GNSS自适应天线阵的相位中心误差研究

Study on phase center error of GNSS adaptive antenna array

为尽可能降低GNSS自适应天线阵相位中心变化引入的定位误差,提出了一种计算理想天线阵相位中心的方法。首先,分析了阵列天线模型及其方向函数;然后,结合其定义与方向函数的关系推导了相位中心的算法。仿真结果表明:加自适应算法后,相位中心的误差可以达到分米级,但在高精度应用时必须加以修正,验证了该算法的有效性。

In order to minimize the positioning error introduced by the phase center variation of the GNSS adaptive antenna array,a method for calculating the phase center of the ideal antenna array is proposed.Firstly,the array antenna model and its direction function were analyzed,and then the phase center algorithm was derived by combining its definition with the direction function.The simulation results verify the effectiveness of the proposed algorithm and show that the error of the phase center can reach the decimeter level after applying the adaptive algorithm.Therefore,the phase center error must be corrected in the high-precision applications.