1. A method for the estimation of a radio propagation channel between an emitter and a receiver where the said emitter emits a signal comprising symbol frames distributed in time and frequency, among which some symbols, called pilot symbols, are known to the receiver, wherein the method comprises the following steps performed by the receiver: computation of a covariance matrix M F of the channel in the frequency domain; computation of a covariance matrix M T of the channel in the time domain; decomposition of covariance matrices M F and M T into eigenvectors according to the relations M F =W F H N F W F and M T =W T H N T W T , in which: W F is an eigenvector matrix of the matrix M F ; N F is a diagonal matrix comprising eigenvalues associated with the eigenvectors of the matrix M F ; W T is an eigenvector matrix of the matrix M T ; N T is a diagonal matrix comprising eigenvalues associated with the eigenvectors of the matrix M T ; computation of the Kronecker product of the eigenvector matrices W F and W T to obtain an overall eigenvector matrix W; computation of a diagonal overall eigenvalue matrix N equal to the Kronecker product of the eigenvalue matrices N F and N T ; and estimation of the propagation channel with the help of pilot symbols and eigenvector matrices W and eigenvalue matrices N using the maximum a posteriori or quadratic error minimisation criterion.