Modeling And Simulation Of Passive Radar Seeker

With the continuous development of the radar defense system,the status of the anti-radiation missile has become increasingly prominent,and conventional combat missiles have gradually developed as the key weapons with detection and tracking ability.Therefore,the development of the passive radar seeker simulation system,theoretical verification,reliability verification and performance evaluation of the system become an important way to develop anti radiation missile.First of all,according to the simulation process of passive radar seeker system and the electronic reconnaissance model library,the overall design scheme of the simulation system is proposed.Then,the principle of each sub-model in the passive radar seeker simulation system is analyzed in details,and modeling them.The electronic reconnaissance model library mainly includes the simulation of radar signal,environment model,the measurement of signal parameters,the measurement of direction of arrival(DOA),intra-pulse feature analysis,the sorting and identification of the signal and so on.The simulation of radar signal mainly simulates the radar signal in the electromagnetic environment.In addition to calculating the time delay,the Doppler information and the environment gain,the environment model also calculates the real incident angle of targets which is used to restore the receiving signal of each array element of the antenna.The signal parameter measurement model is used to measure the arrival time of the pulse,the pulse width,the amplitude and the carrier frequency of the signal.DOA measurement model is used to obtain the high precision measurement of signal's azimuth and elevation by the two-dimensional linear interferometer.Intra-pulse feature analysis model accomplishes the recognition of intra-pulse modulation types of pulse.The above results measured for each pulse form a pulse description word eventually.Signal sorting is divided into pre-sorting and main sorting.The pre-sorting classifies the pulse sequence according to the pulse description word.the pulse repetition interval(PRI)is estimated in main sorting by the arrival time among the pulse description word,which is used to realize the de-aliasing of PRI fixed and jitter pulse trains.Finally,passive radar seeker simulation system is built and tested based on the electronic reconnaissance model library,the following simulation results and their explanation proving the correctness and validity of the system.The passive radar seeker simulation system introduced in this thesis has clear module with good compatibility and easy to modify and transplant,which can be used as a subsystem of the electronic warfare system.The thesis provides a reference for the simulation and application of passive radar seeker system,having great engineering significance and reference value.