What is decimation in digital signal processing?
>Decimation (Digital Filter Design Toolkit) 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.
What is the process of decimation?
Decimation is a term that historically means the removal of every tenth one. But in signal processing, decimation by a factor of 10 actually means keeping only every tenth sample. This factor multiplies the sampling interval or, equivalently, divides the sampling rate.
What is decimation and interpolation in DSP?
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.
What is the function of decimation?
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.
What is the difference between decimation and interpolation?
Interpolation is the exact opposite of decimation. It is an information preserving operation, in that all samples of x[n] are present in the expanded signal y[n]. The mathematical definition of L-fold interpolation is defined by Equation 9. 2 and the block diagram notation is depicted in Figure 9.3.
How do you implement a decimation filter?
Decimation consists of the processes of lowpass filtering, followed by downsampling. To implement the filtering part, you can use either FIR or IIR filters. To implement the downsampling part (by a downsampling factor of “M”) simply keep every Mth sample, and throw away the M-1 samples in between.
What is Decimation in time FFT?
Decimation is the process of breaking down something into it’s constituent parts. Decimation in time involves breaking down a signal in the time domain into smaller signals, each of which is easier to handle.
What is decimation in time domain?
Decimation in time involves breaking down a signal in the time domain into smaller signals, each of which is easier to handle. If the input (time domain) signal, of N points, is x(n) then the frequency response X(k) can be calculated by using the DFT.