Samsung Electronics Co., Ltd.

Youngyoon Woo

Munwoo Lee

Donggeun Lee

Junghwan Moon

Pavel Martynovich

Jaebum Kim

Seonghyeon Lee

Jungwoo Ku

Martynovich Pavel

Sungchul Hong

Taeyoung Min

Jaehyung Im

Dogeun Eum

Minsik Jun

An electronic device may include: a processor; a power amplifier; a power supply configured to supply power to the power amplifier; a crest factor reduction (CFR) module; and a digital predistortion (DPD) module, wherein the processor is configured to: transmit a first radio frequency (RF) signal, based on a first state of each of the CFR module, the DPD module, and the power supply, in a first transmission interval, the first RF signal being generated from a first baseband signal; identify voltage information of a second RF signal associated with a second transmission interval after the first transmission interval; change a state of each of the CFR module, the DPD module, and the power supply from the first state to a second state, based on the voltage information, in a first reception interval between the first transmission interval and the second transmission interval; and transmit the second RF signal generated from a second baseband signal based on the second state of each of the CFR module, the DPD module, and the power supply, in the second transmission interval.

Electronic device and method for amplifying transmission signal in time division duplex scheme

An electronic device is provided. The electronic device includes a digital pre-distortion (DPD), a digital-to-analog converter (DAC), a power amplifier (PA), a first coupler obtaining a feedback signal from an output of the power amplifier, a circulator obtaining a reverse signal in which the output of the power amplifier is reflected, a transmission filter, a second coupler obtaining a filter-feedback signal from an output of the transmission filter, an antenna, an analog-to-digital converter (ADC) converting a composite signal including the feedback signal, the filter-feedback signal, and the reverse signal into a digital composite signal, a separation circuit, and a pulse inter-modulation cancellation (PIMC) circuit in which the separation circuit, based on the digital composite signal and an input signal of the DPD, obtains a digital signal of the feedback signal, a digital signal of the filter-feedback signal, and a digital signal of the reverse signal.

Electronic device and method for obtaining reverse signal and feedback signal in wireless communication system

The present disclosure relates to an apparatus and a method for transmitting a signal using a power amplifier in a wireless communication system in which a transceiver comprises a digital pre-distorter configured to distort an input signal based on a distortion control value, a power amplifier configured to amplify an output signal from the digital pre-distorter, an antenna configured to transmit an output signal from the power amplifier, an echo signal canceller configured to remove an echo signal which returns to the power amplifier due to a return loss of a path between the power amplifier and the antenna, from a feedback signal obtained at an output stage of the power amplifier, and a digital pre-distortion adaptation unit configured to determine the distortion control value based on an output signal from the echo signal canceller.

Apparatus and method for transmitting signal in wireless communication system

The present invention relates to an input/output signal synchronization method by a radio frequency unit. The input/output signal synchronization method according to the present invention comprises the steps of: generating a transmitter (Tx) input signal by adding, to a baseband signal, a test signal located at a frequency out of an operation frequency range of the radio frequency unit; collecting the Tx input signal and a Tx output signal obtained by outputting the input signal through a Tx function block; and synchronizing the Tx input signal and the Tx output signals, based on a result obtained by the collecting.

Method and device for synchronizing input/output signals by radio frequency unit in wireless communication system

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Hwaseong-si, South Korea

Youngyoon Woo