Research On Key Techniques And Engineering Application Of Experimental Jamming Source System For Pseudo-random Code Phase-modulation Fuze

Pseudo-random code phase-modulation ( PRCPM ) fuze is applied widely in aeronautical missile and SAM, so how to jam this fuze is very necessary to study. The engineering application of experimental jamming source system for PRCPM fuze is mostly studied in the paper. The aim of research is to provide experimental platform for studying jamming and anti-jamming techniques of the fuze in the laboratory, develop radio fuze jammer for PRCPM fuze and meet the development requirement of military equipment. So it has the widely martial application prospect. This dissertation is an important part of certain national defense project. And some key techniques of the system of experimental jamming source for PRCPM fuze are studied.(1) The system scheme of experimental jamming source for PRCPM fuze is put forward. It includes mainly that jamming mode, receiver sensitivity and jamming power of experimental jamming source. The jamming principle of deception jamming and suppressing jamming for PRCPM fuze is studied.(2) The demodulation technique of PRCPM fuze signal is studied. Firstly, jamming receiver searches and catches PRCPM fuze signal. A fixed intermediate frequency signal is obtained by swept oscillator signal mixing with carrier frequency of PRCPM fuze signal. Then the fixed intermediate frequency signal is demodulated by use of Costas loop. The locked indication module outputs the locked signal when pseudo-random code sequence is obtained. The locked signal is then sent into frequency controlling circuit, which makes the swept oscillator stop sweeping and locks the frequency of oscillator, which is used by modulation circuit.(3) The hardware circuits of deception jamming for PRCPM fuze are implemented. The working principles and hardware implementation of the important parts are resolved. These include mainly recognition and reconstruction of pseudo-random code sequence, modulation and transmission of jamming waveform and so on. Finally, the real-time and effective performances of the whole system are analyzed.(4) The hardware circuits of narrowband suppressing jamming for PRCPM fuze are implemented. The working principles and hardware implementation of key circuits of the scheme are resolved. The circuits include mainly recognition of demodulated code, the generation of the same frequency clock and pseudo noise, modulation and transmission of jamming waveform and so on.(5) The hardware circuits of spot and noise FM jamming for PRCPM fuze are...