The Interrupted-Modulation Radar Signal And Its Application

As electronic countermeasures increasingly fierce in the modern war,radar by the threat of enemy electronic jamming is more and more serious.In order to protect the battlefield survivability of the radar,improve the anti-jamming ability and low intercept performance of radar is the main development direction of modern radar technology.Among them,the radar signal influence not only on the target detection accuracy and resolution,also directly affect the radar anti-interference ability and low probability intercept performance,therefore design and optimization of radar signal is the key technology to improve radar system's comprehensive performance,which make the radar waveform design becomes more and more important research subject.This paper takes example by interrupted-sampling and repeater jamming of "interrupted sampling" thought,radar interrupted-modulation signal waveform design method is proposed,and its performance is studied.The main content of the research can be divided into three parts:(1)The basic principle of design method of radar interrupted modulation signal.Firstly introduces the basic principle of interrupted modulation,and then using periodic pulse sequence modulated signals to get interrupted-modulation signal,through the fuzzy function of modulation signal analyzing the resolution of the performance before and after,the on-off coding method to interrupted modulation signal was designed,and analyzes the on-off coding-interrupted modulation signal resolution performance and influencing factors.(2)Research on the method of interrupted-modulation signal processing.Through theoretical derivation of matched filtering interrupted-modulation signal processing,then according to different application scenes,study on signal processing respectively.Time-domain add window in a RF simulation anechoic chamber to get real target information,;On the other hand,segmented matched filtering points signal processing method is put forward,according to the linear frequency modulation slope to choose the appropriate interval modulation cycle to achieve the best matched filtering processing.(3)Research on the application of interrupted-modulation signal.First build the basic model of radar RF simulation anechoic chamber,though the pulse interval transceiver effectively solve the problem of mutual coupling of antenna,and then the simulation of radar reconnaissance receiver front intercept probability and the signal sorting identification probability of interrupted-modulation signal and linear frequency modulation signal,the interrupted-modulation signal is proved a better low intercept performance.