Abstract
The RF front-end in modern communication systems is faced with variable envelope and large bandwidth signals (including desired signals and large interferers), which require the behavioral model of the amplifying unit (either in Tx or Rx) to accurately account for nonlinear memory effects. Important advancements have been made on the subject; however it is still challenging to derive a model that performs equally well with all possible input stimuli. This paper gives a concise overview of the recent developments that have been made on the continuous-time modeling approach for the behavioral modeling of nonlinear memory in power amplifiers, as opposed to the explicit discrete-time modeling approach.
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