Rapid frequency sweeping scheme for broadband satellite signals

Abstract

The invention relates to a rapid frequency sweeping scheme for broadband satellite signals, and belongs to the technical field of satellite communication. The method comprises the following steps: 1,carrying out frequency domain sweep processing on a broadband satellite signal to obtain a plurality of sub-channel frequency point sets S meeting a specified threshold condition; 2, traversing the sub-channel frequency point set S, and sequentially performing digital down-conversion, low-pass filtering, down-sampling and signal detection algorithm work on each frequency point to obtain an accurate time domain sweep frequency result; 3, according to the characteristic that the satellite system synchronization signal is repeatedly sent in a certain period, performing frequency domain frequencysweep, and performing accurate synchronization channel frequency sweep by utilizing the period. The frequency domain and time domain combined secondary frequency sweep method is realized, the frequency sweep delay time is greatly shortened, the frequency sweep processing is ensured to be rapid and accurate, and the system monitoring performance and the user experience are greatly improved. According to the invention, the problems of large time delay, low frequency sweeping speed, poor accuracy and great reduction of system monitoring performance and user experience caused by an existing sub-channel independent processing mode are solved.

Description

technical field [0001] The invention relates to a fast frequency scanning scheme of broadband satellite signals, which belongs to the technical field of satellite communication. Background technique [0002] Nowadays, satellite communication technology has been gradually integrated into people's daily life. Satellite phones realize all-round communication in remote areas, deep mountains, seas, and deserts, filling the gaps in the coverage of existing mobile phone and wired phone communications. In the process of satellite communication, monitoring satellite communication signal is very important. Commonly used satellite signals contain broadband signals of many frequency-domain sub-channels. Time-division multiple access + frequency-division multiple access is used to allocate multi-user resources. Therefore, how to quickly realize frequency scanning and Identification becomes a key indicator of the satellite communication monitoring system. The traditional broadband sate...

AI Technical Summary

Problems solved by technology

In order to solve the problem that the existing technology uses separate processing of sub-channels, resulting in a very large delay, slow frequency scanning speed, poor accuracy, and greatly reducing the system monitoring performance and user experience.

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