2026-04-05T10:51:48Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/873902025-07-17T02:39:51Zcom_2072_1033col_2072_452950

Digital predistortion of envelope tracking amplifiers driven by slew-rate limited envelopes Montoro López, Gabriel Gilabert Pinal, Pere Lluís Berenguer Sau, Jordi Bertran Albertí, Eduardo Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència Power amplifiers Amplifier distortion Digital predistortion Efficiency Envelope tracking Envelope amplifier Amplificadors de potència This paper presents a new Digital Predistorter (DPD) to compensate for nonlinear distortion that arises in Envelope Tracking (ET) Power Amplifiers (PAs) driven by slew-rate limited versions of the real signal's envelope. The slower version of the transmitted signal's envelope is used to cope with the slew-rate and bandwidth limitations of Envelope Amplifiers (EAs). Unfortunately, the use of slower versions of the real signal's envelope as the drain modulator generates a special kind of nonlinear memory effects. This paper shows experimental results that prove that is possible to compensate for these nonlinear memory effects that appear when exciting the supply of a RF linear PA with a slew-rate limited version of the envelope. Peer Reviewed Postprint (published version) 2011 Conference report http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=05725386 Restricted access - publisher's policy IEEE Microwave Theory and Techniques Society