Abstract
A simplified memory polynomial (MP) behavioral model is proposed for single and dual band power amplifiers (PAs) modeling and digital predistorters (DPD). By integrating the quadratic component of the amplitude into conventional MPs, the nonlinearity orders and hence the complexity for model identification can be reduced effectively. The availability of the proposed single and dual band models are validated by computer simulation and experimental verification. Finally, a 10MHz long term evolution (LTE) modulated signal was tested on single-band model, experimental results show the proposed algorithm obtains around 20dB correction in adjacent channel power ratio (ACPR), which outperforms the conventional MP with the same nonlinear orders and achieves an ACPR improvement of 2.8dB.A forword modeling for dual-band PA is aslo implemented, and the normalized mean squared error (NMSE) in 1.9GHz and 2.4GHz improvement of 2.8dB and 3.5dB is achieved.
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