Samsung Electronics Co., Ltd.

Hongmin Choi

Junse Lee

Hyunseok Yu

Youngik Cho

Kyungwoo Yoo

Heesang Noh

Haedong Yeon

Joonhoi Hur

Changhyun Baek

Hyungsun Lim

Hyung Sun Lim

A wireless communication device includes a pre-distortion circuit configured to generate a pre-distortion signal by pre-distorting an input signal based on a pre-distortion coefficient, a power amplifier configured to generate an output signal by amplifying the pre-distortion signal, a measurement circuit configured to measure a magnitude of a first frequency component of a first adjacent channel and a magnitude of a second frequency component of a second adjacent channel of the output signal, a filtering circuit, that includes an error filter, configured to generate a filtered error signal by filtering an error signal that is based on the input signal and the output signal, the error filter is configured based on the magnitude of the first frequency component and the magnitude of the second frequency component, and a pre-distortion coefficient update circuit configured to update the pre-distortion coefficient based on the error signal or the filtered error signal.

Wireless communication device and operating method of wireless communication device

Disclosed is an electronic device, which includes a predistorter that predistorts an input signal based on a predistortion coefficient to generate a predistortion signal; a power amplifier that amplifies the predistortion signal to generate an output signal; an error correction unit that updates the predistortion coefficient to minimize an Normalized Mean Square Error (NMSE) between the input signal and the output signal; and an ACLR adjustment unit that operates when the NMSE is minimized, calculates an Adjacent Channel Leakage Ratio (ACLR) from the output signal, and updates the predistortion coefficient to minimize a cost function defined based on the ACLR.

ACLR adjustable electronic device and operation method therefor

A device configured to perform wireless communication includes: a pre-distortion circuit configured to generate a pre-distorted input signal by performing pre-distortion on an input signal based on a parameter set comprising a plurality of coefficients; a power amplifier configured to generate an output signal by amplifying an RF signal based on the pre-distorted input signal; and a parameter obtaining circuit configured to obtain second memory polynomial modeling information corresponding to an operating frequency band based on first memory polynomial modeling information corresponding to each of a plurality of frequency sections and obtain a parameter set according to an indirect learning structure by using the second memory polynomial modeling information.

Device and method for compensating for nonlinearity of power amplifier

Systems and methods are described to perform wireless communication. The device includes a pre-distortion circuit configured to pre-distort an input signal based on a parameter set including a plurality of coefficients and generate a pre-distorted signal, a power amplifier configured to amplify the pre-distorted signal and generate an output signal, and a parameter obtaining circuit configured to perform an iterative approximation operation based on the output signal and the pre-distorted signal, which change over time, according to an indirect training structure configured to minimize a difference between an intermediate signal obtained based on the output signal and the pre-distorted signal, and obtain the parameter set.

Device and method of compensating for nonlinearity of power amplifier

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.

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Seoul, South Korea

Hongmin Choi