We carry out a comparative design study on two high-efficiency power amplifiers (a second-harmonic tuning LD-MOS and a Doherty GaN-based amplifier) linearized through baseband digital predistortion so as to comply with the W-CDMA 3GPP standard with acceptable efficiency. Several predistortion schemes (both memoryless and with memory) were tried, having in mind the final FPGA implementation. The results, besides highlighting some interesting features of the two amplifiers considered, show that significant improvements can be achieved in the Power Added Efficiency (PAE) even starting from a highly efficient but poorly linear power stage.
Real-time FPGA-based baseband predistortion of W-CDMA 3GPP high-efficiency power amplifiers: Comparing GaN HEMT and Si LDMOS predistorted PA performances / Quaglia, Roberto; Camarchia, Vittorio; DONATI GUERRIERI, Simona; Lima, E. G.; Ghione, Giovanni; Pirola, Marco; Tinivella, R.; Luo, Q.. - STAMPA. - Unico:(2009), pp. 342-345. (Intervento presentato al convegno Microwave Conference, 2009. EuMC 2009. European tenutosi a Roma nel Sept. 29 2009-Oct. 1 2009).
Real-time FPGA-based baseband predistortion of W-CDMA 3GPP high-efficiency power amplifiers: Comparing GaN HEMT and Si LDMOS predistorted PA performances
QUAGLIA, ROBERTO;CAMARCHIA, VITTORIO;DONATI GUERRIERI, Simona;GHIONE, GIOVANNI;PIROLA, Marco;
2009
Abstract
We carry out a comparative design study on two high-efficiency power amplifiers (a second-harmonic tuning LD-MOS and a Doherty GaN-based amplifier) linearized through baseband digital predistortion so as to comply with the W-CDMA 3GPP standard with acceptable efficiency. Several predistortion schemes (both memoryless and with memory) were tried, having in mind the final FPGA implementation. The results, besides highlighting some interesting features of the two amplifiers considered, show that significant improvements can be achieved in the Power Added Efficiency (PAE) even starting from a highly efficient but poorly linear power stage.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2659314
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