Dynamic satellite communication system signal tracking method and device

Abstract

The invention provides a dynamic satellite communication system signal tracking method and device, and relates to the technical field of satellite communication, and the method comprises the steps: obtaining a target signal transmitted by a satellite, and enabling the target signal to be a signal obtained after the preprocessing of information source data; calculating a Doppler frequency offset value of the target signal, and compensating the target signal by using the Doppler frequency offset value to obtain a compensated target signal; calculating a code loop phase difference and a trackingfrequency change error of the compensated target signal by using a third-order tracking loop, and synchronizing the compensated target signal by using the code loop phase difference and the tracking frequency change error to obtain a synchronization signal; sequentially performing descrambling processing, de-interleaving processing and decoding processing on the synchronization signal so as to track the satellite. Therefore, the technical problem of the influence of the Doppler effect on satellite communication in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a signal tracking method and device for a dynamic satellite communication system. Background technique [0002] With the development of 6G technology, satellite communication has been introduced into the 6G communication system. Satellite communication can play an important role in 6G. One of its uses is to provide communication services to users around the world, especially those remote areas that cannot be reached by 6G infrastructure. The satellite communication system plays an important role in the 6G air-space-ground integrated communication system, which can not only enhance the reliability of 6G services, but also expand the scope of 6G services. [0003] However, most current satellite communication systems are mainly designed for low-speed terminals, and it is difficult for traditional satellite communication systems to provide reliable services for high...

AI Technical Summary

Problems solved by technology

[0004] Different from traditional satellite communication systems, high-mobility terminals will generate time-varying Doppler frequency offsets with a large range and rapid changes, resulting in a frequency mismatch between the transmitter and receiver, which seriously weakens the bit error rate performance of the communication system

Traditional Doppler frequency offset estimation and tracking methods based on pilot distribution are difficult to accurately estimate rapidly changing time-varying Doppler signals

In addition, the link resources of the satellite are limited. In the environment of high dynamic and low noise ratio, the high-order loop is easy to lose the lock, and the stable tracking of the high dynamic signal cannot be completed.

At the same time, considering that the limited spectrum resources of satellites are difficult to support a large amount of pilot overhead, it is difficult for the traditional carrier synchronization algorithm based on pilot distribution to play a role

[0005] For the above problems, no effective solution has been proposed

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