公开(公告)号：US20210282035A1

公开(公告)日：2021-09-09

申请号：US17110565

申请日：2020-12-03

Applicant: QUALCOMM Incorporated

Inventor： Paul Dominic HISCOCK ,  Robin HEYDON ,  Thomas ALLAN ,  Nicolas GRAUBE

IPC: H04W24/08 ,  G06Q30/02 ,  G06Q10/08 ,  G06K7/10 ,  H04B17/318

Abstract: According to various aspects and techniques to enable methods and systems for a first communication device to determine an approximate number of other communication devices that have lost contact with a host communication device. This includes determining a common future time window using a last known global time stamp and determining a transmit time within the common future time window. This also includes receiving samples that are captured during the common future time window on a predefined communication channel, as well as analyzing the received samples to estimate the total number of other communication devices.

公开(公告)号：US20210160001A1

公开(公告)日：2021-05-27

申请号：US16696804

申请日：2019-11-26

Applicant: QUALCOMM Incorporated

Inventor： Paul Dominic HISCOCK ,  Thomas ALLAN

IPC: H04L1/00 ,  H04W72/04 ,  H04W28/04 ,  H04L27/26

Abstract: Methods, systems, and devices for tampering detection in phase based ranging are described.
A device may engage in two-tone phase based ranging. For example, the device may transmit a composite signal that includes a first carrier at a first frequency and a second carrier at a second frequency. The device may receive a third carrier at the first frequency and measure its phase. The device may determine a phase sum associated with the first frequency based on the measured phase of the third carrier and a measured phase of the first carrier. The device may compare the phase sum with a reference value and determine whether tampering with the phase based ranging has occurred based on the comparison.

公开(公告)号：US20210124061A1

公开(公告)日：2021-04-29

申请号：US16667515

申请日：2019-10-29

Applicant: QUALCOMM Incorporated

Inventor： Paul Dominic HISCOCK ,  Thomas ALLAN

IPC: G01S19/44 ,  G01S19/04 ,  G01S13/84 ,  H04W4/02 ,  H04W4/80

Abstract: Secure range estimates as described herein may include determining a range estimate between two Bluetooth enabled devices based, at least in part, on round trip phase measurements of wireless signals transmitted between the devices. In one example, a range estimate may include determining a first set of relative carrier measurements at a first set of frequencies, determining a second set of relative carrier measurements based on the first set at the second set of frequencies; and combining the first set and the second set to estimate a distance between the devices.

公开(公告)号：US20230118013A1

公开(公告)日：2023-04-20

申请号：US17451150

申请日：2021-10-15

Applicant: QUALCOMM Incorporated

Inventor： Paul Dominic HISCOCK ,  Murray JARVIS ,  Nicolas GRAUBE ,  Mafalda Pereira VARELA ,  Thomas ALLAN

IPC: G01R31/08 ,  G01R19/165 ,  G01S13/88

Abstract: Various embodiments may provide systems and methods for determining a distance to a short in a two-conductor wire. Various embodiments may include determining a distance to a short in a two-conductor wire based at least in part on a phase difference between a phase of an injected tone and a phase of a reflected tone. Various embodiments may include determining a distance to a short in a two-conductor wire based at least in part on both a phase difference and an amplitude difference between an injected tone and a reflected tone. Various embodiments may include determining a distance to a short in a two-conductor wire based at least in part on a measured peak voltage of a combined pulse.

公开(公告)号：US20200092893A1

公开(公告)日：2020-03-19

申请号：US16133478

申请日：2018-09-17

Applicant: QUALCOMM Incorporated

Inventor： Thomas ALLAN ,  Paul Dominic HISCOCK

IPC: H04W72/08 ,  H04W72/04

Abstract: The present disclosure provides a frequency hopping technique that may remove the effects of radial motion while making phase measurements (e.g., RTP measurements) by taking symmetric samples/RTP measurements of a signal transmitted and received for a set of carrier frequencies around the center time of an RTP measurement campaign.