Active antenna array having analogue transmitter linearisation and a method for predistortion of radio signals

A method for predistortion of radio signals comprising:

• predistorting one or more of a plurality of analogue payload signals, thereby obtaining at least one predistorted payload signal,
• amplifying the at least one predistorted payload signal,
• extracting a portion of the at least one predistorted payload signal as a feedback signal, and
• adapting the predistorting of the analogue payload signal by comparing the feedback signal with at least one of the one or more of the plurality of analogue payload signals.

A computer program product comprising a non-transitory computer-usable medium having control logic stored therein for causing a computer to manufacture an active antenna array for a mobile communications network, the active array antenna comprising:

• a digital signal processor connected to a plurality of digital-to-analogue conversion blocks;
• a plurality of antenna elements;
• a plurality of transmission paths, whereby an individual one of the plurality of transmission paths is connected between an individual one of the plurality of digital-to-analogue conversion blocks and an individual one of the plurality of antenna elements, whereby an individual one of the plurality of transmission paths comprises a predistorter and a coupler;
• a plurality of feedback paths connected between an individual one of the couplers and an individual one of the predistorters, wherein an individual one of the plurality of feedback paths comprises a predistorter coefficient calculation unit.

A computer program product comprising a non-transitory computer-usable medium having control logic stored therein for causing an active antenna to execute a method for receiving a plurality of individual radio signals comprising:

• first computer readable code means for predistorting one or more of a plurality of analogue payload signals, thereby obtaining at least one predistorted payload signal;
• second computer readable code means for amplifying the at least one predistorted payload signal;
• third computer readable code means for extracting a portion of one or more of the at least one predistorted payload signal as a feedback signal
• fourth computer readable control means for adapting the predistorting of the one or more of the plurality of analogue payload signals by comparing the feedback signal with at least one of the one or more of the plurality of analogue payload signals.