Samsung Electro-mechanics Co., Ltd.

Korea Advanced Institute of Science and Technology

Soon Il Hong

Yong Hoon Lee

Jong Ok Ha

Sang Il Lee

Eui Rim Jeong

Min Hyun Kim

Seong Jin Kim

Soon Chan Park

Young Wook Sirl

Kwang Pyo Lee

A high-frequency signal predistortion device includes a high-frequency signal estimator, a predistortion estimator, and a predistorter. The high-frequency signal estimator is configured to determine non-linear distortion characteristics of high-frequency signals transmitted by antennas. The predistortion estimator is coupled to the high-frequency signal estimator. The predistortion estimator is configured to determine a predistortion coefficient based on the non-linear distortion characteristics. The predistorter is coupled to the predistortion estimator. The predistorter is configured to distort a base signal of the high-frequency signals based on the predistortion coefficient.

High-frequency signal predistortion device and nonlinear distortion correcting device for power amplifier

An apparatus includes a first predistorter configured to calculate a first predistortion parameter and configured to distort an input signal using the first predistortion parameter to output a first distortion signal, a second predistorter configured to calculate a second predistortion parameter and configured to distort the first distortion signal using the second predistortion parameter to output a second distortion signal, a power supply configured to receive the first distortion signal to generate a first envelope signal, and configured to limit a bandwidth of the first envelope signal to obtain a second envelope signal to supply a source voltage, and a power amplifier configured to receive the source voltage and to output an output signal obtained by amplifying the second distortion signal.

Envelope tracking power amplifying apparatus and method

Growing community of inventors

Daejeon, South Korea

Soon Il Hong