An Optimization Method for Array Direction Finding Based on Beamforming Coefficient Comprehensive Design

A comprehensive optimization method to improve the direction finding accuracy at the edge of covered airspace in phased array system is proposed. Due to the variation of beam width which caused by the array scanning, this method first uses the spatial resampling strategy to design the digital beam weighting coefficients with constant beam width. Then, the beam coverage under high elevation is further optimized to improve the direction finding accuracy with the consideration ofelevation scanning scenario in practice. The simulation results show that the comprehensive optimization method can reduce the direction finding error effectively, especially at a high elevation scene.