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公开(公告)号：US20240361468A1
公开(公告)日：2024-10-31
申请号：US18646965
申请日：2024-04-26
Applicant: UTI Limited Partnership
Inventor： Naser EL-SHEIMY , Yiran LUO
Abstract: Systems and methods for determining a user's absolute acceleration/deceleration on an Earth based reference frame. Signals from multiple satellites are received and the Doppler rate for each satellite is extracted using baseband signal processing. Then, using each satellite's ephemeris, the acceleration/deceleration and Earth frame position of each satellite is determined. The user's absolute position is then used, along with each satellite's position to calculate direction cosine vector projections for each satellite. The user's absolute acceleration/deceleration is then calculated using the various direction cosine vector projections, the various satellite acceleration/deceleration values, and each satellite's Doppler rates. The resulting absolute acceleration/deceleration can then be used for more accurate navigation solutions.
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公开(公告)号：US12123958B2
公开(公告)日：2024-10-22
申请号：US17978590
申请日：2022-11-01
Inventor： John E. Acheson
Abstract: Techniques are provided for batch processing signal acquisition. A batch processing signal acquisition system implementing the techniques according to an embodiment includes a recording controller configured to store samples of an input signal to a memory. The input signal is received at a first sampling rate. The system also includes a playback controller configured to read samples from the memory for playback of the input signal at a second sampling rate. The system further includes an acquisition processor configured to detect and locate, in time and frequency, a signal of interest in the playback of the input signal. The system further includes a signal processor configured to process the signal of interest in the playback of the input signal based on the detection and location provided by the acquisition processor.
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公开(公告)号：US20240272304A1
公开(公告)日：2024-08-15
申请号：US18569557
申请日：2022-05-19
Applicant: Robert Bosch GmbH
Inventor： Christian Skupin , David Oertel
CPC classification number: G01S19/215 , G01S19/29
Abstract: A method for detecting GNSS spoofing by way of GNSS receiver of a localization system is disclosed. The GNSS receiver includes an antenna for receiving GNSS signals. The GNSS signals are emitted by at least one GNSS satellite and are received by the GNSS receiver in such a way that each GNSS signal is shifted by a frequency difference. The method includes a) receiving a GNSS signal by way of the antenna, b) measuring the frequency difference between the frequency of the GNSS signal emitted by a GNSS satellite and the frequency of the GNSS signal received by the antenna, c) determining the rate of change of the frequency difference by using motion change information relating to the GNSS receiver, d) checking if the determined rate of change corresponds to a rate of change characteristic of satellite signal reception, and e) detecting GNSS spoofing if the determined rate of change does not match satellite signal reception.
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公开(公告)号：US20240241266A1
公开(公告)日：2024-07-18
申请号：US18097762
申请日：2023-01-17
Applicant: Rockwell Collins, Inc.
Inventor： David A. Anderson , Jeffrey B. Bishop , Matthew D. Bousselot , Douglas P. Burch
Abstract: A receiver system is disclosed. The receiver system may include an omnidirectional receiver configured to receive an incoming signal, a directional receiver configured to receive the incoming signal, and an integrity controller. The integrity controller may be configured to determine an integrity of the incoming signal by synchronizing a clock of the omnidirectional receiver and a clock of the directional receiver, receiving an omnidirectional signal of the incoming signal, receiving a directional signal of the incoming signal, translating between a phase of the omnidirectional signal and a phase of the directional signal based on the synchronizing, ensuring a signal equivalency based on the translating, calculating an angle of arrival of the incoming signal based on carrier phase differences associated with the directional signal, and identifying the incoming signal as a trusted satellite signal based on a comparison of the angle of arrival with an expected angle of arrival.
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5.发明公开公开(公告)号：US20240219579A1
公开(公告)日：2024-07-04
申请号：US18072866
申请日：2022-12-01
Applicant: Intelligent Fusion Technology, Inc.
Inventor： Dan SHEN , Genshe CHEN , Tien NGUYEN , Khanh PHAM
Abstract: A global navigation satellite system (GNSS) is disclosed comprising a transmitter. The transmitter is configured to: receive a plurality of frequencies; determine a minimum frequency from the plurality of frequencies; determine a maximum frequency from the plurality of frequencies; determine a carrier from the minimum frequency and the maximum frequency; determine a set of subcarriers from the carrier and the plurality of frequencies; identify optimal radius of desired phase points to select optimal subcarriers from the set of subcarriers; determine inter-modulation terms with a minimal energy based on the optimal subcarriers; and generate multi-carrier constant envelope waveforms based on the inter-modulation terms.
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Patent Agency Ranking
公开(公告)号：US20240142635A1
公开(公告)日：2024-05-02
申请号：US17978590
申请日：2022-11-01
Inventor： John E. Acheson
Abstract: Techniques are provided for batch processing signal acquisition. A batch processing signal acquisition system implementing the techniques according to an embodiment includes a recording controller configured to store samples of an input signal to a memory. The input signal is received at a first sampling rate. The system also includes a playback controller configured to read samples from the memory for playback of the input signal at a second sampling rate. The system further includes an acquisition processor configured to detect and locate, in time and frequency, a signal of interest in the playback of the input signal. The system further includes a signal processor configured to process the signal of interest in the playback of the input signal based on the detection and location provided by the acquisition processor.
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公开(公告)号：US20240053488A1
公开(公告)日：2024-02-15
申请号：US18160298
申请日：2023-01-26
Applicant: Samsung Electronics Co., Ltd.
Inventor： Raul H. ETKIN
IPC: G01S19/29 , H04B17/318
CPC classification number: G01S19/29 , H04B17/318
Abstract: A system and a method are disclosed for handling outages in a Global Navigation Satellite System receiver. In some embodiments, the method includes: determining that a measure of combined signal level is less than a threshold, the measure of combined signal level being a measure of a signal level on a first channel of a Global Navigation Satellite System receiver and measure of a signal level on a second channel of the Global Navigation Satellite System receiver; and opening a tracking loop on a third channel of the Global Navigation Satellite System receiver.
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公开(公告)号：US20240027629A1
公开(公告)日：2024-01-25
申请号：US17868542
申请日：2022-07-19
Applicant: Honeywell International Inc.
Inventor： Yanling Min , Brian Schipper , Xiao Cao
Abstract: Systems and methods for static session multipath detection are described herein. In certain embodiments, a system includes one or more global navigation satellite system (GNSS) receivers configured to receive GNSS signals from multiple GNSS satellites, wherein the GNSS receiver provides GNSS measurements. The system also includes one or more processors configured to receive the GNSS measurements. The one or more processors execute computer-readable instructions that cause the one or more processors to calculate code minus carrier (CMC) measurements for the measurements associated with each satellite; remove trends in the CMC measurements to create detrended CMC measurements; transform the detrended CMC measurements into transformed CMC measurements, wherein the transformed CMC measurements are in the frequency domain; identify multipath amplitude in a multipath frequency window; and determine if a GNSS signal is subject to multipath based on a comparison of the identified multipath amplitude against a code noise amplitude.
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9.发明公开公开(公告)号：US20240012158A1
公开(公告)日：2024-01-11
申请号：US18035074
申请日：2021-10-14
Applicant: SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION
Inventor： Chang Don Kee , Jungbeom Kim , O Jong Kim , Yonghwan Bae
Abstract: A method for estimating a multipath error of a pseudo-range measurement value, according to an embodiment of the present invention, comprises the steps of: obtaining satellite navigation system information including a pseudo-range measurement value and a carrier wave phase measurement value; obtaining a carrier wave phase time difference measurement value by differentiating the carrier wave phase measurement value with respect to an arbitrary time; setting a monitoring variable for multipath error estimation by using the carrier wave phase time difference measurement value; detecting a change amount of a multipath error regarding the arbitrary time by using the monitoring variable, and determining a time period that can be used to estimate the multipath error; and estimating the multipath error at a specific time point by using the change amount of the multipath error relative to an arbitrary reference time. According to an embodiment, the location of a target can be precisely determined even in a downtown environment in which signal distortion is severe, by estimating the multipath error included in the pseudo-range measurement value, and compensating for or excluding the multipath error.
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公开(公告)号：US11860283B2
公开(公告)日：2024-01-02
申请号：US17946625
申请日：2022-09-16
Applicant: GE Aviation Systems Limited
Inventor： Stefan Alexander Schwindt
CPC classification number: G01S19/215 , G01S19/21 , G01S19/246 , G01S19/29
Abstract: An aircraft and non-transitory computer-readable medium for detecting the spoofing of a signal from a satellite in orbit. A receiver on the aircraft to receive an apparent satellite signal. A computer for determining at least two characteristic signatures of the signal including a power level, and indicating the apparent satellite signal is a spoofed satellite signal.
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