Burst signal frequency deviation correction method applied to satellite phones

Abstract

The invention discloses a burst signal frequency deviation correction method applied to satellite phones. The method comprises the steps that signals are received, and data caching is carried out on the signals; local standard sequences are generated, and shaping filtering is carried out on the local standard sequences; sliding correlation is carried out on the cached signals and local sequences obtained after shaping filtering, and the initial positions of burst signals are found according to correlation peaks; according to the obtained initial positions of the burst signals, a complete set of burst signals are taken out of a cache, and phase difference calculation of corresponding points of the burst signals and the local standard sequences is carried out; the phase difference slope is worked out according to N corresponding points received continuously, phase jump removal and glitch removal are carried out on an obtained slope curve, linear processing is carried out on a slope curve obtained after phase jump removal and glitch removal, and then a frequency deviation estimated value is obtained. The method eliminates dependence on channel estimation in the prior art and is accurate in frequency deviation estimation.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a burst signal frequency offset correction method applied to a satellite phone. Background technique [0002] In the past half a century, with the globalization of capital, industry, resource supply, and personnel flow, the global communication industry has achieved considerable development. Satellite communication has the characteristics of wide coverage, strong timeliness, flexible networking, and no geographical restrictions. It is related to national security in aerospace, military, disaster early warning and rescue, navigation, transportation, television broadcasting, and financial services. The field of national economy and people's livelihood has been widely used and has achieved great development. In recent years, satellite communication is still opening up and expanding new application fields. [0003] The satellite communication system consists of three...

AI Technical Summary

Problems solved by technology

[0034] The present invention provides a burst signal frequency offset correction method applied to satellite phones, which solves the problem that the frequency offset estimation will be inaccurate when the channel estimation is inaccurate or there is no channel estimation in the prior art burst signal frequency offset processing method. Accurate technical problems overcome the dependence on channel estimation in the prior art, the frequency offset estimation is accurate, and the required hardware environment conditions are more relaxed, the power consumption during operation is smaller, and the technical effect of the realization method is simpler

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