Method for calibrating a multi-channel radio receiver

Abstract

A method for calibrating a receiver includes determining and correcting, for each analog reception channel other than a reference channel, a phase shift with the reference channel. The determining includes calculating an observed covariance matrix representative of a covariance between samples, collected in parallel on each of the analog reception channels over a period of time, of one or more incident reference radio signals on the multi-element antenna, obtaining an estimate of a reference covariance matrix representative of the covariance between samples of the incident radio signal(s) which would be collected in parallel on each of the analog reception channels over the period of time in the absence of phase shift between the analog reception channels, calculating a product matrix, resulting from a term-by-term matrix product of the observed covariance matrix with the estimate of the reference covariance matrix, and determining the argument of complex terms of the product matrix.