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公开(公告)号：US11722851B2
公开(公告)日：2023-08-08
申请号：US17871771
申请日：2022-07-22
Applicant: ZaiNar, Inc.
Inventor： Jonathan Lu , Mainak Chowdhury , Philip A. Kratz
CPC classification number: H04W4/029 , G01S5/021 , G01S5/0284 , G01S5/10 , H04L5/0007 , H04L5/0051 , H04L5/0053 , H04W56/001 , H04W64/00
Abstract: A method for calculating a time-of-arrival of a multicarrier uplink signal includes: accessing a multicarrier reference signal including a subcarrier reference signal for each subcarrier frequency in a set of subcarrier frequencies; receiving the multicarrier uplink signal transmitted from a user device, the multicarrier uplink signal including a subcarrier uplink signal for each subcarrier frequency in the set of subcarrier frequencies; for each subcarrier frequency in the set of subcarrier frequencies, calculating a phase difference, in a set of phase differences, between the subcarrier reference signal for the subcarrier frequency and a subcarrier uplink signal for the subcarrier frequency; calculating a time-of-arrival of the multicarrier uplink signal at the transceiver based on the set of adjusted phase differences; and transmitting the time-of-arrival of the multicarrier uplink signal to a remote server.
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42.发明授权公开(公告)号：US11686805B1
公开(公告)日：2023-06-27
申请号：US17080729
申请日：2020-10-26
Applicant: ZaiNar, Inc.
Inventor： Philip Kratz , Daniel Jacker , Mainak Chowdhury , Alexander Hooshmand
CPC classification number: G01S5/0221 , G01S5/0215 , G01S5/14 , H04W84/18
Abstract: A method including, at each node in each pair of nodes in a network: transmitting an outbound synchronization signal; generating a self-receive signal based on the outbound synchronization signal; detecting the self-receive signal at a self-receive TOA; detecting an inbound synchronization signal; based on the pair of self-receive TOAs and the pair of synchronization TOAs, for each pair of nodes in the network: calculating a pairwise time offset and distance; for each node in the network: based on the set of pairwise distances, calculating a location and a time bias of the node. The method also includes: at each node in the network, detecting a localization signal, transmitted by a device, at a localization TOA; and calculating a location of the device based on, for each node in the network, the localization signal detected at the node, and the time bias and the relative location of the node.
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Patent Agency Ranking
公开(公告)号：US11632226B1
公开(公告)日：2023-04-18
申请号：US17586241
申请日：2022-01-27
Applicant: ZaiNar, Inc.
Inventor： Philip A. Kratz , Daniel M. Jacker , Mainak Chowdhury , Alexander Hooshmand
IPC: H04L7/00 , H04B17/309 , H04B17/21 , H04B17/11
Abstract: A method includes, at a first node: transmitting a first calibration signal at a first time-of-departure measured by the first node; and transmitting a second calibration signal at a second time-of-departure measured by the first node. The method also includes, at a second node: receiving the first calibration signal at a first time-of-arrival measured by the second node; and receiving the second calibration signal at a second time-of-arrival measured by the second node. The method further includes: defining a first calibration point and a second calibration point in a set of calibration points, each calibration point comprising a time-of-departure and a time-of-arrival of each calibration signal; calculating a regression on the set of calibration points; and calculating a frequency offset between the first node and the second node based on the first regression.
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公开(公告)号：US20220369072A1
公开(公告)日：2022-11-17
申请号：US17871771
申请日：2022-07-22
Applicant: ZaiNar, Inc.
Inventor： Jonathan Lu , Mainak Chowdhury , Philip A. Kratz
Abstract: A method for calculating a time-of-arrival of a multicarrier uplink signal includes: accessing a multicarrier reference signal including a subcarrier reference signal for each subcarrier frequency in a set of subcarrier frequencies; receiving the multicarrier uplink signal transmitted from a user device, the multicarrier uplink signal including a subcarrier uplink signal for each subcarrier frequency in the set of subcarrier frequencies; for each subcarrier frequency in the set of subcarrier frequencies, calculating a phase difference, in a set of phase differences, between the subcarrier reference signal for the subcarrier frequency and a subcarrier uplink signal for the subcarrier frequency; calculating a time-of-arrival of the multicarrier uplink signal at the transceiver based on the set of adjusted phase differences; and transmitting the time-of-arrival of the multicarrier uplink signal to a remote server.
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公开(公告)号：US11271713B2
公开(公告)日：2022-03-08
申请号：US17025635
申请日：2020-09-18
Applicant: ZaiNar, Inc.
Inventor： Philip A. Kratz , Mainak Chowdhury , Alexander Hooshmand , Daniel M. Jacker
Abstract: A method includes, at a first node: transmitting a first synchronization signal at a first time according to a first clock of the first node; back-coupling the first synchronization signal to generate a first self-receive signal; calculating a time-of-arrival of the first self-receive signal according to the first clock; and calculating a time-of-arrival of the second synchronization signal according to the first clock. The method also includes, at the second node: transmitting the second synchronization signal at a second time according to a second clock of the second node; back-coupling the second synchronization signal to generate a second self-receive signal; calculating a time-of-arrival of the second self-receive signal according to the second clock; and calculating a time-of-arrival of the first synchronization signal according to the second clock. The method S100 further includes calculating a time bias and a propagation delay between the pair of nodes based on the time-of-arrivals.
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46.发明授权公开(公告)号：US10903915B1
公开(公告)日：2021-01-26
申请号：US16719545
申请日：2019-12-18
Applicant: ZaiNar, Inc.
Inventor： Philip Kratz , Mainak Chowdhury
Abstract: A system for generating a self-receive signal including: a signal generator; a signal processor including an analog-to-digital converter; and an antenna. The system also includes a passive coupling device including: an antenna port electromagnetically coupled to the antenna; a transmit port electromagnetically coupled to the signal generator; and a receive port electromagnetically coupled to the signal processor. The system additionally includes an impedance matching network: electromagnetically interposed between the antenna port and the antenna; and configured to shift an impedance of the antenna to a load impedance different from a characteristic impedance of the passive coupling device. The antenna and the passive coupling device of the system cooperate to reflect the signal, transmitted via the transmit port, toward the receive port at a receive voltage between the input noise floor and the input saturation voltage according to a reflection coefficient based on the load impedance and the characteristic impedance.
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公开(公告)号：US20210006389A1
公开(公告)日：2021-01-07
申请号：US17025635
申请日：2020-09-18
Applicant: ZaiNar, Inc.
Inventor： Philip A. Kratz , Mainak Chowdhury , Alexander Hooshmand , Daniel M. Jacker
Abstract: A method includes, at a first node: transmitting a first synchronization signal at a first time according to a first clock of the first node; back-coupling the first synchronization signal to generate a first self-receive signal; calculating a time-of-arrival of the first self-receive signal according to the first clock; and calculating a time-of-arrival of the second synchronization signal according to the first clock. The method also includes, at the second node: transmitting the second synchronization signal at a second time according to a second clock of the second node; back-coupling the second synchronization signal to generate a second self-receive signal; calculating a time-of-arrival of the second self-receive signal according to the second clock; and calculating a time-of-arrival of the first synchronization signal according to the second clock. The method S100 further includes calculating a time bias and a propagation delay between the pair of nodes based on the time-of-arrivals.
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