Spaceborne ads-b signal header detection system and method

Abstract

The invention provides a satellite-borne ADS-B signal header detection system and method. The system comprises an envelope extraction module, an AGC module, a filtering module, a digital phase-lockedloop and a header frame detection module, wherein the envelope extraction module is used to perform envelope extraction on baseband signals of two paths of orthogonal signals that are received to obtain an envelope signal; the AGC module is connected with the output end of the envelope extraction module and is used to perform automatic gain control on the envelope signal; the filtering module is connected with the output end of the AGC module and is used to carry out filtering processing on the envelop signal processed by the AGC module; the digital phase-locked loop is connected with the output end of the filtering module, and is used to perform the tracking on the signal that is processed by the filtering module by a local clock and output a bit synchronization pulse; and the header frame detection module is used to collect header data according to the location of the bit synchronization pulse, perform frame synchronization with a preset header data format, determine that the frame detection is successful if the frame synchronization can be locked, and further obtain a header frame. Thereby, the problem of insufficient sensitivity of traditional ADS-B receivers can be solved.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a detection system and method for a star-borne ADS-B signal header. Background technique [0002] Automatic Dependent Surveillance-Broadcast (ADS-B for short) adopts omnidirectional broadcasting to broadcast its air position information, air speed information, identity information, working status and status information, etc., and the aircraft automatically moves to the aircraft, vehicles and ground to receive The device transmits a signal at a frequency of 1090MHz. In addition to air-to-air surveillance and air-to-ground surveillance, the ADS-B signal receiver can also realize other functions, such as: automatic identification of mutual positions of air planes and keeping a safe distance; the ground receiving station can fly on the route aircraft for surveillance and command. [0003] The coverage radius of the spaceborne ADS-B receiver can reach 3000km, which is a huge...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a spaceborne ADS-B signal header detection system and method to overcome the problem of insufficient sensitivity of traditional ADS-B receivers

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