Active antenna array having a single dpd lineariser and a method for predistortion of radio signals

A method for predistortion of radio signals comprising:

• correcting two or more of a plurality of analogue payload signals, thereby
• obtaining at least two corrected payload signals,
• amplifying the at least two corrected payload signals,
• extracting a portion of one or more of the at least two corrected payload signals as a single feedback signal, and
• adapting the correcting of the two or more of a plurality of analogue payload signals by combining the two or more of the more of the plurality of analogue payload signals with a correction signal generated by comparing the single feedback signal with at least one of the two 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 antenna array 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 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 correction signal combiner and a feedback coupler;
• a plurality of paths connected between individual ones of the feedback couplers and a single feedback combiner
• a single feedback path connected between the single feedback combiner and a correction signal calculation unit;
• and
• a single correction signal path connected between the correction signal calculation unit and at least two of the correction signal combiners

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 transmitting a plurality of individual radio signals comprising:

• a. first computer readable code means for correcting two or more of a plurality of analogue payload signals, thereby obtaining at least two corrected payload signals;
• b. second computer readable code means for amplifying the at least one corrected payload signal
• c. third computer readable code means for extracting a portion of one or more of the at least one corrected payload signal as a single feedback signal
• d. fourth computer readable control means for adapting the correcting of the two or more of a plurality of analogue payload signals by combining the two or more of the more of the plurality of analogue payload signals with a correction signal generated by comparing the single feedback signal with at least one of the two or more of the plurality of analogue payload signals.