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相参单脉冲雷达信号的测角误差来源于同相和正交分量间的不平衡,同和与差信道间的不平衡一样,也是可用简单的方法来修正的。但这种修正方法并不是在时域中校正 I 与 Q 间的不平衡〔1〕,而是用后置积累校正法。该法使单脉冲信号的校准运算次数减少 X 倍,2≤x≤N,(N 是离散付立叶变换的采样次数),这取决于滤波的程度。它也使产生修正所必需的数学运算次数减少三倍。一阶近似预测在校正后所产生的剩余差误来源于偏置和镜象旁瓣。
The angular error of the coherent monopulse radar signal originates from the imbalance between the in-phase and the quadrature components, as well as the imbalance between the same and the worse channels, which can also be corrected by simple methods. However, this correction method does not correct the imbalance between I and Q in the time domain [1], but uses the post-accumulation correction method. This method reduces the number of single-pulse calibration operations by X, 2≤x≤N, where N is the number of samples of the discrete Fourier transform, depending on the degree of filtering. It also triples the number of math necessary to make a correction. The first-order approximation predicts the remaining errors that occur after the correction comes from bias and mirror sidelobes.