NOISE SUPPRESSION IN MEASUREMENT OF A REPETITIVE SIGNAL

摘要

The method of suppressing noise in a signal from a device or from a living being captures a plurality of signals from the device or from the living being, where each of the captured signals is in a fixed temporal relationship to a synchronising signal. The synchronising signal can be derived from the device, eg a vibration signal, or from the living being, eg an ECG signal. Alternatively, the method uses a test signal with a repeated sequence which is supplied to the device under test. A signal is captured from the device representing the response of the device to the test signal. Characteristic parameters such as transient characteristics are derived from the captured signal, and a maximum value of the characteristic parameters is determined for each repeated response to the repeated sequence in the test signal. A minimum value is determined among the maximum values of the characteristic parameters. This method gives a fast convergence.