Howtosignalprocessing
- Is resampling the same as upsampling?
- Is it possible to Upsample the signal?
- What happens when you Upsample?
- What is difference between upsampling & interpolation?
Is resampling the same as upsampling?
Resampling involves changing the frequency of your time series observations. Two types of resampling are: Upsampling: Where you increase the frequency of the samples, such as from minutes to seconds. Downsampling: Where you decrease the frequency of the samples, such as from days to months.
Is it possible to Upsample the signal?
Upsampling is the process of inserting zero-valued samples between the original samples of a signal to increase the sampling rate. One way to accomplish upsampling by an integer ratio of 1:D is to interpose D-1 zero samples between each pair of the input samples of the signal.
What happens when you Upsample?
Upsampling is the process of inserting zero-valued samples between original samples to increase the sampling rate. (This is sometimes called “zero-stuffing”.) This kind of upsampling adds undesired spectral images to the original signal, which are centered on multiples of the original sampling rate.
What is difference between upsampling & interpolation?
Upsampling adds to the original signal undesired spectral images which are centered on multiples of the original sampling rate. “Interpolation”, in the DSP sense, is the process of upsampling followed by filtering. (The filtering removes the undesired spectral images.)
