公开(公告)号：US10742469B2

公开(公告)日：2020-08-11

申请号：US16038163

申请日：2018-07-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Tao Ouyang ,  Syed Habib Rahman ,  Xiaoshu Si ,  Fan Wang ,  Hao Lei

IPC: H04L27/26 ,  H04L7/00 ,  H04W56/00

Abstract: A method and an apparatus for determining a time offset are disclosed. The method includes: obtaining, by a device at a head end, a time-domain signal based on a received signal; and then determining a time offset based on values of peak-to-average ratios of a preset quantity of symbols starting from a qth symbol in the time-domain signal, where a peak-to-average ratio of the qth symbol is greater than a preset threshold. A new method for determining a time offset is provided, and takes advantages that the time-domain signal obtained by the device at the head end has stronger capabilities of resisting interference such as frequency offset and phase noise. The method for determining a time offset can be applied both to initial ranging and periodic ranging.