Abstract
PROBLEM TO BE SOLVED: To improve distortion compensation accuracy of a power amplifier. :SOLUTION: An LMS algorithm using a feedback signal that is an output signal of a power amplifier 1 input via an attenuator 15 and pseudorandom data calculates a delay of an input signal to the power amplifier 1. A delay of an input signal to the power amplifier 1 is adjusted on the basis of the calculated delay to match timing of the input signal to the power amplifier 1 with a feedback signal including a fractional delay, and the delay-adjusted input signal where the timing is matched is used for distortion compensation of the input signal to the power amplifier 1 to improve DPD mode distortion compensation accuracy. ;COPYRIGHT: (C)2013,JPO&INPIT;PROBLEM TO BE SOLVED: To improve distortion compensation accuracy of a power amplifier.SOLUTION: An LMS algorithm using a feedback signal that is an output signal of a power amplifier 1 input via an attenuator 15 and pseudorandom data calculates a delay of an input signal to the power amplifier 1. A delay of an input signal to the power amplifier 1 is adjusted on the basis of the calculated delay to match timing of the input signal to the power amplifier 1 with a feedback signal including a fractional delay, and the delay-adjusted input signal where the timing is matched is used for distortion compensation of the input signal to the power amplifier 1 to improve DPD mode distortion compensation accuracy.
| Original language | English |
|---|---|
| Patent number | JP2013115725 (A) |
| Priority date | 31/01/12 |
| Publication status | Published - 10 Jun 2013 |
Keywords
- EWI-23117
- IR-101965
- METIS-296323