Samsung Electronics Co., Ltd.

Haedong Yeon

Hyunseok Yu

Joohyun Do

Youngik Cho

Hongmin Choi

Junse Lee

Changhyun Baek

Heesang Noh

An operating method of a wireless communications device includes identifying a modulation order and resource allocation information of a first uplink signal transmitted in a first symbol and a second uplink signal transmitted in a second symbol preceding the first symbol, controlling a difference between a supply modulator output voltage value for the first uplink signal and a supply modulator output voltage value for the second uplink signal, based on the identified order or information, and transmitting the first uplink signal, based on the controlled difference between the supply modulator output voltage values.

Wireless communications device for transmitting uplink signal and operating method thereof

A method is provided. The method includes estimating adjacent channel leakage ratios respectively corresponding based on a test output signal output from a power amplifier according to a test input signal corresponding to a plurality of frequencies; selecting a test delay value corresponding to a largest value among the estimated adjacent channel leakage ratios; and providing a supply voltage to the power amplifier based on an envelope signal delayed according to the selected test delay value. For each of the plurality of test delay values, a corresponding adjacent channel leakage ratio is estimated based on a ratio of a magnitude of a component included in the test output signal and a magnitude of an inter-modulated component.

Communication apparatus for supporting envelope tracking modulation and envelope delay optimization method

Growing community of inventors

Hwaseong-si, South Korea

Haedong Yeon