DRFM (digital radio frequency memory)-based jamming signal generation method for radio altimeter

Abstract

The invention discloses a DRFM (digital radio frequency memory)-based jamming signal generation method for a radio altimeter. The method comprises the following steps of generating a range deception jamming signal for the altimeter according to the DRFM-based data circulating storage and read-write signal delay accurate-control technology; generating a radio frequency noise jamming signal for the altimeter according to the DRFM-based digital noise modulation technology; generating a false target jamming signal for the altimeter according to the DRFM-based data circulating storage and digital convolution filter technology; generating a range-speed synchronous jamming signal for the altimeter according to the DRFM-based frequency-shifting jamming technology. According to the method, the generated jamming signals for the altimeter are integrated to meet the requirements of anti-jamming performance tests of the radio altimeter of an anti-ship missile; the technology is applied to a universal radio altitude simulation device developed by the Naval Aeronautical Engineering Academy to finish testing two types of radio altimeters and verify the accuracy of the method; the radio altimeter jamming signals are applied to a missile-borne radio altimeter, and can also be popularized to an airborne radio altimeter.

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...

AI Technical Summary

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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