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Aircraft signal transmission system and signal transmission method thereof

A signal transmission system and signal transmission technology, applied in transmission systems, radio transmission systems, electrical components, etc., can solve problems such as limited transmission distance, achieve the effect of avoiding transmission interference and realizing RS coding

Active Publication Date: 2016-10-26
CIVIL AVIATION FLIGHT UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an aircraft signal transmission system and its signal transmission method to solve the limitation of transmission distance. The maximum communication distance of 1090ES, UAT mode and VDL4 mode ADS-B does not exceed 400KM, so it needs to be constructed within a radius of 400KM Problems with ADS-B ground receiving stations

Method used

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  • Aircraft signal transmission system and signal transmission method thereof
  • Aircraft signal transmission system and signal transmission method thereof

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Embodiment 1

[0037] Such as figure 1 and figure 2 as shown,

[0038] The aircraft signal transmission system includes a BDS antenna for receiving satellite navigation information, a BDS unit connected to the BDS antenna, an ADS-B interface unit connected to the BDS unit, an ADS-B message encoding unit connected to the ADS-B interface unit, and The UAT radio frequency transmitting unit and the Beidou transmitting unit connected to the ADS-B message coding unit.

[0039] The Beidou airborne ADS-B transmitter researched by the present invention selects Beidou as the GNSS navigation source of the system, and its data link supports the dual mode of traditional UAT data link and Beidou short message communication link. The message is encoded according to ADS-B, and is transmitted on the UAT link of ADS-B at the same time, and is transmitted on the Beidou short message data link at the same time, realizing the dual-link parallel transmission mechanism. The UAT link of ADS-B is the UAT radio f...

Embodiment 2

[0055] Such as figure 1 and figure 2 as shown,

[0056] The signal transmission method based on the described aircraft signal transmission system comprises the following steps:

[0057] Receive satellite navigation information through BDS antenna;

[0058] Through the BDS unit, the satellite navigation information is processed through the baseband to obtain the position information and the PPS time slot;

[0059] Carry out navigation integrity verification on the position information and PPS time slot through the ADS-B interface unit, and send the verified position information and PPS time slot to the ADS-B message encoding unit;

[0060] The location information is encoded by the ADS-B message encoding unit according to the ADS-B message encoding rules to obtain the encoded message information, and the local time slot is randomly generated, and the synchronization signal is obtained by the ADS-B message encoding unit. When the current After the synchronization signal arr...

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Abstract

The invention discloses an aircraft signal transmission system, comprising a BDS (BeiDou Navigation Satellite System) antenna for receiving satellite navigation information, a BDS unit connected with the BDS antenna, an ADS-B (Automatic Dependent Surveillance-Broadcast) interface unit connected with the BDS unit, an ADS-B message coding unit connected with the ADS-B interface unit, a 1090ES radio frequency transmitting unit connected with the ADS-B message coding unit and a BeiDou transmitting unit. The system can realize whole airspace transmission within the coverage of a BeiDou satellite, so only one BeiDou ground command center for receiving message information is needed, no-blind zone and whole airspace coverage in the Asia-Pacific region can be realized at present, and the system can realize global no-blind zone coverage in the future with the global coverage of BeiDou; meanwhile, messages are transmitted by matching of a PPS (Pulse Per Second) time slot and a local random time slot to avoid transmitting interference, and RS coding is realized in a good message coding mode.

Description

technical field [0001] The invention relates to the field of aircraft positioning, in particular to an aircraft signal transmission system and a signal transmission method thereof. Background technique [0002] ADS-B (Automatic Dependent Surveillance-Broadcast) is an emerging surveillance technology recommended by ICAO in the new navigation system. It is an aircraft operation surveillance technology based on satellite positioning and ground / air data link communication. The aircraft position data of the equipment is automatically sent to the ground receiving and processing system in real time through the ground-air data link, so that relevant personnel can provide accurate and efficient monitoring services. [0003] The core technologies of the ADS-B system include: GNSS and ground-to-air / air-to-air data links. Throughout the world, most of the ADS-B GNSS signal sources currently used are GPS navigation signal sources, and only a few systems use Glonass as a backup navigatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18502H04B7/18506H04B7/18515
Inventor 林琳刘志勇刘引川周跃飞
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
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