Time delay absolute calibration method for multi-mode satellite navigation receiver

A navigation receiver, multi-mode satellite technology, applied in satellite radio beacon positioning systems, measuring devices, instruments and other directions, can solve problems such as difficult calibration errors and separation

Active Publication Date: 2018-08-28
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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Problems solved by technology

Although this method is simple to operate, it can only obtain the relative delay between the receiver under test and the reference receiver, and it is difficult to separate the calibration error from the system difference. It is mainly used in time transfer such as satellite two-way, common-view comparison, etc.

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  • Time delay absolute calibration method for multi-mode satellite navigation receiver
  • Time delay absolute calibration method for multi-mode satellite navigation receiver
  • Time delay absolute calibration method for multi-mode satellite navigation receiver

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0021] Before absolute calibration, the simulator needs to be self-calibrated, and the time delay between the output signal of the simulator and the receiver is measured. After the receiver is positioned successfully, the channel delay of the receiver is calculated by calculating the pseudo-range measurement value output by the receiver and the simulator, and the counter measures the time difference between the receiver and the simulator output 1PPS signal to obtain the 1PPS link delay and channel delay Adding 1PPS link delay is the absolute delay of the receiver. At the same time, the phase relationship of the external reference signal of the receiver is changed, and the delay deviation of the receiver under different reference signal phase differences is compared. The ab...

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Abstract

The invention provides a time delay absolute calibration method for a multi-mode satellite navigation receiver. According to the method, firstly, a pseudorange measurement value outputted by the receiver is acquired; secondly, a 1PPS signal is reproduced through the receiver, and the actual output time delay is generated; and lastly, the time delay of the receiver is acquired. The absolute time delay of the receiver in different systems, different frequency bands and different pseudo-codes are fully calibrated through utilizing a satellite signal simulator, including the reception channel timedelay and the 1PPS link time delay, time delay deviation of the receiver under phase difference of different reference signals can be calibrated, the method is not only suitable for receivers in various types, and the method is further applicable to time delay calibration of navigation satellites and comprehensive base bands.

Description

technical field [0001] The invention relates to a high-precision time-delay calibration method for a multi-mode satellite navigation receiver, in particular, it can accurately calibrate the absolute time-delay of the receiver under different systems, different frequency bands and different pseudo-codes. Background technique [0002] The time delay calibration of receivers has always been a difficult point in the navigation field. At present, the more common method is relative time delay calibration, and the time delay deviation between receivers is obtained by means of homologous zero baseline comparison. Although this method is simple to operate, it can only obtain the relative delay between the receiver under test and the reference receiver, and it is difficult to separate the calibration error from the system error. It is mainly used in time transfer such as satellite two-way and common-view comparison. For multi-mode satellite navigation receivers, in many occasions (suc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23
CPCG01S19/235
Inventor 朱峰张慧君李孝辉黄璐希许龙霞
Owner NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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