The Study Of Key Technologies Of Air-to-ground Missile-borne MMW Radar Of Compound System

When air-to-surface missiles strike low-speed moving targets on the ground, targets should bedetected and tracked from the background clutter. In order to distinguish the type and property oftarget at the same time, the target must be classified and identified by radar. Because the millimeterwave has advantages such as small antenna, narrow beam, large bandwidth, good lateral resolution,large Doppler shift and good anti-stealth performance, millimeter-wave radar guidance technology iswidely applied in the air-to-ground missiles. Millimeter-wave guidance radar usually uses pulseDoppler system and high-resolution imaging system. This thesis studies how pulse Doppler systemand high-resolution imaging system are compounded reasonably and effectively by radar to improvethe performance and accuracy of the missile tracking targets in the horizontal range of6km away fromthe goal.After studying the basic working principle and signal processing method of pulse Dopplersystem and high-resolution imaging radar, this thesis summarizes advantages and disadvantages of thetwo systems and their application occasions. It points out the necessity to composite the two systems.In the study of HRRP movement compensation of stepped frequency radar, the paper describes acompensation method based on staggering PRT in different pulse groups. After comparing with thetime-domain correlation method and the positive and negative frequency modulation method, theresults show that the method of staggering PRT in different pulse groups is more suitable forcomposited velocity compensation with PD.The paper studies how to use high resolution radar to suppress Angular Glint and to increasedistance measurement accuracy as well as how to use the method of staggering PRT in different pulsegroups with the velocity measurement of PD to complete composite velocity compensation. On thebasis of corresponding simulation and analysis, the paper elaborates the search scanning program andthe parameters design of composite work with PD radar and stepped frequency radar as well as thedesign of waveform parameters and the signal processing method under different composite trackingstages. Then, it presents a complete working program of composite systems. This program combinesthe advantages of these two systems. On the one hand, it makes the radar easy to classify andrecognize the target. On the other hand, the distance, velocity and angle measurement and trackingaccuracy of the radar are improved.In this paper, the working program of the radar composite system has guiding significance for the design of actual radar hardware and software system. A detailed design of the radar hardware andsoftware system is given at the end of the article. The data storage capacity and computing speed ofsignal processing are analyzed which indicate that the working program of the composite radar in thispaper can be realized.