Digital RF transmitters (TXs) have gained popularity in recent years for their many advantages. They
dispense with analog functions, such as baseband filters, variable‐gain amplifiers, and predrivers, while
allowing correction of I/Q mismatches and carrier leakage in the digital domain. Moreover, they avoid
the linearity‐gain trade‐off present in every stage of an analog TX.
The greatest challenge facing RF transmitters, analog or digital, is the trade‐off between the linearity