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公开(公告)号：US20180249344A1
公开(公告)日：2018-08-30
申请号：US15964057
申请日：2018-04-26
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
CPC classification number: H04W16/20 , H04W4/02 , H04W56/001 , H04W64/00
Abstract: Positioning determination of a communication device in a wireless communication network is supported by a positioning device receiving [230] tight synchronization signals from a master positioning cell; determining [232] therefrom a plurality of time differences between their actual and theoretical times of arrival; synchronizing [234] a positioning cell clock based on the received tight synchronization signals adjusted by the time differences; and emitting [236] to the communication device a positioning signal at a time determined by the synchronization. The positioning signal includes an identifier of the positioning cell, and it is transmitted so as not to interfere with positioning pilot signals transmitted by the wireless communication network. The positioning device may alternatively receive synchronization signals from another positioning cell instead of a master positioning cell.
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公开(公告)号：US20220373638A1
公开(公告)日：2022-11-24
申请号：US17769815
申请日：2020-10-28
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh , Mazen Neifer , Ines Ben Hamida , Ganda Ouedraogo
Abstract: A method for location determination in a wireless communications system solves a minimization problem using estimated time-of-arrivals (TOAs) of reference signals [108, 110, 112] received by a receiving node [100] from transmitting nodes [102, 104, 106] and predetermined locations of the transmitting nodes, to produce an estimate of unknown receiving node location and/or an estimate of an unknown time of transmission (t) of the reference signals. The minimization problem is defined in terms of a theoretical system model of time-of-arrivals (TOAs), linearized globally as a function of the unknown receiving node location, the unknown time of transmission (t) of the reference signals, and an additional intermediate variable (u) that defines a non-linear quadratic constraint over position coordinates of the unknown receiving node location and the time of transmission (t) of the reference signals, wherein the minimization problem optimizes the additional intermediate variable (u). The method may also be implemented with the roles of transmitters and receivers interchanged.
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公开(公告)号：US09961559B2
公开(公告)日：2018-05-01
申请号：US15723076
申请日：2017-10-02
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
CPC classification number: H04W16/20 , H04W4/043 , H04W56/001 , H04W64/00
Abstract: Positioning determination of a communication device in a wireless communication network is supported by a positioning device receiving [230] tight synchronization signals from a master positioning cell; determining [232] therefrom a plurality of time differences between their actual and theoretical times of arrival; synchronizing [234] a positioning cell clock based on the received tight synchronization signals adjusted by the time differences; and emitting [236] to the communication device a positioning signal at a time determined by the synchronization. The positioning signal includes an identifier of the positioning cell, and it is transmitted so as not to interfere with positioning pilot signals transmitted by the wireless communication network. The positioning device may alternatively receive synchronization signals from another positioning cell instead of a master positioning cell.
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公开(公告)号：US11522576B2
公开(公告)日：2022-12-06
申请号：US16952982
申请日：2020-11-19
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: H04L27/26 , G01S1/02 , H04B1/717 , H04B1/7093
Abstract: A method for estimating a time of arrival of a signal transmitted over a wireless channel, includes receiving the signal by a receiving device; correlating the received signal with a filtered code sequence to create a correlation output, identifying in the correlation output, an observation window associated with a main lobe in the correlation output; and processing the observation window to determine a time of arrival of a first path component in the received signal. The filtered code sequence is formed by incorporating a time of arrival matched filter (TOA-MF) inside predetermined shaped code sequence. The TOA-MF is matched to the predetermined shaped code sequence and is based upon a power delay profile of the wireless channel. The predetermined shaped code sequence is a convolution of a predetermined shaping sequence and a predetermined code sequence.
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公开(公告)号：US10539652B2
公开(公告)日：2020-01-21
申请号：US16027785
申请日：2018-07-05
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: G01S5/06 , G01S5/02 , G01S11/02 , H04B17/336 , H04L27/26
Abstract: A technique is provided for estimating time of arrival of a signal transmitted as a pulse and received as a sum of pulses. The received signal is filtered with a novel filter that lowers the early side lobes of the received signal to noise level. A first energy rise point is identified at a point of the main lobe of the filtered received signal, at which the energy is higher than the noise by a predetermined level. Starting from the identification of the first energy rise points, the time of arrival is estimated via curve matching, in which the shape of the filtered received signal is matched to the shape of a reference curve composed by a sum of one or more reference curves that are shifted both in time and in energy. The reference curves are found by applying to the transmitted signal the same filter applied to the received signal.
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Patent Agency Ranking
公开(公告)号：US20180027421A1
公开(公告)日：2018-01-25
申请号：US15723076
申请日：2017-10-02
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
CPC classification number: H04W16/20 , H04W4/043 , H04W56/001 , H04W64/00
Abstract: Positioning determination of a communication device in a wireless communication network is supported by a positioning device receiving [230] tight synchronization signals from a master positioning cell; determining [232] therefrom a plurality of time differences between their actual and theoretical times of arrival; synchronizing [234] a positioning cell clock based on the received tight synchronization signals adjusted by the time differences; and emitting [236] to the communication device a positioning signal at a time determined by the synchronization. The positioning signal includes an identifier of the positioning cell, and it is transmitted so as not to interfere with positioning pilot signals transmitted by the wireless communication network. The positioning device may alternatively receive synchronization signals from another positioning cell instead of a master positioning cell.
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公开(公告)号：US11079467B2
公开(公告)日：2021-08-03
申请号：US16699954
申请日：2019-12-02
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: G01S5/06 , G01S5/02 , G01S11/02 , H04B17/336 , H04L27/26
Abstract: A technique is provided for estimating time of arrival of a signal transmitted as a pulse and received as a sum of pulses. The received signal is filtered with a novel filter that lowers the early side lobes of the received signal to noise level. A first energy rise point is identified at a point of the main lobe of the filtered received signal, at which the energy is higher than the noise by a predetermined level. Starting from the identification of the first energy rise points, the time of arrival is estimated via curve matching, in which the shape of the filtered received signal is matched to the shape of a reference curve composed by a sum of one or more reference curves that are shifted both in time and in energy. The reference curves are found by applying to the transmitted signal the same filter applied to the received signal.
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公开(公告)号：US10397801B2
公开(公告)日：2019-08-27
申请号：US16278269
申请日：2019-02-18
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
Abstract: Positioning determination of a communication device in a wireless communication network is supported by a positioning device receiving [230] tight synchronization signals from a master positioning cell; determining [232] therefrom a plurality of time differences between their actual and theoretical times of arrival; synchronizing [234] a positioning cell clock based on the received tight synchronization signals adjusted by the time differences; and emitting [236] to the communication device a positioning signal at a time determined by the synchronization. The positioning signal includes an identifier of the positioning cell, and it is transmitted so as not to interfere with positioning pilot signals transmitted by the wireless communication network. The positioning device may alternatively receive synchronization signals from another positioning cell instead of a master positioning cell.
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公开(公告)号：US20180313930A1
公开(公告)日：2018-11-01
申请号：US16027785
申请日：2018-07-05
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: G01S5/06 , H04L27/26 , G01S5/02 , G01S11/02 , H04B17/336
CPC classification number: G01S5/06 , G01S5/0215 , G01S5/0221 , G01S5/0252 , G01S11/02 , H04B17/336 , H04L27/2628
Abstract: A technique is provided for estimating time of arrival of a signal transmitted as a pulse and received as a sum of pulses. The received signal is filtered with a novel filter that lowers the early side lobes of the received signal to noise level. A first energy rise point is identified at a point of the main lobe of the filtered received signal, at which the energy is higher than the noise by a predetermined level. Starting from the identification of the first energy rise points, the time of arrival is estimated via curve matching, in which the shape of the filtered received signal is matched to the shape of a reference curve composed by a sum of one or more reference curves that are shifted both in time and in energy. The reference curves are found by applying to the transmitted signal the same filter applied to the received signal.
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公开(公告)号：US20230081564A1
公开(公告)日：2023-03-16
申请号：US17987839
申请日：2022-11-15
Applicant: Nestwave SAS
Inventor： Rabih Chrabieh
IPC: G01S5/02
Abstract: A method for estimating a time of arrival of a signal transmitted over a wireless channel, includes receiving the signal by a receiving device to produce a received signal; filtering by a filter either the received signal or a code sequence, wherein the filter is designed to produce a correlation output that is near causal; correlating the received signal with the code sequence to create the correlation output that is near causal; wherein near causal means that early side lobes and an early part of a main lobe of the correlation output are sufficiently suppressed in order to substantially reduce an impact of delayed multipath onto a first path component in the received signal, wherein the first path is in an operating region; identifying in the correlation output, an observation window associated with a main lobe in the correlation output; processing the observation window to determine a time of arrival of the first path component in the received signal.
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