Optimal weight coefficient improved GNSS (Global Navigation Satellite System) anti-interference method based on multi-antenna array

The invention provides an optimal weight coefficient improved GNSS anti-interference method based on a multi-antenna array. The method comprises the following steps: constructing a signal model of observation signals x collected by GNSS array antennas of N array elements; acquiring a covariance matrix of an array receiving signal according to the signal model; performing eigenvalue decomposition on the covariance matrix of the array receiving signal to obtain a matrix composed of eigenvectors; respectively constructing an interference subspace and a signal and noise subspace; on the basis of a linear constraint minimum variance beam forming algorithm, designing an improved algorithm of an optimal weight coefficient based on subspace constraint; solving an optimal weight coefficient according to a linear constraint minimum variance beam forming algorithm; and weighting the received signal by using the optimal weight coefficient to realize GNSS interference suppression. According to the improved algorithm provi