Presentation on Digital Predistortion of Power Amplifiers - Agilent ...
Presentation on Digital Predistortion of Power Amplifiers - Agilent ...
Presentation on Digital Predistortion of Power Amplifiers - Agilent ...
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<strong>Digital</strong> Predistorti<strong>on</strong> - 26<br />
Optimized LUT Gain for Predistorter<br />
Gain Gain<br />
Magnitude Magnitude<br />
Signal Signal Envelope Envelope<br />
Index Index<br />
<strong>Digital</strong> Predistorti<strong>on</strong> <strong>of</strong> <strong>Power</strong> Amps<br />
June, 01<br />
Time Time ( ( 20 20 ns/div)<br />
ns/div)<br />
Page 26<br />
We can observe the predistorter’s complex gain functi<strong>on</strong>s amplitude expansi<strong>on</strong> required<br />
to <strong>of</strong>fset the power amplifier gain compressi<strong>on</strong> as we near the saturati<strong>on</strong> regi<strong>on</strong>. For small<br />
envelope fluctuati<strong>on</strong>s the gain is approximately unity within a small error.
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