Power amplifiers often introduce distortion when driven near their maximum output to achieve high efficiency. Digital predistortion applies an inverse distortion profile to the baseband signal before it reaches the amplifier. When the pre-distorted signal passes through the nonlinear amplifier, the two effects cancel out, resulting in a clean, linear output.
The base station is failing emission masks, so check if the digital predistortion coefficients are updating correctly.
Also heard as
- DPD
Related terms
Amplifier
A circuit or standalone device that increases the power, voltage, or current of an electrical signal.
Signal processing
The mathematical manipulation of physical data streams to filter, compress, or extract information.
Gain
A measure of a circuit's ability to increase the power or amplitude of a signal.