A uat receiving system suitable for spaceborne environment

Abstract

The invention discloses a UAT receiving system suitable for a space-borne environment, which belongs to the field of communication technology. The present invention includes a signal receiving module, a signal detection and frame synchronization module, a carrier synchronization module, a coherent demodulation and RS decoding module, a local first storage module and a local second storage module; the first and second storage modules are respectively used for storing local One-bit, three-bit and five-bit differential signals of baseband I and Q signals, as well as local complex baseband signals; the signal receiving module is used to receive UAT radio frequency signals, demodulate and receive baseband I and Q signals, and send them to the back-end for signal detection and Frame synchronization module, carrier synchronization module, and coherent demodulation and RS decoding module. The signal detection and frame synchronization module completes frame synchronization detection based on the cross-correlation operation of local and received one, three, and five bits, and then completes carrier synchronization and coherence. Demodulation and RS decoding. The invention has large dynamic range, strong anti-frequency deviation performance and high receiving sensitivity.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a UAT (Universal Access Transceiver) receiving system suitable for a spaceborne environment. Background technique [0002] With the development of the aviation industry, the insufficient supervision ability of traditional air radar supervision technology has become more and more prominent. In recent years, with the rapid application and development of ADS-B (Automatic Dependent Surveillance-Broadcast) broadcast automatic dependent surveillance technology, this problem has been solved effectively. ADS-B can provide a very effective monitoring service, which is used to realize the mutual monitoring between aircraft in flight, and between aircraft in flight and ground stations, so as to reduce the occurrence of flight accidents. UAT is a data link technology used in the ADS-B system between civil aviation aircraft and aircraft, between aircraft and monitoring sta...

AI Technical Summary

Problems solved by technology

[0004] The traditional UAT receiving system mostly adopts differential demodulation receiving technology, which has the advantages of being simple and easy to implement, and has strong anti-frequency offset performance. However, the receiver using this receiving technology has low sensitivity and poor anti-noise performance, so it is only suitable for receiving Application scenarios with high signal power

For the reception in the spaceborne environment, due to the long distance between the satellite and the aircraft, the received signal power is small, which makes the reception performance of the traditional UAT receiving system in the spaceborne environment extremely poor, and no longer in the spaceborne environment. Be applicable

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