Interpolation and harmonics

1. What is harmonic interpolation?
2. What is interpolation in signal processing?
3. What is interpolation in sampling?
4. What are harmonics in FFT?

What is harmonic interpolation?

A harmonic interpolation of a polygon (for odd and even numbers of points forming the poly- gon) used in computer graphics is derived from the primary permutation matrix using the spectral decomposition of the matrix. This is a technique to draw closed curves. We compare these curves with Bézier curves.

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.

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).

What are harmonics in FFT?

Chapter 11: Fourier Transform Pairs. Harmonics. If a signal is periodic with frequency f, the only frequencies composing the signal are integer multiples of f, i.e., f, 2f, 3f, 4f, etc. These frequencies are called harmonics.