Real-time amplitude comparison direction finding method and system based on beam amplitude pre-sorting

The invention discloses a real-time amplitude comparison direction finding method and system based on beam amplitude pre-sorting, and the method comprises the steps: carrying out the estimation and pre-sorting of a beam module value through I and Q data, carrying out the quantitative addressing of a beam amplitude difference, and finally carrying out the quantitative table look-up of a directional diagram through employing the obtained quantitative amplitude difference, and obtaining a real-time direction finding direction. According to the method, only the wave beam with the maximum module value is subjected to signal detection, the data processing rate is improved, meanwhile, the FPGA hardware resource consumption can be greatly reduced, and the real-time direction finding azimuth output of a target signal is smaller than 20 us. 本发明公开了一种基于波束幅度预分选的实时比幅测向方法及系统，利用I、Q数据对波束模值进行估计及预分选处理，进而对波束幅度差进行量化寻址，最终利用得到的量化幅度差进行方向图量化查表，得到实时测向方位。该方法只对模值最大波束进行信号检测，在提升数据处理速率的同时可大大减少FPGA硬件资源消耗量，目标信号实时测向方位输出小于20us。