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Delay Absolute Calibration Method for Multi-mode Satellite Navigation Receiver

A technology for navigation receivers and multi-mode satellites, which can be used in satellite radio beacon positioning systems, instruments, measuring devices, etc., and can solve problems such as difficult calibration errors and separation

Active Publication Date: 2021-05-04
NAT TIME SERVICE CENT CHINESE ACAD OF SCI
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  • Description
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  • Application Information

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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.

Method used

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  • Delay Absolute Calibration Method for Multi-mode Satellite Navigation Receiver
  • Delay Absolute Calibration Method for Multi-mode Satellite Navigation Receiver
  • 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 an absolute time delay calibration method of a multi-mode satellite navigation receiver. Firstly, the receiver outputs the pseudorange measurement value, and then reproduces the delay of the 1PPS signal from generation to actual output through the receiver, and finally obtains the time delay of the receiver. delay. The invention utilizes the satellite signal simulator to fully calibrate the absolute time delay of the receiver under different systems, different frequency bands and different pseudo codes, including the receiving channel time delay and 1PPS link time delay, and can also calibrate the receiver in different reference signal phases The time delay deviation under the difference. This method is not only applicable to various types of receivers, but also can be applied to the time delay calibration of navigation satellites and integrated basebands.

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 Patents(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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