A method of decoding common-frequency overlapping of 1090 ES signals based on secondary inflexion-point method

Abstract

In a method of decoding common-frequency overlapping of 1090 ES signals based on secondary inflexion-point method of the present invention, a video signal relevant accumulation is adopted, and two rounds of inflexion-point detection is performed, to extract a secondary inflexion-point and determine a starting time and a terminating time of double overlapped pulses, so as to achieve the function of correctly decoding under the circumstance of 1090 ES signals overlapping. Since it is hard for the common-frequency overlapped pulses to be separated from the angle of the signals, the present invention considers from the time domain feature of the overlapped signals of an envelope, and recovers the frame of the original signals by determining the starting time and the terminating time of the two overlapped pulses. The present invention can technically improve the current 1090 ES ground monitoring system, achieve correct decoding under the circumstance of 1090 ES signals overlapping, and increasing the continuous monitoring ability of the ground monitoring system at the airspace with multiple targets.

Description

Technical field [0001] The invention relates to a 1090ES signal decoupling method based on a secondary inflection point method, and in particular to a 1090ES signal decoupling method based on a secondary inflection point method. Background technique [0002] The Broadcast Automatic Dependent Surveillance (ADS-B) system is an air traffic control technology commonly used in the international civil aviation system. It is an aircraft operation monitoring system based on GPS global satellite positioning system and air-to-air data link communication. The ADS-B system realizes the monitoring function of the target on the ground or in the air by the aircraft actively sending its own relevant information. The International Civil Aviation Organization (ICAO) has identified it as the main direction for future surveillance technology development, and the international aviation community is actively promoting the application of this technology. Compared with the traditional secondary radar s...

AI Technical Summary

Problems solved by technology

However, in the airspace near a large hub airport with a large number of targets, the probability of signal overlap is greatly increased, and signal overlap will seriously affect the accuracy and reliability of the ground surveillance system to obtain target information

At present, the ground surveillance systems developed by domestic manufacturers do not yet have the ability to decompose the same frequency overlap of 1090ES pulse signals

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