RF PA Linearization: Open-loop Digital Predistortion Using Cartesian Feedback for Adaptive PA Characterization
نویسنده
چکیده
This work combines the advantages of two different RF power amplifier (PA) linearization techniques: digital predistortion (DPD) and Cartesian feedback (CFB). Cartesian feedback, an extension of classical continuoustime feedback, is limited by the bandwidth of its loop transfer function; this bandwidth, in turn, puts an upper limit on the bandwidth of the data input. However, this limitation gives one the ability to continuously linearize the PA without extensive knowledge of the PA characteristics [1].
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