Editor's Picks

A Simpler Goertzel Algorithm

Rick Lyon's Blog on DSPRelated -

In this blog I propose a Goertzel algorithm that is simpler than the version of the Goertzel algorithm that is traditionally presented DSP textbooks. Below I very briefly describe the DSP textbook version of the Goertzel algorithm followed by a description of my proposed simpler algorithm.

The Traditional DSP Textbook Goertzel Algorithm

The so-called Goertzel algorithm is used to...

60-Hz Noise and Baseline Drift Reduction in ECG Signal Processing

Rick Lyon's Blog on DSPRelated -

Electrocardiogram (ECG) signals are obtained by monitoring the electrical activity of the human heart for medical diagnostic purposes [1]. This blog describes a very efficient digital filter used to reduce both 60 Hz AC power line noise and unwanted signal baseline drift that often contaminate ECG signals.

We'll first describe the ECG noise reduction filter and then examine the filter's...

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