Howtosignalprocessing
- How do you measure the delay of a signal?
- How does upsampling work?
- How do you upsample a signal in Matlab?
- What is the difference between decimation and downsampling?
How do you measure the delay of a signal?
τdelay=argmax ((f∗g)(t)), this will estimate the time offset where the signals are best aligned.
How does upsampling work?
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.
How do you upsample a signal in Matlab?
y = upsample( x , n ) increases the sample rate of x by inserting n – 1 zeros between samples. If x is a matrix, the function treats each column as a separate sequence. y = upsample( x , n , phase ) specifies the number of samples by which to offset the upsampled sequence.
What is the difference between decimation and downsampling?
Loosely speaking, “decimation” is the process of reducing the sampling rate. In practice, this usually implies lowpass-filtering a signal, then throwing away some of its samples. “Downsampling” is a more specific term which refers to just the process of throwing away samples, without the lowpass filtering operation.
