Invention Grant
- Patent Title: Methods and devices for global navigation satellite system (GNSS) signal acquisition
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Application No.: US16862360Application Date: 2020-04-29
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Publication No.: US11630217B2Publication Date: 2023-04-18
- Inventor: Wei Yu , Richard G. Keegan , Mark P. Kaplan
- Applicant: Deere & Company
- Applicant Address: US IL Moline
- Assignee: Deere & Company
- Current Assignee: Deere & Company
- Current Assignee Address: US IL Moline
- Agency: Morgan, Lewis & Bockius LLP
- Main IPC: G01S19/29
- IPC: G01S19/29 ; G01S19/30 ; G01S19/37 ; H04B1/7075

Abstract:
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.
Public/Granted literature
- US20220357461A1 Methods and Devices for Global Navigation Satellite System (GNSS) Signal Acquisition Public/Granted day:2022-11-10
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