Patent ID: 11863210
Assignee: NANOSEMI, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method for digital predistortion comprising:
receiving an input signal, u;
determining, by an envelope tracking module, based on amplitude variations of the input signal u, a time-varying signal, e;
causing a power supply modulator controlling electrical operation of a transmit chain to underpower a power amplifier of the transmit chain using the time-varying signal e so as to cause the transmit chain to operate in a non-linear mode;
predistorting the input signal, u, by a digital predistorter, to yield a digitally predistorted output, v, to mitigate non-linear operation of the transmit chain in the non-linear mode caused by underpowering of the power amplifier; and
providing the digitally predistorted output, v, to the transmit chain for processing via the power amplifier.