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1.发明公开公开(公告)号：US20240295663A1
公开(公告)日：2024-09-05
申请号：US18441018
申请日：2024-02-14
发明人： Naser EL-SHEIMY , Yiran LUO
CPC分类号： G01S19/246 , G01S19/29 , G01S19/30 , G01S19/37 , G01S19/396
摘要： Snapshot receiver that comprises a correlator module for correlating incoming GNSS signals and a transform module that transforms resulting correlated outputs using a Fractional Fourier Transform (FrFT) process, to thereby compensate for weak and dynamic signals. The output of the transform module is an estimated Doppler rate with high accuracy. The estimated Doppler rate is passed to a super-resolution-measurement (SRM) module, which outputs error values of the estimated Doppler rate and a pseudorange (measured distance-to-satellite) via a phase dead reckoning (DR) calculation for the snapshot receiver. The pseudorange and error values are passed to a navigator module that determines position information based on those inputs. In some embodiments, the SRM module comprises a maximum likelihood estimator (MLE).
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公开(公告)号：US20240230920A1
公开(公告)日：2024-07-11
申请号：US18547719
申请日：2022-08-30
发明人： Dmitry Anatolyevich RUBTSOV , Fedor Borisovich SERKIN , Dmitry Yuryevich GOLDBERG , Leonid Valerianovich EDELMAN , Sergey Sayarovich BOGOUTDINOV
摘要： A Global Navigation Satellite System (GNSS) receiver for processing GNSS satellite signals use reloadable channel implementation. The configuration of each channel for processing GNSS signals can be saved and loaded to the same or different channels in order to reduce the time required for channel configuration.
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公开(公告)号：US20240210568A1
公开(公告)日：2024-06-27
申请号：US18391203
申请日：2023-12-20
发明人： Danny Elad , Tom Heller
摘要： An integrated circuit may include K transmit circuits that output K transmit signals, where K is a non-zero integer and the K transmit signals are encoded using first Doppler code multiplexing. Moreover, the integrated circuit may include L receive circuits that provide L receive signals (which may correspond to the K transmit signals), where L is a non-zero integer and the L receive signals are encoded using second Doppler code multiplexing. Note that the first and/or the second Doppler code multiplexing may be different from Doppler division multiplexing. Furthermore, the first Doppler code multiplexing may include selectively Doppler shifting a kth transmit signal in the K transmit signals by nk bins between chirps in a frame, and the second Doppler code multiplexing may include selectively Doppler shifting an lth receive signal in the L transmit signals by n1 bins between the chirps in the frame.
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4.发明公开公开(公告)号：US20240036214A1
公开(公告)日：2024-02-01
申请号：US18378018
申请日：2023-10-09
发明人： Wensheng Hua
CPC分类号： G01S19/29 , G01S19/43 , G01S19/37 , G01S19/393 , G01S19/30
摘要： A method for detecting a probe signal at an estimated code delay and an estimated doppler frequency includes: (i) dividing a period of the probe signal into sections each of a predetermined duration; (ii) assigning to each section one of a multiple code categories, each code category being indicative of a signal pattern of the probe signal within the section; and (iii) selecting multiple phase categories for a sinusoidal signal, each phase category being indicative of a range of phases in the sinusoidal signal. Thereafter, the method includes (i) receiving a signal from which the probe signal is to be detected; (ii) dividing the received signal into sections each of the predetermined duration; (iii) assigning each section of the received signal both a corresponding code category and a corresponding phase category, based respectively on the estimated code delay and the doppler frequency; and (iv) separately accumulating sections of the received signal according to the assigned code and phase categories of each section.
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公开(公告)号：US11821993B2
公开(公告)日：2023-11-21
申请号：US17334477
申请日：2021-05-28
申请人： oneNav, Inc.
CPC分类号： G01S19/30 , G01S19/428 , G01S19/46
摘要： Global navigation satellite systems and methods use L5 GNSS signals to acquire secondary code phases of those signals without using L1 GNSS signals to aid in the acquisition of secondary code phases. Various embodiments are described to perform this acquisition.
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6.发明公开公开(公告)号：US20230350077A1
公开(公告)日：2023-11-02
申请号：US17780585
申请日：2020-11-16
申请人： Spaceopal GmbH , DLR Gesellschaft für Raumfahrtanwendungen mbH , DEUTSCHES ZENTRUM FÜR LUFT- UND RAUMFAHRT E.V.
发明人： Andre Bauerhin , André Hauschild , Walter Päffgen
CPC分类号： G01S19/30 , G01S19/29 , G01S19/073
摘要： A method for providing a differential code bias, in particular a primary differential code bias and a secondary differential code bias, in a global navigation satellite system using satellites communicating by using at least a first signal and an additional first signal both having a first carrier frequency and a second signal and an additional second signal both having a second carrier frequency, where a primary differential code bias for the first signal and the second signal is determined and wherein the primary differential code bias is used for determining, and in particular providing, a secondary differential code bias for the additional first signal and the additional second signal.
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公开(公告)号：US11802975B2
公开(公告)日：2023-10-31
申请号：US17259332
申请日：2019-07-11
发明人： Seiji Yoshida , Masakatsu Fujiwara
摘要： A navigation satellite system reception apparatus includes a navigation satellite signal reception unit that calculates a first reception position, and a control unit that calculates an initial value of the first reception position and an orbit position of each of four or more navigation satellites, calculates, based on the calculated first reception position, the calculated orbit position, and time information from the first navigation satellite signals, arrival time of each of the first navigation satellite signals, extracts, based on the calculated arrival time, a second navigation satellite signal, calculates, based on the extracted second navigation satellite signal, a second reception position, recursively performs, by using the calculated second reception position, a calculation process of the arrival time and an extraction process of the second navigation satellite signal, and performs, based on a second navigation satellite signal extracted at end of recursive processing, the positioning process or the time synchronization process.
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公开(公告)号：US11796320B2
公开(公告)日：2023-10-24
申请号：US17075880
申请日：2020-10-21
发明人： Qiaozhong Liang
CPC分类号： G01C21/165 , G01C21/18 , G01S19/30 , G01S19/49 , G01S19/53 , G06F18/214 , G06F18/251
摘要： A positioning method, apparatus, device, and a computer storage medium are provided. The method includes: obtaining update information of an object, the update information including GPS positioning information and dead reckoning position information, the dead reckoning position information being determined according to attitude change information of the object measured by an inertial measurement unit (IMU); determining a fusion positioning model matching the update information, the fusion positioning model being used for performing fusion positioning using the update information; determining error information of the update information, the error information indicating error conditions of the update information; and performing the fusion positioning on the GPS positioning information and the dead reckoning position information of the update information according to the fusion positioning model with the error information to obtain a current position of the object.
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公开(公告)号：US20230258818A1
公开(公告)日：2023-08-17
申请号：US18136076
申请日：2023-04-18
申请人： Deere & Company
发明人： Wei Yu , Richard G. Keegan , Mark P. Kaplan
CPC分类号： G01S19/29 , G01S19/30 , G01S19/37 , H04B1/7075
摘要： A method is provided for acquiring a signal from a satellite in a global navigation satellite system. The signal includes a pseudorandom code. The method includes, for each time period of a plurality of time periods: generating samples of the signal, segments of the samples of the signal are correlated with a local copy of the pseudorandom code, thereby producing correlation values for the time period. A discrete Fourier transform is performed using, as inputs, the correlation values for the respective time period, thereby producing a frequency representation of the correlation values for the time period. The frequency representations of the correlation values for the plurality of time periods are combined according to a data hypothesis. When a magnitude of the combined frequency representations meets predefined criteria, a frequency corresponding to the magnitude is selected as a tracking frequency for the satellite.
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公开(公告)号：US11698464B2
公开(公告)日：2023-07-11
申请号：US16689885
申请日：2019-11-20
摘要： A GNSS receiver comprises a memory interface and a vector processor. The vector processor is configured to: receive, via the memory interface, an array comprising a plurality of correlation results stored in a memory, each correlation result associated with a respective combination of possible receiver parameters for the GNSS receiver; process the array to identify a subset of the correlation results in the array; and retain, in the memory, the identified subset and discard, from the memory, those correlation results of the plurality of correlation results not in the identified subset.
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