Method and device for radio reception using a plurality of antennas and a multiple-input-port and multiple-output-port amplifier

A receiver for radio reception with multiple antennas using N antennas in a given frequency band, where N is an integer greater than or equal to 2, the receiver comprising:

• a multiple-input-port and multiple-output-port amplifier comprising n input ports, where n is an integer greater than or equal to 2 and less than or equal to N, m output ports, where m is an integer greater than or equal to 2, and p adjustable impedance devices, where p is an integer greater than or equal to m, each of the adjustable impedance devices having a reactance at a frequency in the given frequency band, the input ports presenting, at said frequency in the given frequency band, an admittance matrix referred to as the admittance matrix presented by the input ports, the reactance of any one of the adjustable impedance devices having an influence on the admittance matrix presented by the input ports, the reactance of any one of the adjustable impedance devices being adjustable by electrical means, each of the output ports delivering a signal;
• a multiple-input signal processing device processing m digital signals, each of the digital signals being mainly determined by one and only one of the signals delivered by the output ports, the multiple-input signal processing device estimating one or more quantities representative of a channel matrix between a plurality of signals sent by a transmitter and the m signals delivered by the output ports, the multiple-input signal processing device delivering a tuning instruction as a function of said one or more quantities representative of a channel matrix;
• a tuning control unit, the tuning control unit receiving the tuning instruction from the multiple-input signal processing device, the tuning control unit delivering one or more tuning control signals to the multiple-input-port and multiple-output-port amplifier, the tuning control signals being determined as a function of the tuning instruction, the reactance of each of the adjustable impedance devices being mainly determined by one or more of the tuning control signals.