种连接方式可供选择，因为标准中并未涵盖零调制解调器连接。
Several wiring layouts are in use, because the null modem connection is not covered by a standard.
无线光通信的调制方式有多种，但缺少综合系统的分析。
There are so many modulations of optical wireless communication, but it is very few of their systematic analysis.
无线光通信的调制方式有多种，但缺少综合系统的分析。
There are so many modulations of optical wireless communication, but it is very few of their systematic analysis.
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