Three-dimensional power segmented tracking for adaptive digital pre-distortion

抄録

A three-dimensional power segmented tracking for adaptive digital pre-distortion is presented to stabilize the linearization of radio frequency power amplifiers (PAs). It contains long term average power segmented dimensional, short term average power segmented dimensional and instant power segmented dimensional that can correct and track the various nonlinear characteristics of PAs. Moreover, a constraint least square algorithm by indirectly learning structure is employed to initial the parameters and a least mean square algorithm by directly learning structure is used to adaptive calculate the parameters. Experimental results show that the proposed method has stable improvements in comparison with previous methods.