Multi-source aliasing distributed optical fiber vibration sensing signal separation method

The invention discloses a multi-source aliasing distributed optical fiber vibration sensing signal separation method, which belongs to the field of optical fiber sensing technology and application, and comprises the following steps of: acquiring a space-time matrix signal based on a distributed optical fiber vibration sensing system, detecting a difference value, positioning a vibration source, and extracting a plurality of paths of time signals closest to the vibration source as observation signals; preprocessing by mean value removal and whitening; adopting a FastICA algorithm based on kurtosis for demixing, selecting the absolute value of kurtosis as a target function, finding the direction where the absolute value of kurtosis is increased fastest through the gradient descent thought, obtaining an optimal demixing matrix, and then seperating source signals from multi-source aliasing signals. According to the invention, a separation method for solving the problem of mixing of a plurality of dynamic vibratio