Howtosignalprocessing
- How does Goertzel algorithm work?
- How does Goertzel algorithm gives DFT?
- Why Goertzel algorithm is used?
How does Goertzel algorithm work?
Like the DFT, the Goertzel algorithm analyses one selectable frequency component from a discrete signal. Unlike direct DFT calculations, the Goertzel algorithm applies a single real-valued coefficient at each iteration, using real-valued arithmetic for real-valued input sequences.
How does Goertzel algorithm gives DFT?
Goertzel's algorithm is another methods that calculates the DFT by converting it into a digital filtering problem. The method looks at the calculation of the DFT as the evaluation of a polynomial on the unit circle in the complex plane.
Why Goertzel algorithm is used?
The Goertzel algorithm is typically used for frequency detection in the telephone tone dialing (dual-tone multi-frequency, DTMF), where the meaning of the signaling is determined by two out of a total of eight frequencies being simultaneously present [5].
