Civil aviation ground-air communication self-adaptive disturbance restraining method based on the extraction of the blind signal and its system

A communication interference and interference suppression technology, applied in modulation carrier systems, transmission systems, digital transmission systems, etc., can solve problems such as equipment waste, and achieve the effects of simplifying complexity, improving receiving performance, and high signal-to-noise ratio.

Inactive Publication Date: 2007-09-12
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

This technology has the same effect as the above-mentioned automatic dependent surveillance system of the VHF data link, both of which can guarantee the normal progress of ground-air communication to a certain extent, but neither can remove the interference in essence, and both cause serious waste of equipment

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  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the extraction of the blind signal and its system
  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the extraction of the blind signal and its system
  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the extraction of the blind signal and its system

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Embodiment Construction

[0031] The civil aviation ground-air communication interference suppression method and system based on blind signal extraction of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The civil aviation ground-air communication interference suppression method based on blind signal extraction of the present invention uses the civil aviation ground-air communication adaptive interference suppression system based on blind signal extraction shown in Figure 1 to self-adaptively suppress interference in ground-air communication, and the specific steps as follows:

[0033] The first step is to convert the two VHF signals received by the dual-antenna array into IF digital signals. The signals received by the array antennas 1 and 2 pass through a radio frequency processing group composed of a low-noise high-frequency amplifier, a three-stage mixer and an automatic gain control circuit (the dotted frame p...

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Abstract

The invention relates to civil aviaton groud air communication self-adapting interference suppression method and its system based on the blind signal, including the following steps: translate the bi-aerial wire array received two path high frequency amplitude modulation signals into the medium frequency digital signal; and carries on the orthogonal transform after filter drawoff; changes the fact signal to the plural signal; judges the plural signal whether or not is subjected to interference, if no interference change into the six step, but change into the five step; the interference signal carries on blind extraction and cancle the signal; the one of the signal from the step four or step 5 carries on demodulate, and then filtered the high frequency noise. The invention no need uses any reference signal, using the blind self-adapting signal processing method can eliminate the interference which has a strong impact on the broadcasting station receptivity. The strong usability can suppress any form interference; and also can uses in the other communication systems, enhances the receptivity.

Description

technical field [0001] The invention relates to a dual-channel self-adaptive interference suppression method for civil aviation ground-air communication. In particular, it relates to a civil aviation ground-air communication interference suppression method and system based on blind signal extraction that improves the quality of civil aviation ground-air communication and ensures flight safety. Background technique [0002] Civil aviation ground-air communication plays an important role in the air traffic management system, and its stability and reliability directly affect flight safety. [0003] According to the provisions of Volume I of Annex 10 of the International Civil Aviation Organization Convention, in air traffic control, the contact between ground controllers and air pilots mainly depends on VHF (very high frequency) ground-to-air communication stations, and the stations use DSB-AM (with carrier Double-sided band amplitude modulation), half-duplex communication, it...

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Application Information

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IPC IPC(8): H04B1/10H04B7/04H04L27/00
Inventor 吴仁彪石庆研王淑艳马健丽胡铁乔钟伦珑黄建宇张兴媛
Owner CIVIL AVIATION UNIV OF CHINA
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