Howtosignalprocessing
- What is the relationship between impulse response and frequency response?
- Can impulse response make the frequency response?
- What is zero phase frequency response?
What is the relationship between impulse response and frequency response?
The relationship between the impulse response and the frequency response is one of the foundations of signal processing: A system's frequency response is the Fourier Transform of its impulse response.
Can impulse response make the frequency response?
The impulse response is the response of a system to a single pulse of infinitely small duration and unit energy (a Dirac pulse). The frequency response shows how much each frequency is attenuated or amplified by the system. The frequency response of a system is the impulse response transformed to the frequency domain.
What is zero phase frequency response?
A filter has a zero-phase response if its frequency response is real-valued. A zero-phase filter must have an odd-number of samples in its support with the origin at the center. If the filter has real coefficients, then the impulse response must be symmetric about the origin, i.e. h(n) = h(-n).
