Satellite-borne ACARS signal receiving and processing method

Abstract

The invention discloses a satellite-borne ACARS signal receiving and processing method, which aims to provide a processing method which is high in detection probability, high in adaptability and low in information transmission bandwidth requirement. The satellite-borne ACARS signal receiving and processing method is realized by the following technical scheme: in satellite load equipment, an antenna receives an ACARS signal from the space radiation, and filters and amplifies the received signal through a receiving channel; an acquisition and processing module performs AD sampling on an analog signal outputted by the receiving channel; a Doppler positive hybrid frequency, a Doppler zero frequency and a Doppler negative hybrid frequency are formed in an FPGA in parallel, digital down-conversion, filtering preprocessing, demodulation and duplication removal, and checking and screening are performed on three ways of down-conversion signals, and a correlation detection algorithm is adopted for carrying out detection, secondary demodulation and differential removal processing on the ACARS signal; and finally, a final demodulation result is formed, and ACARS signal interpretation, signal duplication removal and type screening are performed on the demodulation result through a signal processor, and a screened interpretation result and a demodulation result are transmitted to the ground.

Description

technical field [0001] The invention relates to a technology for receiving, collecting, detecting, demodulating, interpreting, screening and deduplicating ACARS signals of an aircraft communication addressing and reporting system by a receiving processing load assembled on an artificial satellite. Background technique [0002] Aircraft Communications Addressing and Reporting System (ACARS) is a digital data link system that transmits short messages (messages) between aircraft and ground stations via radio or satellite. The aircraft regularly reports the position and status information of the aircraft to the ground data center through the ACARS equipment. In order to reduce crew workload and improve data integrity, airlines introduced the ACARS system in the late 1980s. ACARS realizes the automatic transmission and exchange of data and information between air and ground through the on-board very high frequency communication system (VHF). The system can establish a connectio...

AI Technical Summary

Problems solved by technology

These ACARS receiving systems, which are usually built on the ground or on aircraft, have great limitations, mainly reflected in several days: first, the area covered by each ground system is limited, and it can only monitor a limited area and a limited number of aircraft; The ground-based equipment is greatly affected by the weather and atmospheric environment; the third is that it cannot monitor remote areas and vast ocean areas, and cannot monitor aircraft around the world at the same time

The third is to use the ACARS signal detection method in the frequency domain, and the detection probability is low

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