A Method for Obtaining Satellite Broadcasting Frame Header

Abstract

The invention provides a satellite broadcast frame header acquisition method. Frame header synchronization in a wide signal to noise ratio range can be adapted. Matched filter hardware realization iseasy. An appropriate frame header length is selected according to a specific application scene; a satellite broadcast frame header is obtained based on a multilayer m sequence; the frame header synchronization in the wide signal to noise ratio range can be adapted; the method is applicable to satellite broadcast signal transmission orienting to antennas of different receiving apertures; the signalto noise ratio loss resulting from rain attenuation and inaccurate satellite direction due to relative movement can be avoided; and a receiving signal to noise ratio has a very large wide range. According to the method provided by the invention, the satellite broadcast frame header can be obtained through adoption of the multilayer m sequence structure, the hardware realization complexity is clearly reduced, the matched filter hardware realization is easy, and the obtained frame header has a good autocorrelation characteristic and can be captured rapidly.

Description

technical field [0001] The invention relates to the technical field of physical layer transmission of a satellite digital broadcast communication system, in particular to a method for obtaining a satellite broadcast frame header. Background technique [0002] In the transmission of digital satellite broadcasting services, satellites broadcast services to receiving terminals within the coverage area. Satellite broadcasting services must realize reliable reception of terminals with different antenna calibers within the coverage area. Digital satellite broadcasting services include a variety of integrated digital services. Different service types have different requirements for physical layer transmission. For example, voice has lower requirements for physical layer transmission performance, while file and short message services have higher requirements for transmission performance, which mainly reflects the need for digital broadcast communication. Physical layer bit error rat...

AI Technical Summary

Problems solved by technology

[0004] In addition, satellite channels are transmitted wirelessly, and the channel transmission time is long (especially for GEO satellites), which is easily affected by rainfall, snowfall and electromagnetic waves. For high-frequency (Ku, Ka) frequency bands, it is significantly affected by rain attenuation, causing serious The loss of the receiving signal-to-noise ratio; and due to the relative movement of the satellite, it will also bring the pointing deviation of the terminal antenna, resulting in the loss of the receiving signal-to-noise ratio

If considering a large signal-to-noise ratio range, directly using an m-sequence to obtain the satellite broadcast frame header, the hardware implementation is very complicated, it cannot match the filter hardware, and cannot be quickly captured

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