公开(公告)号：US20250052911A1

公开(公告)日：2025-02-13

申请号：US18796444

申请日：2024-08-07

Applicant: u-blox AG

Inventor： Ian Sheret ,  Hayden Dorahy ,  Olivier Julien ,  Christopher Hide

IPC: G01S19/23 ,  G01S19/24 ,  H01Q1/24

Abstract: A GNSS receiver and a method of processing GNSS measurements are disclosed. The method includes defining (220) a state vector, comprising state variables. It further includes obtaining (230) a posterior probability density for the state vector. State information is inferred based on the posterior probability density. This inferring involves integrating the posterior probability density. The integrating comprises dividing (234) a domain of the posterior probability density into a plurality of slices along a dimension associated with one of the state variables; integrating (236) each slice separately, to produce a respective integration result for each slice; and combining (238) the integration results for the slices.

公开(公告)号：US20240364311A1

公开(公告)日：2024-10-31

申请号：US18641111

申请日：2024-04-19

Applicant: u-blox AG

Inventor： Olivier Julien

IPC: H03H11/04 ,  H03K5/00 ,  H03K5/01 ,  H04B1/10

CPC classification number: H03H11/04 ,  H04B1/10 ,  H03H2011/0488 ,  H03K2005/00078 ,  H03K5/01

Abstract: In one embodiment a tracking circuit for tracking a frequency of a sweeping signal component in an input signal comprises an input (9) for receiving the input signal (Sin) comprising the sweeping signal component and a noise component, a mixer (10) coupled to the input and configured to mix the input signal (Sin) with a replica signal (Srep) and therefrom provide a residual input signal (Sinr), a low-pass filter (20) coupled downstream of the mixer (10), a discriminator circuit (30) coupled downstream of the low-pass filter (20), a loop filter (40) coupled downstream of the discriminator circuit (30) and configured to provide a frequency control value (Sfc), and a replica signal generator circuit (50) coupled downstream of the loop filter (40) and configured to provide the replica signal (Srep) with a frequency adjusted based on the frequency control value (Sfc), wherein the frequency of the replica signal (Srep) represents an estimation of a frequency of the sweeping signal component propagated to a current time unit of the input signal (Sin).

公开(公告)号：US20240259991A1

公开(公告)日：2024-08-01

申请号：US18422430

申请日：2024-01-25

Applicant: u-blox AG

Inventor： Davide Lenzarini ,  Peter Karlsson ,  Bruce Jackson ,  Hariharasudhan Vigneswaran

IPC: H04W64/00 ,  H04W12/069 ,  H04W24/02

CPC classification number: H04W64/006 ,  H04W12/069 ,  H04W24/02

Abstract: A wireless mobile device in a group of wireless mobile devices, configured for wireless communication with a locator device and one or more neighbor wireless mobile devices in the group, configured to obtain a neighbor information list comprising positioning information relative to the neighbor wireless mobile devices, and broadcast a location data message comprising an identity of the wireless mobile device, the neighbor information list and a message authentication code. A locator device, configured for wireless communication with a group of wireless mobile devices and for locating a target wireless mobile device in the group, configured to determine that the target wireless mobile device is not in wireless communication with the locator device, and search for the target wireless mobile device based on the neighbor information lists in the location data messages received from the wireless mobile devices in the group until positioning information of the target wireless mobile device is found.

公开(公告)号：US20240230915A9

公开(公告)日：2024-07-11

申请号：US18486497

申请日：2023-10-13

Applicant: u-blox AG

Inventor： David Bartlett ,  Davide Lenzarini ,  Giovanni Solito

IPC: G01S19/08 ,  G01S19/55

CPC classification number: G01S19/08 ,  G01S19/55

Abstract: Methods and apparatus are disclosed for gathering raw Global Navigation Satellite Systems (GNSS) phase measurements at a GNSS receiver and making them available to a remote device for processing to calculate a position fix for the GNSS receiver. The measurements are arranged in a first subset and a second subset. First bits of the first subset and second bits of the second subset are embedded in one or more data messages for transmission to the remote device. The first bits include a coarse part and a fine part of the respective phase measurement. In contrast, the second bits describe at least a portion of the fine part, but none of the coarse part, of the respective phase measurement.

公开(公告)号：US20240031144A1

公开(公告)日：2024-01-25

申请号：US18356605

申请日：2023-07-21

Applicant: u-blox AG

Inventor： Davide Lenzarini ,  Michele LaManna ,  Carlo Vallati ,  Riccardo Xefraj ,  Pericle Perazzo

IPC: H04L9/08 ,  H04L9/30

CPC classification number: H04L9/0869 ,  H04L9/30

Abstract: In a method for protecting payload data transmitted via a one-to-many communication channel from a provider device to at least one receiver device a public key set (PK) supporting asymmetric bilinear pairings is generated. A number of receiver device keys (DKi) that are generated based on the public key set (PK) are distributed to respective devices including the at least one receiver device. A provider key (K) is generated based on the public key set (PK) and inter alia on an encryption random number (t) and stored in the provider device. An envelope (ENV) is generated based on the public key set (PK) and on the encryption random number (t) and is distributed, via the one-to-many communication channel, to the respective devices including the at least one receiver device. The at least one receiver device generates a receiver key, which corresponds to the provider key, based on the distributed envelope (ENV) and the distributed receiver device key (DKi). The provider device encrypts and/or signs the payload data employing the provider key (K) for producing protected payload data and distributes them via the one-to-many communication channel to the respective devices. The at least one receiver device processes, e.g. by decrypting and/or authenticating, the protected payload data employing the receiver key.

公开(公告)号：US20230266477A1

公开(公告)日：2023-08-24

申请号：US18156150

申请日：2023-01-18

Applicant: u-blox AG

Inventor： Zhenlan Cheng

IPC: G01S19/29 ,  G01S19/07 ,  G01S19/25

CPC classification number: G01S19/29 ,  G01S19/07 ,  G01S19/256

Abstract: A method and apparatus are provided for detecting GNSS signal lock. An example method includes tracking a plurality of signals received from a respective plurality of satellites in the GNSS, and calculating an individual frequency spectrum for each tracked signal in the plurality, to produce a plurality of individual frequency spectra. The example method further includes combining one or more values from several of the individual frequency spectra, to produce one or more combined values; and detecting an ensemble signal lock condition based at least in part on the one or more combined values.

公开(公告)号：US20230184872A1

公开(公告)日：2023-06-15

申请号：US18079260

申请日：2022-12-12

Applicant: u-blox AG

Inventor： Dimitris KALOGIROS ,  Ioannis SARRIS ,  Matthias MAHLIG ,  Peter KARLSSON

IPC: G01S5/02 ,  H04W64/00

CPC classification number: G01S5/021 ,  H04W64/003

Abstract: Calibrating an anchor point in a positioning system includes, in an example implementation, transmitting a localization signal between a mobile device and the anchor point, determining a first direction between the mobile device and the anchor point in a local coordinate system based on the transmitted localization signal, and determining a second direction between the mobile device and the anchor point in a global coordinate system based on the determined first direction and a stored anchor orientation of the anchor point, the anchor orientation defining the local coordinate system of the anchor point with respect to the global coordinate system. Calibrating the anchor point further includes acquiring a target position of the mobile device, the target position being associated with the transmitted localization signal, determining a third direction between the mobile device and the anchor point in the global coordinate system based on a known anchor position and the target position, and adjusting the stored anchor orientation based on the first direction and a difference between the second and the third direction.

公开(公告)号：US20230078300A1

公开(公告)日：2023-03-16

申请号：US17940427

申请日：2022-09-08

Applicant: u-blox AG

Inventor： Norman Beamish ,  Christopher Brian Marshall

IPC: H04B17/29 ,  H04B17/309 ,  H04W72/04

Abstract: An example method for enabling coherent reception of a radio signal includes, in some implementations, tuning a radio receiver to a first receiver frequency, generating within the radio receiver a test signal having a first test frequency, and measuring a first phase of the test signal while the radio receiver is tuned to the first receiver frequency. The example method also includes tuning the radio receiver to a second receiver frequency, which is different from the first receiver frequency, measuring a second phase of the test signal while the radio receiver is tuned to the second receiver frequency, and calculating a phase relationship depending on the first and second phases of the test signal. A radio receiver for coherent reception of a radio signal also is disclosed.

公开(公告)号：US11585944B2

公开(公告)日：2023-02-21

申请号：US17090688

申请日：2020-11-05

Applicant: u-blox AG

Inventor： Paula Syrjärinne ,  Christoph J. Schmid

IPC: G01S19/22 ,  G01S19/29 ,  G01S19/32

Abstract: A method of and a receiver for mitigating multipath interference in a global navigation satellite system. In accordance with an embodiment, GNSS signals are received from a plurality of satellites in at least two frequency bands. A likelihood indicator is determined which is indicative of how likely the received GNSS signals are affected by multipath interference. In response to the likelihood indicator, all GNSS signals from at least one frequency band of the at least two frequency bands are discounted. The received GNSS signals are processed by taking into account said discounting of all GNSS signals in the at least one frequency band. The discounting may include assigning less weight to the discounted frequency bands or disregarding each of the discounted frequency bands in their entirety.

公开(公告)号：US11567164B2

公开(公告)日：2023-01-31

申请号：US16466272

申请日：2016-12-01

Applicant: u-blox AG

Inventor： Christopher Marshall ,  Pascal Herczog ,  Dusko Vujadinovic

IPC: G01S5/02 ,  G01S5/00 ,  G01S5/14 ,  H04W64/00

Abstract: Methods and apparatus are disclosed for sharing assistance information relating to an uplink signal transmitted by a first User Equipment. The assistance information may be used to assist a wireless communication device to intercept the uplink signal and measure its time of arrival. The assistance information may be used to assist in the calculation of a position or time, based on the measured time of arrival.