Howtosignalprocessing
- How do you decimate a signal in Matlab?
- How do you calculate decimation?
- What is the difference between interpolation and decimation?
- Why decimate a signal?
How do you decimate a signal in Matlab?
y = decimate( x , r ) reduces the sample rate of x , the input signal, by a factor of r . The decimated vector, y , is shortened by a factor of r so that length(y) = ceil(length(x)/r) .
How do you calculate decimation?
2 What is the “decimation factor”? The decimation factor is simply the ratio of the input rate to the output rate. It is usually symbolized by “M”, so input rate / output rate=M. Tip: You can remember that “M” is the symbol for decimation factor by thinking of “deci-M-ation”.
What is the difference between interpolation and decimation?
Decimation and interpolation are the two basic building blocks in the multirate digital signal processing systems. The decimator is utilized to decrease the sampling rate and interpolator to increase the sampling rate.
Why decimate a signal?
Decimation is useful in applications in which the Nyquist frequency of a signal is much higher than the highest frequency of the signal. Decimation filters help you remove the excess bandwidth and reduce the sampling frequency of the signal.
