Doherty power amplifiers in software radio systems

Power amplification in software defined radio needs reconfigurabilty as well as optimum performance in terms of linearity and efficiency to handle different modulation standards (and hence carrier and modulation bandwidth). Since digital predistortion is now widely accepted as highly suitable solutions for linearization in a reconfigurable perspective. Hence, this technique in conjunction with multi-band Doherty power amplifiers finds a potential solution for reconfigurable-multi-band software defined radio transmitter. This paper demonstrates the current state-of art for such transmitters, including a brief discussion about the available design methodology for the dual-band Doherty power amplifier.