FFT vs Goertzel for cycle detection. Two algorithms that return the same answer, but fit trading data very differently. The Fast Fourier Transform computes the entire frequency spectrum in O(N log N).

Abstract: The Goertzel algorithm is fairly known algorithm in tone detection systems. This effective realization of a partial Fourier transform is able to evaluate selected spectral bin by a very ...

A short demo program Kevin Banks wrote to enable you to test-drive the Goertzel algorithm. This is Listing 1 in Kevin Banks' “The Goertzel Algorithm,” first printed in September 2002 issue of Embedded ...

If you’ve ever wondered about the best way to detect dial and DTMF tones from a phone line, [Debraj] is your man. [Debraj] built a DTMF detector using the Goertzel algorithm. Normally, when we think ...

Abstract: Fluxgate current sensors are extensively applied in smart grids and electric vehicles, yet enhancing residual current detection accuracy and complex waveform recognition remain significant ...

A reusable FPGA measurement-path IP for coherent single-frequency I/Q extraction using Q17 fixed-point Goertzel algorithm, with comprehensive verification, AXI-Stream integration, and phase-correction ...

Everyone’s a critic, but it’s hard to argue with success. And that’s exactly what [agp.cooper] has with his ATtiny85-based spectrum analyzer devices. The “normal” way to build a spectrum analyzer is ...