Receiver towing method, device, computer equipment and storage medium

Abstract

The present application relates to a receiver towing method, device, computer equipment and storage medium. The method includes: receiving the navigation digital intermediate frequency signal; capturing the code phase of the navigation digital intermediate frequency signal, generating the first code phase segment and the second code phase segment according to the code phase; taking the preset code interval as the scanning cycle, and scanning the first The code phase segment and the second code phase segment; the code phase energy of multiple scan cycles in the first code phase segment is accumulated to obtain an energy accumulation value, and the energy accumulation value is averaged according to the number of scan cycles to obtain a reference noise bottom; the code phase energies of multiple scan cycles in the second code phase segment are divided by the reference noise floor respectively to obtain multiple code phase ratio results; judge whether the code phase ratio results are greater than the set threshold, and if they are greater than the set threshold, then according to The result of the code phase ratio starts the tracking channel for traction. By adopting the method, the code phase deviation can be obtained more accurately, and the traction range can be expanded.

Description

technical field [0001] The present application relates to the technical field of satellite positioning, in particular to a receiver towing method, device, computer equipment and storage medium. Background technique [0002] With the development of satellite positioning technology, receiver towing technology has emerged. At present, the traction mode of the Beidou B1C receiver in the prior art is as follows: [0003] The B1C signal is broadcast on the Beidou-3 MEO satellite and IGSO satellite. The carrier frequency is 1575.42MHz, the ranging code rate is 1.023MHz, the ranging code length is 10230, and the ranging code period is 10ms. The navigation message chip period is 10ms. This means that a bit flip may occur every time a ranging code time elapses. In the conventional traction method, the correlation time of the frequency locked loop is one ranging code period. In order to avoid the influence of the bit flip on the frequency discriminator, a frequency discriminator tha...

AI Technical Summary

Problems solved by technology

For B1C strong signal reception, the captured frequency deviation is much larger than 25Hz, which leads to the failure of the conventional pulling method to reduce the frequency deviation to a range that can be locked

When the B1C receiver signal channel enters the pull-in phase from the capture phase, there is a delay, which causes a deviation between the initial code phase and the captured code phase when the tracking channel is started, and the frequency pull-in range is small, and the captured frequency deviation cannot be reduced. small enough to be locked

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