Radar Signal Analysis And Research On Hardware-in-the-loop Simulation

HFSW radar needs to set the signal parameters to meet a variety of tactical indicators.The transmit signal should have a large un-ambiguity range in order to avoid the ionosphere folding clutter interference.FMICW is a kind of signal form in the HFSW radar,it can solve the problem of receiving and isolating in radar system.However,due to the truncation of the rectangular pulse,its conventional signal processing method will bring the target distance ambiguity.For the long-distance folding echo problem,only by increasing the pulse repetition period will bring the loss of the average power transmission,affect the distance of the radar system.So we need to according to FMICW its own characteristics and external battlefield environment to choose the appropriate processing and waveform design methods that solve the current problem.For the performance of waveform design and algorithm,the traditional verification method has the advantages of long cycle and costly.It is helpful to verify the effectiveness of the algorithm quickly by studying the hardware-in-the-loop simulation system of radar signal processing.the main research as follows.This dissertation starts with the FMICW signal and gives the basic form of the FMICW signal,then studies the basic theory of radar target information extraction and draws the conclusion that the conventional signal processing under the FMICW signal system brings the distance ambiguity.Further method of solving the distance ambiguity is analyzed and studied.Firstly,the FMICW signal based on signal design is studied.The basic parameter setting in radar system are given.According to the characteristics of orthogonal coding,the basic theory in echo signal processing with phase coding signal is studied.The orthogonal algorithm design optimization algorithm based on genetic algorithm and algebraic method is studied.Then,mainly research and design the software platform in radar signal simulation system.From the overall design of the software system and the various modules to determine the framework of the software platform.Using C# and MATLAB mixed programming to achieve signal waveform editing and signal download,using SCPI and.API interface functions to achieve Waveform verification and signal acquisition.Finally,the performance and functions of each hardware module are studied.According to the radar waveform synthesis technology and signal generation technology to build the hardware-in-the-loop hardware platform.Then complete theanalysis of the signal and the validation of the previous algorithm to prove the feasibility of this algorithm.This dissertation studies the semi-physical simulation test method based on System Vue.