UAV Passive Location System to Maneuvering Target Based on Phase and Doppler Frequency
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Due to the shortcomings of small combat area,low accuracy,slow tracking convergence speed from the traditional UAV location system based on angle information,a new passive location and tracking method combining Doppler frequency and phase difference rate of change was proposed.Considering the different moving state from the target,the model was deduced and analyzed.After that,the MVEKF algorithm was introduced to do the filter processing.Changing the speed of target,the result was compared.It was demonstrated that with the combining of Doppler frequency and phase difference information,the location and tracking method decreased the influence from the precision of UAV navigation equipments and the unknown initial state of the target,availably improved the location accuracy and stability,broaden the task scope of UAV airborne platform.