Invention Grant
- Patent Title: Waveform design for wi-fi time-of-flight estimation
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Application No.: US16041874Application Date: 2018-07-23
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Publication No.: US10345435B2Publication Date: 2019-07-09
- Inventor: Syed Aon Mujtaba , Xiaowen Wang
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Jeffrey C. Hood; Matthew C. Washburn
- Main IPC: H04W24/00
- IPC: H04W24/00 ; G01S7/486 ; H04W4/02 ; H04L27/18 ; G01S11/02 ; G01S11/08 ; H04L27/00 ; H04L27/26 ; G01S5/14 ; G01S17/10 ; H04L1/00 ; H04L27/34 ; H04W64/00

Abstract:
Some embodiments relate to a waveform design for time-of-flight estimation in a wireless communication system. The waveform may include a number N of signal tones, wherein the number N of signal tones is greater than a number M of signal tones that the receiving wireless device is configured to decode. Upon receipt of the waveform, the receiving wireless device may store a timestamp which indicates a time of receipt of the waveform. The receiving wireless device may decode M of the N signal tones. For example, the receiving wireless device may decode the middle M signal tones of the N signal tones. One or more of the transmitting or receiving wireless devices may then estimate a distance between them based at least in part on the timestamp.
Public/Granted literature
- US20180364338A1 Waveform Design for Wi-Fi Time-of-Flight Estimation Public/Granted day:2018-12-20
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