Clipping-and-Bank-Filtering Technique in Joint Crest Factor Reduction and Digital Predistortion for Power Amplifiers

Siqi Wang (1, 2) , Morgan Roger (2) , Caroline Lelandais-Perrault (2)

1 L2E - Laboratoire d'Electronique et Electromagnétisme
2 GeePs - Laboratoire Génie électrique et électronique de Paris

Crest factor reduction (CFR) and digital predis-tortion (DPD) are often used to enhance power amplifiers (PA) power efficiency while compensating for its nonlinearity. Among the joint CFR/DPDs in the literature, the one based on a parametric model has advantages on running complexity because the CFR and the DPD can be merged into a single model in the implementation. The model coefficients estimation is based on a reference correction signal computed by clipping the predistorted signal. In this paper, we propose a clipping-and-bank-filtering (CABF) method for generating the reference correction signal. The performance obtained by the proposed CABF approach outperforms the conventional clipping methods in terms of adjacent channel power ratio at PA output. Its effectiveness is validated by simulation results on a Wiener model Power Amplifier with a Long Term Evolution-Advanced signal.

Mots clés: power efficiency; Crest factor reduction; power amplifiers; digital predistortion; nonlinear distortion

Domaines: Traitement du signal et de l'image [eess.SP]; Micro et nanotechnologies/Microélectronique; Electronique

Siqi Wang, Morgan Roger, Caroline Lelandais-Perrault. Clipping-and-Bank-Filtering Technique in Joint Crest Factor Reduction and Digital Predistortion for Power Amplifiers. 2018 Asia-Pacific Microwave Conference (APMC), Nov 2018, Kyoto, Japan. ⟨10.23919/apmc.2018.8617530⟩. ⟨hal-01950225⟩