Howtosignalprocessing
- What is an interpolation filter?
- What is interpolation in sampling?
- Is interpolation a low pass filter?
- What is interpolation and decimation filters and why we need it?
What is an interpolation filter?
The interpolation filter contains an L-fold expander followed by a lowpass FIR filter H(z). The L-fold expander inserts L−1 zeroes between consecutive samples to the original signal x(n) and changes the sampling frequency fs of the original signal x(n) to a new sampling frequency Lfs.
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 interpolation a low pass filter?
Interpolation is a two step process: upsampling followed by low pass filtering.
What is interpolation and decimation filters and why we need it?
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.
