Robust beam forming algorithm based on composite Gaussian Legendre integral

The invention relates to the technical field of array antennas, in particular to a robust beam forming algorithm based on composite Gaussian Legendre integral. Receiving an array signal, and establishing a beam optimization model according to the array signal and a preset expected direction; dividing an interference neighborhood of each interference signal in the array signal, and obtaining an interference signal subspace of each interference neighborhood by adopting a composite Gaussian Legendre polynomial; establishing a reconstructed interference covariance matrix based on the interference signal subspace, and substituting the reconstructed interference covariance matrix into the beam optimization model for solving to obtain an optimal weight vector; and establishing a beam output model according to the optimal weight vector and the array signal, and substituting the optimal weight vector into the beam output model to obtain an output result of beam forming. According to the invention, the composite Gaussi