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This paper evaluates the Doherty power amplifier architecture in terms of linearity, efficiency and design solutions. As case study four different prototypes are presented, one for 4G Picocells at 2.1 GHz, one for WiMax applications at 3.5 GHz and two for point-to-point microwave backhaul radiolinks at 7 GHz. Experimental results together with design guidelines are discussed addressing strengths and...
A FPGA-based baseband predistortion scheme is discussed and applied to the linearization of a representative advanced power amplifier, a Si LDMOS power amplifier for basestation applications. Promising results are obtained regarding the efficiency and linearity performance improvement with modulated input signals following the W-CDMA 3GPP standard. The paper proposes a new parallel pipelined architecture...
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