After optimization, time domain response of various typical signals and the frequency domain response are simulated.

在优化后，对系统进行了各种典型信号的时域分析和频域分析。

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By analyzing time and frequency domain response we found out that they have some internal connections with each other, although the test signals are different.

通过频域和时域分析，指出阶跃信号和伪随机信号是一类既有差别又有内在联系的测试信号。

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