Downsampling

Time downsampling vs. frequency downsampling [closed]

Time downsampling vs. frequency downsampling [closed]
  1. What does downsampling do to frequency domain?
  2. Does downsampling increase frequency?
  3. What is downsampling in time series?

What does downsampling do to frequency domain?

There are two important points to take away about downsampling's effects in the frequency domain: The downsampled signal's frequency spectrum will have its magnitude lowered by the downsampling factor $ D $, and will repeat every $ 2\pi $ Downsampling can cause aliasing.

Does downsampling increase frequency?

To answer the OP's question, downsampling alone does NOT change the frequency resolution. The simple answer is that the frequency resolution is determined from the total time duration of the data (this applies universally whether we are in the analog or frequency domain).

What is downsampling in time series?

Downsampling reduces the sampling rate of the input AOs by an integer factor, which can be very useful for example to reduce data load. The downsample method takes the following parameters: Key.

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