Howtosignalprocessing
- What is the importance of decimation for a given signal sequence?
- What is the difference between decimation and downsampling?
- What is decimating FIR filter?
- What is decimation used for?
What is the importance of decimation for a given signal sequence?
The decimation accomplishes a reduction of the sampling rate by a factor of a given signal after this signal passes through an. The subsampler is represented in Fig. 3.1 by a circle containing the integer number and a downward arrow.
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.
What is decimating FIR filter?
The FIR filter filters the data in each channel of the input using a direct-form FIR filter. The downsampler that follows downsamples each channel of filtered data by taking every M-th sample and discarding the M – 1 samples that follow. M is the value of the decimation factor that you specify.
What is decimation used for?
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.
