Matlab decimate

1. What is decimate in Matlab?
2. Why we use decimate?
3. Is decimation same as down sampling?
4. Why decimate a signal?

What is decimate in Matlab?

Decimation reduces the original sample rate of a sequence to a lower rate. It is the opposite of interpolation. decimate lowpass filters the input to guard against aliasing and downsamples the result. The function uses decimation algorithms 8.2 and 8.3 from [1].

Why we use decimate?

to kill a large number of something, or to reduce something severely: Populations of endangered animals have been decimated.

Is decimation same as down sampling?

Decimation is the process of reducing the sampling frequency of a signal to a lower sampling frequency that differs from the original frequency by an integer value. Decimation also is known as down-sampling.

Why decimate a signal?

The most immediate reason to decimate is simply to reduce the sampling rate at the output of one system so a system operating at a lower sampling rate can input the signal.