Signal arrival time estimation method based on envelope amplitude judgment, medium and device

The invention provides a signal arrival time estimation method based on envelope amplitude judgment, a medium and a device. The method comprises the following steps: detecting a frequency domain, and outputting signal guide frequency and time domain width protection information; performing narrowband filtering on the original data of the frame where the pulse front edge is located; extracting an amplitude envelope from the frame data after narrowband filtering; searching an amplitude maximum value in the amplitude envelope; determining a TOA amplitude detection threshold; according to a TOA amplitude detection threshold, starting from an amplitude maximum value time point position, searching a first possible TOA detection point in an inverted sequence, and setting the first possible TOA detection point as an initial value of a TOA estimation position; a next possible TOA detection point is searched in an inverted sequence; judgment is carried out according to an envelope amplitude accumulated value; and TOA c