Reaseach On Doppler Effect To Anti-RGPO

An important characteristic of modern military is that the radio technology is applicated more extensively in many weapons and equipments.Various weapons and equipments power exerting,theater surveillance and alert,coordinated operations of the various arms of deployment,the associated,command and control,are more and more dependent on the effect performance of the radar.Counterwork of radar is the main part of electronic warfare.It's main operational object is radar.Through electronic measure,the deployment of military is discover,the technical parameters of enemy's radar,weapon platforms with radar,radar-guided weapon systems is know. Use the measures like electronic jamming,electronic deception and electronic attacks, The operational efficiency of enemy's radar is weakened even undermined.Radar jamming is a general designation of tactical and technical measures that can damage enemy's radar to detect our target's information.There is an effective jamming that the aircraft use in common to the radar is named "the range gate pull off jamming".It is an important way through which the aircragt jamming the planes on the tracking radar on the ground in martial interferences.Discussion on how to eliminate "the range gate pull off jamming" is very important and necessary to keep the radar's normal work and improve the viability of the radar.It's the issue that be studied deeply and extensively by the staff engage the electronic war and anti-jamming.The thesis first recerched the working precess of the range tracking circuit in radar's receiver and elaborated the principle of the range gate pull off jamming.Then recerched deeply the current technology and measures used to resist "the range gate pull off jamming";and at last analyzed the Doppler effect of the aircraft's echo signal and the range gate pull off jamming signal that the radar's receiver received;found they have different Doppler shifts,regarded the difference as the characteristic;Used an practical example to counted they margin of Doppler shift.Finally,according to this dissimilarity,the possibility of eliminated the jamming is analyzed and a new method is put forward:Doppler effect is used to resist the range gae drag jamming. and gived the conditions of application.The method adopted a conversion circuit or an installation circuit in the radar's receiver.The circuit can detect,record,transform the signal that the radar received. And then made the radar's receiver deal with the real signal and the jamming,and eliminated the jamming.