Implementation method for preventing forwarding interference of frequency modulation radio fuze

Abstract

The invention provides an implementation method for preventing forwarding interference of a frequency modulation radio fuze and aims to provide a digitalized interference prevention fuze implementation method with which triangular wave frequency can be flexibly adjusted, fuze operating distance can be changed, and forwarding interference prevention capacity of fuze equipment can be improved. The implementation method is realized by the following technical scheme. A triangular wave generator formed by a triangular wave frequency control word, an N-bit phase accumulator, a data bit cut processor and a triangular wave phase lookup table in sequence and a BPSK (Binary Phase Shift Keying) modulator crosslinked between a balance GOLD code generator and a digital-to-analog converter are designed in a programmable gate array chip FPGA (Field Programmable Gata Array). After the triangular wave generator frequency is given, the computational formula of the triangular wave frequency control word is adopted in the DDS triangular wave generator. The calculated triangular wave frequency control word is sent to the N-bit phase accumulator to be accumulated, the lower 18 bits of the data are cut and the higher 14 bits of the data are maintained. The data is sent to the triangular wave lookup table, and phase-to-range conversion of triangular wave signals is achieved.

Description

technical field [0001] The invention relates to a fuze digital realization method which can flexibly change the fuze action distance and improve the anti-transfer interference ability in the frequency modulation continuous wave radar system (FMCW) fuze equipment. Background technique [0002] At present, my country's fuzes mainly include radio fuzes, electromechanical fuzes, and laser fuzes, and radio fuzes are proximity fuzes that use radio waves to obtain target information. Command, so that missiles and other ammunition detonate the warhead at the best explosion point to increase lethality. Radio fuzes can be divided into Doppler type, frequency modulation type, pulse modulation type and so on according to different working principles. The FM radio proximity fuze has been widely used in practical engineering applications due to its advantages of high precision in short-distance measurement and easy implementation. However, for a long time, radio fuzes have been using rad...

AI Technical Summary

Problems solved by technology

However, in order to ensure the reasonable selection of fuze system parameters, there are great limitations on the change of fuze transmission power, signal bandwidth, antenna beam width and blanking time

Therefore, the fuzzy distance of the radio fuze realized by the analog system is usually only a few hundred meters, and its anti-transfer interference performance is not good.

[0005] At present, for the radio fuze modulated by triangular wave, when the beating frequency and radio frequency modulation bandwidth are determined, to change the fuze action distance, the triangular wave modulation frequency must be changed. However, the triangular wave modulation frequency is difficult to adjust, and a flexible fuze action must be realized. Distance adjustment is almost impossible

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