The principle of digital modulated signal is analyzed in this paper. Based on instant character parameters, a kind of digital communication signal demodulation method is established.

分析了信号数字调制的基本原理，提出一种基于信号瞬时特征参数的数字通信信号解调方法。

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Data Generator can generate very complicated digital signals. It can be used as programmable data signal source in the fields of communication, radar, navigation, space navigation, and so on.

数据信号发生器可以产生非常复杂的数字激励信号，可为通信、雷达、导航、宇航等领域数字设备提供所需的可编程数据信号。

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The modem of analog and digital signal is the center of communication system.

数字与模拟信号的调制解调是通信系统的核心。

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