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US 10,320,340 B1Granted
Frequency-shaped digital predistortion
AssigneeAnalog Devices Global Unlimited Company
InventorsPatrick Pratt, David Jennings
Life of this patent
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AssigneeAnalog Devices Global Unlimited Company
InventorsPatrick Pratt, David Jennings
Estimating the term…
Various examples are directed to a digital predistortion (DPD) circuit comprising a DPD actuator circuit, a DPD feedback frequency-shaping filter, a basis matrix generator circuit, a basis matrix frequency-shaping filter, and a DPD adaption circuit. The DPD actuator circuit may generate a predistorted signal based at least in part on an input signal and a set of frequency-shaped DPD parameters. The DPD feedback frequency-shaping filter may filter a DPD feedback signal to generate a frequency-shaped DPD feedback signal. A passband of the DPD feedback frequency-shaping filter may include substantially all of a bandwidth of the input signal and exclude a distortion term outside the bandwidth of the input signal. The basis matrix generator may generate a basis matrix based at least in part on a power amplifier feedback signal The basis matrix frequency-shaping filter may generate a frequency-shaped basis matrix based at least in part on the basis matrix. The DPD adaption circuit may be configured to generate the set of frequency-shaped DPD parameters based at least in part on the frequency-shaped basis matrix and the frequency-shaped DPD feedback signal.
A digital predistortion (DPD) circuit with frequency shaping, comprising:
A method for performing digital predistortion (DPD) with frequency-shaping, comprising:
A system for performing digital predistortion (DPD) with frequency-shaping, comprising:
Dependencies are inferred from the claim text.