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Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system

An interference suppression and self-adaptive technology, applied in the field of civil aviation ground-air communication, can solve the problem that the civil aviation ground-air communication interference cannot be eliminated in essence, and achieve the effect of eliminating external constant modulus interference, improving the signal-to-interference ratio, and solving the interference problem.

Inactive Publication Date: 2010-07-21
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

Neither of these two technologies can essentially eliminate interference in civil aviation ground-to-air communications

Method used

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  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system
  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system
  • Civil aviation ground-air communication self-adaptive disturbance restraining method based on the constant mode array and its system

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Embodiment Construction

[0025] The specific embodiments of the civil aviation ground-to-air communication adaptive interference suppression method and system based on the constant modulus array of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The method of the present invention fully considers that the ground-air communication system is rarely subjected to two or more interferences at the same time. In addition, the noise power is much lower than the power of the interference and useful signals and can be ignored, so a dual-channel receiving system is adopted. Starting from the statistical independence of the interference signal and the useful signal, the adaptive suppression of interference is realized by processing the signals received by the two receiving channels. Specifically, using figure 1 The civil aviation ground-to-air communication adaptive interference suppression system based on the constant modulus array shown to adaptively s...

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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 lasting model array, including the following steps: translate the bi-aerial wire array received two path high frequency amplitude modulation signals into the medium frequency signal; and carries on data capture and analog-to-digital convert; carries on the digital down-conversion filtering drawoff; sends the drawoffed signal into the monitoring model to judge, if no interference into the demodulation, has the interference to enter the interference signal drawoff; sends the interference signal into the self-adapting lasting model interference suppression module to drawoff the interference signal and self-adapting cancellation; demodulates the state no interference signal and filters the high frequency noise to carry on D / A conversion output. Under no reference signal premise, the invention separates out the groud air communication useful signal of using the lasting model blind signal processing technogy and the self-adapting interference cancellation technogy, removes the flight safety hidden danger, outputs the high quality pronunciation signal, enhances the flight safety coefficient, achieves the goal of taking stopgap measure and effect a permanent cure.

Description

Technical field [0001] The invention relates to a civil aviation ground-to-air communication method. In particular, it relates to a civil aviation ground-to-air communication adaptive interference suppression method and system based on a constant modulus array that can improve the quality of civil aviation ground-air communication, ensure flight safety, and can also be used in other communication systems to improve reception performance. Background technique [0002] Civil aviation VHF (Very High Frequency) ground-to-air communication plays an important role in the air traffic management system, and its stability and reliability directly affect flight safety. The VHF ground-to-air communication station adopts DSB-AM (double-sideband amplitude modulation with carrier) and half-duplex communication. The working frequency ranges from 118.0MHz to 136.975MHz, the channel interval is 25KHz, and it can provide 760 communication channels. The channel can be multiplexed in a wide area. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04B7/04H03G3/34
Inventor 吴仁彪马健丽王淑艳胡铁乔钟伦珑黄建宇石庆研
Owner CIVIL AVIATION UNIV OF CHINA
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