Satellite-borne ADS-B group signal receiving and processing method

Abstract

The invention discloses a satellite-borne ADS-B group signal receiving and processing method, and the method employs a signal processing method and a time division multiplexing structure under oversampling for the characteristics of a group ADS-B signal. The demodulation structure comprises a group signal delay control module, an oversampling demodulation module and an information verification output module. The group signal delay control module completes the function of converting parallel signals into serial signals by controlling the delay of the parallel group signals; the oversampling demodulation module carries out sliding correlation on the oversampling signal and a local standard pulse signal and then demodulates the oversampling signal to obtain demodulation information of the oversampling signal; and the information verification output module screens the demodulated repeated information and confirms the correctness of the demodulated information through CRC verification. According to the invention, the resource consumption is reduced by improving the clock utilization rate in the demodulation of the ADSB group signals, and the detection performance of the system on the ADSB signals is greatly improved because the received signals do not need to be subjected to burst detection in the oversampling demodulation process.

Description

technical field [0001] The invention relates to a method for receiving and processing satellite-borne ADS-B group signals, which belongs to the field of communication signal processing. Background technique [0002] ADS-B technology is a very important communication and surveillance technology in the field of aviation, especially in the field of civil aviation. It integrates conflict detection, conflict avoidance, conflict resolution, air traffic management (Air Traffic Controller, ATC) The organic combination of information display enhances and expands very rich functions for the aviation system. ADS-B technology enables the aircraft to automatically obtain parameters from related airborne equipment and broadcast the aircraft's own position, altitude, speed, heading, identification number and other information to other aircraft or ground stations. The satellite-based ADS-B system can not only provide real-time monitoring services for aircraft outside the country, effective...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies in the prior art, and provide a method for receiving and processing satellite-borne ADS-B group signals. Adjusting the structure, greatly reducing the resource occupancy rate of the demodulator of the group channel signal; secondly, in response to the poor burst detection performance of the ADS-B signal, an ADS-B signal demodulation algorithm under oversampling is proposed, and the demodulation process does not require a burst detection, eliminating the impact of burst detection on demodulation and improving signal detection performance

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