Samsung Electronics Co., Ltd.

Postech Foundation

Keun-Hyo Song

Bum-Man Kim

Young-Yoon Woo

Cheol-Woo Ahn

Cheol-Soo Seo

Il-Du Kim

Kae-Oh Sun

An apparatus and method for power amplification in a wireless communication system are provided. The apparatus includes an envelope generator for generating an envelope signal from a Radio Frequency (RF) signal, a switching controller for generating a first switching control signal by delta-sigma modulating the envelope signal, and for generating a second switching control signal by amplifying an error signal obtained from a difference between an envelope signal restored by filtering the modulated envelope signal and an original envelope signal and an amplifier for outputting a first output signal by amplifying a phase signal according to the first switching control signal, for outputting a second output signal by amplifying the phase signal according to the second switching control signal, and for combining the first output signal and the second output signal. Thus, high efficiency and high linearity can be accomplished in the power amplification.

Apparatus and method for power amplification in wireless communication system

An apparatus and a method for an Envelope Elimination and Restoration (EER) power transmitter are provided. The apparatus includes a signal separator for splitting a transmit signal to an amplitude component and a phase component, an orthogonal modulator for modulating the phase component into a Radio Frequency (RF) signal, a bias modulator for linearly amplifying the amplitude component, for determining a bias voltage according to a magnitude of the amplitude component, and for providing a current generated using the determined bias voltage to a high-efficiency power amplifier and the high-efficiency power amplifier for amplifying the RF signal using the linearly amplified amplitude component as a drain bias voltage and using the generated current as a drain bias current.

Apparatus and method for power transmitter in wireless communication system

Growing community of inventors

Seongnam-si, South Korea

Keun-Hyo Song