Modulated Digital Radio Frequency Memory-based Interference

In the modern war , the conventional weapon of destruction is not the only leading actor , holding the initiative of the electronic warfare often decides the warfare's initiative . Radar countermeasure is a essential part of the electronic warfare . The modern science and technology development has caused a revolution in the field of the electronic warfare, including the radar countermeasures . The radar countermeasure based on the technology of Digital Radio Frequency Memory (DRFM) , which has the develop in the near 10 years , is the best jamming fashion of the countering the modern radar .With the use of traditional frequency memory , the fee is very costly ,and it is difficult to store the modern coherent radar signals and jam it effectively . However , DRFM is a kind of microwave signal storage system , in some certain conditions , the jammer using the technology of DRFM can save the dangerous radar signals long-playing , accurately and integrallty ; because of the high performance A/D and D/A based on high frequency clock , the signals which have been saved have frequency precision , even attained Hz level ; because of saving high coherent radar signals , the jammer can achieve the cheating jamming of coherent radar ; because of the capability of saving some kinds of the coherent radar signals , it can achieve the imperceptibly analyse of the storing signals ; according to program the logic memory , it can achieve adaptive jamming . Because DRFM has these advantage , it becomes the indispensability technology of the ECM system .This dissertation mainly takes reseacrh works as follows:1. Analyzing the characters of the radar signal processing and radar jamming technology in theory , and analyzing the relationship of them .2. From the point of application , this paper also describes the principle of DRFM system.3. Based on Analyzing cheating jamming in theory , this paper studies the technology of cheating jamming based on DRFM . 4. Based on Analyzing suppressing jamming in theory , this paper studies the technology of suppressing jamming based on DRFM .5. According to study the parts of the the principle of DRFM system , this paper studies the DRFM's discrimination and disadvantage.