The GNSS signal simulator can accurately simulate the GNSS satellite signals received by the carrier according to the status of the motion carrier, and can measure the capture, tracking and measurement accuracy of the GNSS receiver, and is a key measurement instrument in the GNSS receiver calibration process. With the proliferation of high-precision GNSS receivers, GNSS signal simulators continue to enter various industries. In order to adapt to the development of China's satellite navigation and positioning technology and meet the precision calibration of satellite navigation and positioning equipment, China urgently needs to establish a GNSS signal simulator calibration device and method with comprehensive calibration targets, high accuracy and stability.
In combination with the current calibration problem of satellite navigation signal simulators, the project team proposes a dynamic scene calibration based on least-squares model parameter estimation method and a zero-value measurement method based on Hilbert transform envelope detection. Establishment of a calibration device. The project team has published 2 articles, applied for 5 invention patents, and participated in the formulation of a national measurement calibration standard.
The research results of this project support the construction of the National Satellite Navigation and Positioning Service Product Quality Supervision and Inspection Center (Shanghai), and also provide technical support for China's independently developed satellite navigation signal simulation and calibration of receiving equipment.
(Original title: "Satellite Signal Simulator High-precision Test Method Research and Calibration Device Establishment" Project Accepted)
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