|Methods as the ECG, IPG, PPG or blood-pressure as sensors for heart rate measurements were compared while in motion. We aimed to develop a novel approach for an alternative heart-rate-monitor including a software algorithm for suppressing interfering signals. PPG-sensor showed good properties and a low SNR in motion. By using transfer functions between 2 sensor-signals an algorithm to extract the origin pulse signal from a strongly disturbed pulse signal was developed. It was possible to estimate the original form of the PPG-signal during movements like head shaking.