2. Time domain analysis represents the relationship between dynamic signals with time axis as coordinates, while frequency domain analysis represents signals with frequency axis as coordinates.
3. The representation of time domain analysis is more vivid and intuitive, while frequency domain analysis is more concise, and it is more profound and convenient to analyze problems.
4. The trend of signal analysis is from time domain to frequency domain. At the same time, time domain analysis and frequency domain analysis are interrelated, indispensable and complementary.