METHOD FOR CALIBRATING A MULTI-CHANNEL RADIO RECEIVER

The invention relates to a method for calibrating a receiver comprising a plurality of analog reception channels each including an antenna element of a multi-element antenna, the plurality of analog reception channels comprising a reference channel,the method comprising determining (E1-E4) and correcting (E5), for each analog reception channel other than the reference channel, a phase shift with the reference channel, said determination comprising:calculating (E1) an observed covariance matrix (RZZt,e) representative of the covariance between samples (Zte), 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 (E2) an estimate () of a reference covariance matrix representative of the covariance between samples of said 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 (E3) a product matrix (), resulting from the term-by-term matrix product of the observed covariance matrix with the estimate of the reference covariance matrix;determining (E4) the argument () of complex terms of the product matrix.