METHOD FOR ESTIMATING A RADIO CHANNEL

摘要

This method for the estimation of a channel between an emitter and a receiver, where the said emitter emits a signal comprising symbol frames distributed in time and frequency, among which pilot symbols known to the receiver, is characterised in that it comprises the following steps: . - computation (30) of a covariance matrix M F and M T of the channel in the frequency and time domains respectively; . - decomposition (32) of the 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 ; . -computation (34) of the Kronecker product of the matrices NVF and W T to obtain an eigenvector matrix W; . - computation (34) of a diagonal eigenvalue matrix N equal to the Kronecker product of the eigenvalue matrices N F and N T ; and . - estimation of the channel with the help of pilot symbols and matrices W and N using the maximum a posteriori or quadratic error minimisation criterion.