正交双通道幅相误差的两种校正方法

Two calibration methods of I and Q errors

讨论了正交双通道幅相不一致的数字校正原理 ,提出了两种获得幅相误差函数的方法 ,包括最小二乘法和改进的Gram Schmidt正交化方法 .计算机仿真结果说明该方法是有效的 .

The theory of digitial calibration for the gain and phase mismatches between the in-phase and quadrature branches is discussed. Two methods for the estimation of the relative amplitude and phase errors function are presented, including the least squares and the modification based on the quadrature principle of Gram-Schmidt. The computer simulations show that they are effective.