Envelope tracking power amplifier with static predistortion linearization

Memory models for behavioral modeling and digital predistortion of envelope tracking power amplifiers

“…In [17,16] the authors proposed a static 2D LUT controlled by two entries represented by the PA input signal xðtÞ and the PA modulated drain voltage V DD . Memoryless digital predistortion solutions for ET PAs were presented also in [26,12,27]. The memoryless static DPD presented in [12] was extended in [19] to include the compensation of distortion effects with memory.…”

Comparison of static and memory predistortion in envelope tracking system

“…AM-AM error is acquired from the complex baseband representation of the input u and the output y in Eq. (2). Here, the gain of the power amplifier is normalized i.e.…”

“…• Class E based EER with polynomial AM-AM and AM-PM predistortion for 0.5MHz signals [1] • Class AB based ET with polynomial AM-AM and AM-PM for 1MHz signals [2] • Class AB based ET for 1MHz signals with emphasis on different envelope modulation schemes (i.e. V DD -drives) [3] In [3], ET transmitter with linear 0.5W 1GHz LDMOS power amplifier with constant compression envelope yielded drain efficiency of 41% and power added efficiency of ca.…”