公开(公告)号：US20240302518A1

公开(公告)日：2024-09-12

申请号：US18668076

申请日：2024-05-17

Applicant: Apple Inc.

Inventor： Benjamin A. Werner ,  Merrick K. McCracken ,  Wobert W. Brumley

IPC: G01S13/46 ,  G01S5/02 ,  G01S5/10 ,  H04W64/00

CPC classification number: G01S13/46 ,  G01S5/0252 ,  G01S5/0289 ,  G01S5/10 ,  H04W64/006 ,  G01S5/0218 ,  G01S2013/468

Abstract: A mobile device may receive a plurality of timestamps, wherein the plurality of timestamps indicate sending and receiving time for ranging packets and response packets. The mobile device may calculate a responder turn-around time as a first difference between the second time and the first time. The mobile device may calculate a responding round trip time as a second difference between the second time and the third time. The mobile device may receive from the electronic device an initiator turn-around time and an initiator round trip time. The mobile device may calculate a frequency offset for the wireless protocol using the responder turn-around time, the responding round trip time, the initiator turn-around time, and the initiator round trip time. The mobile device may compare an observed frequency offset to the calculated frequency offset to determine a frequency offset difference and whether it exceeds a threshold, adjusting a ranging measurement.