The Typical Radio Fuze Signal Recognition Based On Virtual Instrument And Interference Technology Study

The methords and basic theory of realiaze the radio fuze jamming is introduced in thethesis,and modulation recognition, modulatory parameter recognition, transmit jammingsignal are also researched. All those fuctions are realized by LabVIEW7.1 based on the NIvirtual instument.The precondition of jam the fuze is acquireing the fuze signal which is unknow. Inthis thesis, searching reciver is used to acquire the center frequency, frequency bandwidthof the unknow fuze signal, and down convert to fixed interim frequency.Modulation recognition and mudulation paremeter recognition is an important part offuze jamming. Auto recognition of DSB, FM, 2ASK, 2PSK, 2FSK, LFM(LinerFrequency Mudulation), PRCPM(Pseudo Random Code Phase Modulation) is researched,and programming model which is able to recognize the mudulation type is developed. Theinfection of recognition of doppler signal is discussed, and emulational analyze isdeveloped.The core of jamming is transmitting jamming signal,which is also the most importantpart of the paper. The production and trasmitting of the jamming signal based on the flatare researched in chapter five. Reconstructed modultion signal is cycle delayed as ajamming source. Doppler signal is used to mudulate the IF signal, finally,the IF signal isupconvert to RF(Radio Frequency) to transmit in order to jamming the fuze. The circuit isdesigned and developed to prove the feasibility of the jamming based on the virtualinstrument.