Research On The Radar Reconnaissance Jamming System Based On Windband Digital Channelized Receiver

Traditional active jamming machine is used to transmit a proper jamming signal into the radar equipment of fixed frequency to detect the signal of the radar echo. However, with the development of modern new radar system, the jammer must be able to effectively jam multiple radars at the same time in order to meet the requirements of the modern complex electronic environment. Therefore, the radar reconnaissance and jamming system must have a high performance of radar reconnaissance equipment, which is used to reconnoitre enemy radar transmitting signal and monitor each frequency range of signal within a certain bandwidth in real time. It also can adapt to receiving the frequency-agile signal and guide the jammer to make the effective jamming measures according to different radar systems. So intercepted radiation signal is sent to the jamming system through the high-speed interface for further jamming decision, which is very important to study the characteristics and parameters of the system based on the channelized receiver. This paper mainly completes the following work:1、 Investigate the current status and trend of digital channel receiving technology, analyze the advantages of the channel receiving technology and its application.Understand the basic principle of the channel receiving algorithm. A channelized receiving system based on the uniform filter bank is designed, and the channel without aliasing is improved.The algorithm based on the instantaneous autocorrelation and the instantaneous frequency measurement algorithm based on cordic is studied.2、 The pulse modulation of several conventional signals is studied and analyzed, and the time-frequency features of several signals are analyzed with the instantaneous frequency measurement algorithm. A method of distinguishing the signal pulse by the instantaneous frequency characteristic is designed, and then obtained the PDW of pulse signal.3、 The jamming technologys and characteristics of modern radar are studied. The working principle of two kinds of common radar systems are understanded. Then in theory, the effective jamming modes are analyzed and the simulation results are given.Finally, design the overall radar reconnaissance and jamming system base on the digital channelized receiver. The each function of the design structure is briefly described and algorithm simulations of system are presented. The aspects of the application are put forward.