Predistortion is a technique used to improve the linearity of radio transmitter amplifiers. An amplifier that compresses its input or has a non-linear input/output relationship causes the output signal to splatter onto adjacent radio frequencies. ... This causes interference on other radio channels.

How does digital predistortion work?

Digital Pre-Distortion (DPD) is a technique to increase linearity or compensate for non-linearity in power amplifiers. ... Digital Pre-Distortion applies inverse distortion, using a pre-distorter, at the input signal of the PA to cancel the distortion generated by the power amplifier.

What is DPD algorithm?

Digital predistortion (DPD) has emerged as the preferred method of PA linearization. The complete solution consists of the DPD algorithm in the FPGA and the RF feedback receiver, also called the observation path receiver.