Advanced power amplifier technologies for multistandard and broadband wireless communications

To accommodate multistandard and broadband wireless communications, advanced power amplifier (PA) design and digital predistortion (DPD) methods are investigated in this paper. For efficiency enhancement in dual-band PAs, an intermodulation tuning (IM-Tuning) technique is introduced and employed to dual-band concurrent Doherty PA design. To reduce the complexity of conventional 2D-DPD behavioral model, a 2D modified memory polynomial (2D-MMP) and an adaptive pruinng method are demonstrated. Finally, a robust DPD behavioral model with a low sampling rate is also proposed for broadband applications.