The Research Of The Important Technologies Of Signal Processing In Anti-radiation Radar System

Anti-radiation radar is an important tool for target recognition and location.It mainly undertakes tasks such as screening,azimuth measurement and track tracking of target radar radiation sources.In this dissertation,some important technologies of signal processing in anti-radiation radar system are researched.The design and discussion of the signal processing are carried out from three aspects: signal sorting algorithm used for radar pulses,the technology of direction of arrival estimation in polarization sensitive array and the implementation of signal processing platform.The first part of this dissertation is a research on signal sorting algorithm used for radar pulses.In this part,the characteristics of inter-pulse modulations and common signal sorting algorithms are analyzed firstly.The advantages and disadvantages of the algorithms are discussed in detail.Finally,a set of algorithm process of signal sorting based on the improved PRI transform and the SDIF is designed for the actual EM environment is proposed.We use some simulation data is to verify the applicability of the proposed process.The results show that our algorithm can sort the complex pulse signals correctly.Therefore,the process has some good application.The second part of this dissertation is based on the technology of direction of arrival estimation in polarization sensitive array.In this part,the form of the received signal from the polarization-sensitive antenna array is discussed.The analysis method of the conformal antenna array is discussed.The theory and performance of several algorithms of direction of arrival estimation in polarization sensitive array are introduced.The third part of this dissertation is about the specific implementation technology of signal processing platform in radar system.In this part,combined with the actual working requirements of radar,the PCB board and the process of signal processing are designed in detail from two aspects: algorithm flow and hardware resource allocation.Finally,this dissertation shows the actual test environment and the performance of anti-radiation radar.Then briefly analyzes the experimental results.