Digital predistortion linearizes wireless power amplifiers

Adaptive digital predistortion (DP), unlike other linearization methods, provides sufficient linearization with less complex RF hardware by depending primarily upon DSP rather than analog signal processing. The adaptive DP system can be implemented in EDA softwares along with interconnected test equipment. The connecting solution approach can provide key information to design engineers for optimizing the DSP architecture of a power amplifier (PA). In this process, by the use of a training signal, a simple adaptive algorithm may be employed to update the LUT coefficients until an optimum setting is achieved.