Method and device for acquiring target motion signal and pilot frequency sound equipment

The invention provides a method and device for acquiring a target physiological movement signal and pilot frequency sound equipment. The method comprises the following steps: acquiring multi-channel complex signals received by a plurality of channels; and obtaining at least one interference-removed target motion complex signal from the multi-channel complex signal by using the motion signal synthesis vector corresponding to the at least one target motion signal. The method comprises the following steps: acquiring data received by a plurality of channels in a set time period, including data without external interference in a first set sub-time period and data with external interference in a second set sub-time period; obtaining an external interference suppression matrix based on the data, and obtaining data for suppressing external interference based on the data without external interference or the data with external interference and the external interference suppression matrix; based on the frequency range o