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.
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[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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