The DDS signal generator which can adjust signal phase, signal frequency and complex wave is designed.
最终实现频率、相位、复合波形皆可调节的直接数字合成的信号发生器。
With the increase of the incident wave frequency, the amplitude distribution become complex gradually.
随着入射波频率的增大，位移幅值的分布由简单逐渐变得复杂。
In dynamic state all the medium parameters are complex functions verse frequency, and wave expression is also a complex function verse frequency.
在动态情形下所有的介质参数都是依赖于频率的复函数，波也用频率的复函数表示。
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