低复杂度的ADS-B抗干扰阵列天线无源校正算法

Low complexity passive calibration algorithm for ADS-B anti-jamming antenna arrays

阵列的幅相误差、位置误差和互耦使真实阵列流形与理想阵列流形有较大偏差,校正这3种误差可以明显提高阵列的性能。针对广播式自动相关监视(automatic dependent surveillance-broadcast,ADS-B)系统,提出了一种同时校正上述3种误差的无源校正算法。通过阵列天线的位置和飞机位置获取校正源的来向信息,并利用该来向信息最终进行误差校正。与其他方法相比,所提方法大大减少了校正阵列的复杂度。仿真结果表明了该算法的有效性。

The real array manifold and the ideal array manifold may be different due to the gain and phase error,position error and mutual coupling of the array,and these errors need to be calibrated to improve the performance of the array.A passive calibration algorithm is proposed to calibrate the gain and phase error,position error and mutual coupling of the array in the automatic dependent surveillance-broadcast（ADS-B）system.In the proposed method,ADS-B signals broadcasted by the ADS-B system are used as the pilot sources,and the pilot sources do not need to be set manually.The direction of arrival of the pilot sources can be obtained according to the position of the array antennas and the position of the aircrafts,and the errors of the array are finally calibrated by using the direction information.Compared with other algorithms,the proposed method greatly reduces the complexity of the array calibration.The simulation results show the effectiveness of the proposed algorithm.