| Citation: | LU H，ZHANG F，ZHANG Y X. ACARS signal receiving method based on window demodulation of zero-crossing slope[J]. Journal of Beijing University of Aeronautics and Astronautics，2024，50（3）：716-728 （in Chinese） doi: 10.13700/j.bh.1001-5965.2022.0292
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The aircraft communication addressing and reporting system (ACARS) is a digital communication system that allows messages to be sent and received between aircraft and ground stations. It is important for ground-to-air data links, flight safety, and air traffic control. The noise and frequency offset of the communication link are the key factors that affect the performance of ACARS signal reception. Aiming at the distortion in the ACARS signal receiving process, this paper deeply studies the relationship between the frequency offset, environmental noise and other factors and the ACARS message receiving performance. An ACARS signal receiving method based on zero-crossing slope window demodulation is proposed, and the anti-frequency offset resistance of various methods is discussed from the two aspects of theory and simulation analysis. This is based on fully accounting for factors like noise and Doppler frequency shift.This article uses the USRP architecture to design and construct an ACARS reception system based on the software radio platform.Through the simulation analysis of the ACARS message reception performance and the comparison analysis of the real message reception performance, the proposed demodulation method has advantages in improving the anti-noise and frequency offset ability and reducing the bit error rate.
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