Post-processing method based on cylindrical array column harmonic decomposition order beam forming

The invention discloses a post-processing method based on cylindrical array column harmonic decomposition order beam forming, which comprises the following steps: 1) order beam forming: performing column harmonic decomposition on an array element signal in a frequency domain to obtain a high-order vector signal, and performing beam forming according to positive and negative orders respectively; 2) filtering post-processing: summing the two kinds of wave beam domain data to obtain a wave beam domain signal of an overall order, and calculating a filtered wave beam signal through weighting of an optimal filtering coefficient; and step 3) sub-band extreme value detection post-processing is carried out to obtain a detected beam signal through in-band summation, extreme value detection, sub-band comprehensive summation and the like. According to the method, the shielding of a weak target by a strong target in a broadband warning process is reduced, the distinguishing and detecting capability of the broadband target