Design Of Multi-mode Radar Echo Signal Simulation Software

There existing many non-ideal factors in missile-borne radar echo data,which brings great challenges to the stability of the missile-borne radar signal processing algorithm.In addition,recording actual echo data is expensive.Thus,echo simulation is a very important way to obtain the echo data.In the preliminary design of missile-borne radar system,it's necessary to develop missile-borne radar echo simulation software,based on the actual trajectory and the real scene image.The generated echo can provide effective test data to the subsequent signal processing,image matching and locating,and etc.This thesis mainly focuses on the study of missile-borne radar echo simulation technology,and the design of the multi-mode radar echo simulation software based on QT platform.A multi-mode radar echo simulation framework is proposed,and a parallel optimization method combining multi-thread technology and Open MP is designed,which significantly improves the computational efficiency.This thesis aims at the design of a multi-mode radar echo simulation software,and is innovative in the following aspects:(1)Characteristics of the missile platform in different flight stages are analyzed.Synthetic aperture radar isometric concentric echo simulation algorithm is adopted in straight track and descending section.To avoid forward-looking SAR blind area,monopulse radar echo simulation method is used at track terminal to realize target searching and tracking when the missile is approaching the target.A highly integrated multi-mode radar echo simulation algorithm framework which covers the whole trajectory is constructed;(2)A program optimization method combining the thread pool and Open MP is proposed,based on the QT platform,through the detailed analysis of the fixed multi-thread,thread pool and Open Mp models.This method can adjust the thread allocation,according to the computer performance and task burden,to achieve the best optimization results and improve the efficiency of the simulation algorithm.(3)According to the principle of software design,the echo simulation software is designed and implemented based on the multi-mode echo simulation algorithm framework and the parallel optimization scheme,which can improve the reliability,robustness,modifiability,robustness,modifiability,comprehensibility,operability,efficiency,expandability of the multi-mode echo simulation software.The output simulated echo data can be used for the development of radar signal processor and performance evaluation,which can provide powerful reference for the design of the radar,also it can be used for performance evaluation of the radar imaging system,and the assessment of the effectiveness of imaging algorithm.