Preamble detection method and device for same

The invention discloses a preamble detection method and a device for the same, which are used for avoiding the problem of preamble virtual detection, even omission, caused by non-ideal time delay in the prior art. The preamble detection method provided by the invention comprises the following steps of: presetting a certain number of sampling points in advance according to a time-frequency position of a PRACH (Physical Random Access Channel), and extracting time-domain data of the PRACH; based on the time-domain data of the PRACH, judging whether a correlation peak meeting the preset conditions exists in each detection window corresponding to the preamble_id; and for the detection window which contains the correlation peak meeting the preset conditions, determining the preamble_id and the timing advance (TA) corresponding to the detection window.