A Drfm-Based Method for Generating Interference Signals of Radio Altimeter

Abstract

The invention discloses a radio altimeter interference signal generation method based on DRFM technology. The method uses DRFM-based data cycle storage and read-write signal delay precision control technology to generate a distance deception interference signal for the altimeter; adopts DRFM-based Advanced digital noise modulation technology to generate radio frequency noise interference signals to the altimeter; use DRFM-based data cycle storage and digital convolution filter technology to realize the generation of false target interference signals to the altimeter; use DRFM-based frequency shift interference technology , realizing the generation of the distance-velocity synchronous interference signal to the altimeter. The altimeter interference signal generated by the above methods can meet the requirements of the anti-jamming performance test of the anti-ship missile radio altimeter. This technology has been applied to the general radio altimeter device developed by the Academy of Naval Aeronautical Engineering, and two types of radio altimeters have been tested to verify the correctness of the method. The radio altimeter interference signal generated by the invention is not only suitable for the radio altimeter onboard, but also can be popularized and applied to the radio altimeter on board.

Description

technical field [0001] The invention relates to a method for generating a radio altimeter interference signal based on DRFM, and belongs to the technical field of equipment testing. It is mainly used to generate interference signals to radio altimeters of various systems, and to measure the anti-jamming performance of altimeters. Background technique [0002] The research on anti-interference technology and interference signal generation technology of radio altimeter started relatively late in our country. The altitude signal simulator used in the domestic ballistic altimeter performance test has successively adopted the equivalent cable box scheme, the surface acoustic wave delay line scheme or the optical fiber delay line scheme, none of which can superimpose interference information on the altitude signal, so it is impossible to measure Anti-interference performance of the altimeter. Therefore, the research on altimeter anti-jamming technology urgently needs to solve th...

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Problems solved by technology

The altitude signal simulator used in the domestic ballistic altimeter performance test has successively adopted the equivalent cable box scheme, the surface acoustic wave delay line scheme or the optical fiber delay line scheme, none of which can superimpose interference information on the altitude signal, so it is impossible to measure Anti-interference performance of altimeter

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