Continuous wave chaos phase-modulation radio fuse detection system and demodulation method

Abstract

The invention provides a continuous wave chaos phase modulation firebird detecting system, especially a continuous wave chaos phase modulation firebird detecting system implemented based on the generation of modulation signal of FPGA and the quick digital correlative demodulation arithmetic of signal after modulating. The system comprises chaos code generator, retarder, radio frequency oscillator, directional coupler, phase modulator, circulator, aerial, mixer, automatic gain control amplifier, correlator and signal detecting part. The invention has important application value in aspect of realizing fuze anti-interference. The system not only can make the fuze with very perfect distance, speed resolution and distance measurement, distance measurement accuracy, but also with better anti-capturing performance due to diversity and initial value sensitivity of generating method of chaos signal.

Description

technical field [0001] The invention relates to a radio fuze detection system, in particular to generation of FPGA-based modulated signals in a continuous wave chaotic phase-modulated radio fuze detection system and realization of a fast digital correlation demodulation algorithm for modulated signals. Background technique [0002] With the increasingly complex electromagnetic environment of the modern battlefield, the detection performance and anti-interference ability of the radio fuze directly determine whether the warhead equipped with the radio fuze can fully exert its combat effectiveness. [0003] The anti-interference ability and detection performance of radio fuzes are inseparable from the waveform modulation of the fuze. Driven by the needs of the battlefield environment, the waveform modulation methods of radio fuzes are becoming more and more complex. From the perspective of development trend, radio fuzes are increasingly inclined to use wider bandwidth, higher f...

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Problems solved by technology

[0004] Although the pseudo-random code fuze widely researched and applied at present also utilizes the m-sequence or Gold sequence with pseudo-random characteristics as the modulation signal, the correlation characteristics of this pseudo-random code are not very ideal, the number of sequences that can be obtained is small, and the cryptographic strength is low, and Due to the generation method, the length of the sequence period is not easy to make too long

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