Study Of The Detecting And Jamming Integrated Signal Base On SAR

In the modern warfare,the radar detection system is indispensable,as well as the reconnaissance and jamming system.The radar equipment is mainly responsible for detecting,positioning and tracking target,which has the characteristics of long distance and high positioning accuracy;The reconnaissance and jamming equipment is mainly responsible for scouting,identifying and interfering of the radiation source,which is the main means to prevent the enemy radar from obtaining information and obtaining the enemy's information.However,on the traditional combat platforms,the radar equipment and the jamming devices are often independent from each other,resulting in a series of problems,such as the waste of space resources,the poor electromagnetic compatibility,and the huge system size.Therefore,in order to solve these problems,the research on the integrated system of detective work is put on the agenda.There are two stages in the research of the integrated system.The first stage is the idea of the integration based on the hardware,that is,the radar equipment and the jamming equipment are fused together as much as possible on the hardware level.The second stage,in order to complete the further combination,the design uses a combination of jamming and detecting shared signal on the basis of the hardware sharing,which makes the spectrum can get more efficient utilization of resources.In this paper,the design of the integrated signal for SAR will be studied.First of all,this paper discusses the current development status of the jamming and detecting integrated signal at home and abroad,and analyzes and compares the deficiencies and problems existing in the integrated signal technology.Then,in order to solve these existing problems,we devise two jamming and detecting integrated signals by the coherent interference technology under the common mechanism,respectively for integration of jamming convolution modulation signal and the integration of sinusoidal frequency modulation signal.After obtaining the LFM signal transmitted by SAR,the jamming signal makes the additional corresponding modulation,which can create the noise convolution interference or sinusoidal frequency modulation interference.This two kinds of interference signals are able to pass the SAR receiver successfully by obtaining the two-dimensional matching gain,so as to realize the suppress interference or deception interference of SAR.On the other hand,after the jammer receives the jamming signal echo,the echo of noise convolution interference signal gets the bleaching process in the frequency domain,or the sinusoidal frequency modulation jamming signal selects suitable modulation parameters,which will be able to make these two kinds of jamming signal have certain detecting performance.The study proves that the integration of the two signals can satisfy the jamming and detecting integrated signal's demand based on SAR.In addition,this article using the sinusoidal frequency modulation signal as the basic signal model,has designed two kinds of signals respectively in time-division multiplexing mechanism and frequency division multiplexing mechanism.These two kinds of signals have been processed in the detecting simulation and jamming simulation.Through the analysis of simulation results we find that both signals have good detection performance and jamming performance.The detecting and jamming integrated signal research in this article solves the existing noncoherent integrated signals' problem,which is unable to get the radar's two-dimensional processing gain.The detecting and jamming integrated signal research based on SAR has provided a certain reference value.