导航卫星阵列天线的快速现场系统校准算法

阵列天线接收处理全球卫星导航信号时，由于天线和射频前端的非理想性，会在不同方向卫星信号中引入不同的载波相位偏差，从而破坏卫星导航接收机距离观测量准确性。针对此问题，提出了一种易实现的卫星导航阵列天线的快速现场系统校准算法。校准过程分为通道校准和天线校准：通过开机和周期进行的通道校准实现阵列天线接收射频前端的通道响应测量；通过与接收处理不同卫星基带数据的数字接收机配合，实现阵列天线的现场阵列流形矢量校准。仿真验证了所提校准算法的正确性和有效性。

Fast field array manifold calibration for GNSS antenna arrays

The reception of Global Navigation Satellite System(GNSS) signal is susceptible to the anisotropic response of the array antennas and non-ideality of radio frequency frontend. The different code or carrier phase biases of different satellites introduced by the antenna array and the frontend will break the assumption of positioning principle and prevent precise location. To solve the problem,an implementable fast field array manifold calibration algorithm is proposed for GNSS antenna arrays,including channel calibration and antenna calibration. In channel calibration step,the frontend channels'' responses are measured when powered on or periodically measured during running. In the antenna calibration step,the compound field array manifold is measured with live satellite signals and the measurements from the digital GNSS receivers. Combined the two steps,the net antenna array''s manifold can be separated. Simulations verify the correctness and performance of the calibration algorithm.