Method for suppressing electromagnetic interference in an amplitude modulated radio signal, in particular received in an electric or hybrid vehicle

A method for attenuating electromagnetic interference in an amplitude-modulated radio signal received by a radio receiver, said electromagnetic interference being produced by a source of interference, so as to produce a filtered radio signal Zn defined by Zn=WnTYn at the time n, where Yn is a vector the components of which correspond to the radio signal received by a first antenna of the radio receiver, said received radio signal containing electromagnetic interference, and a second signal received by a second antenna connected to the source of interference, respectively, said second signal corresponding to the electromagnetic interference, in complex baseband, and Wn is a vector the components of which correspond to the characteristic complex coefficients of an impulse response filter, said complex coefficients being intended to be applied to the received radio signal expressed in complex baseband and to the second radio signal expressed in complex baseband, respectively, in order to form, after combination, the filtered radio signal Zn in which the electromagnetic interference is attenuated, the method comprising determining complex coefficients of the vector Wn such that:

• Zn=WnTYn=w1,n·y1,n+w2,n·y2,n,
• by the introduction of a correlation between the real and imaginary parts of said complex coefficients, said complex coefficients being expressed in polar coordinates, so that
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• w
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• and of the implementation of a predetermined iterative algorithm configured to determine the g1,n, g2,n, θ1,n and θ2,n able to minimize the following cost function:
• J
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• so as to obtain the vector Wn of characteristic complex coefficients of the impulse response filter to be applied to the received radio signal Yn in order to attenuate the electromagnetic interference thereof.