Upsampling in the frequency domain

1. What is the effect of upsampling in the frequency domain?
2. Does upsampling change frequency?
3. What is upsampling in frequency domain in Matlab?
4. What is upsampling in signal?

What is the effect of upsampling in the frequency domain?

Upsampling adds to the original signal undesired spectral images which are centered on multiples of the original sampling rate. In Frequency domain , Upsampling means the padding of zeros at the last of max frequency components on all sides of the signal.

Does upsampling change frequency?

Upsampling by a factor of inserts zeros between every two samples of a discrete-time sequence. This expansion in time causes a contraction in frequency and the appearance of spurious spectral components, necessitating filtering after upsampling.

What is upsampling in frequency domain in Matlab?

In Frequency domain, upsampling means nothing but the padding of zeros at the end of high frequency components on both sides of the signal.

What is upsampling in signal?

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.