Interpolation

Decimation and interpolation

Decimation and interpolation
  1. What is difference between interpolation and decimation?
  2. What is interpolation in sampling?
  3. Is decimation and interpolation linear?
  4. What is interpolation in signal processing?

What is 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.

What is interpolation in sampling?

In the domain of digital signal processing, the term interpolation refers to the process of converting a sampled digital signal (such as a sampled audio signal) to that of a higher sampling rate (Upsampling) using various digital filtering techniques (for example, convolution with a frequency-limited impulse signal).

Is decimation and interpolation linear?

From a digital signal processing point of view, both the pro- cesses of interpolation and decimation can be well formulated in terms of linear filtering operations.

What is interpolation in signal processing?

Interpolation is the process of increasing the sampling frequency of a signal to a higher sampling frequency that differs from the original frequency by an integer value. Interpolation also is known as up-sampling.

Why does OFDM need cyclic prefix?
Cyclic prefix is inserted to avoid intersymbol interference due to the multipath channel. In practice, CP-OFDM modulator is implemented via the comput...
What's the meaning of negative frequencies after taking the FFT in practice?
Why are there negative frequencies in FFT?What does it mean when frequency is negative?What do negative values in FFT mean?What does negative Fourier...
Efficient CIC Decimation Filter in C
What is CIC decimation?How does a CIC filter work?Why low pass filter is used in decimation?Which filter is used in decimation and interpolation? Wh...