Samsung Electronics Co., Ltd.

Postech Research and Business Development Foundation

Yuichi Aoki

Yonghoon Kim

Hyunchul Park

Daehyun Kang

Donggyu Minn

Wonki Kim

Tuan Manh Dao

Ho-Jin Song

Seunguk Choi

Manh-Tuan Dao

Yongan Hwang

Heedo Kang

Manh Tuan Dao

Manhtuan Dao

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). An electronic device, in a wireless communication system, may include: a processor, an antenna array, a plurality of first radio frequency (RF) paths related to a first stream, the first RF paths each including a transmit (TX) path and a receive (RX) path, and a plurality of second RF paths related to a second stream, the second RF paths each including a TX path and an RX path, and the processor may be configured to: generate a calibration signal for the antenna array, obtain characteristic information of the antenna array based on a phase difference or a gain difference between one TX path having the first stream and one RX path having the second stream obtained for each of measurement RF paths among the plurality of the first RF paths, and calibrate the plurality of the first RF paths based on the characteristic information.

Apparatus and method for error correction in wireless communication system

The present disclosure relates to a communication technique for merging, with an IoT technology, a 5G communication system for supporting a higher data transmission rate than a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of a 5G communication technology and an IoT-related technology. The present disclosure discloses a method for calibration of a phased array antenna.

Method and apparatus for calibrating phased array antenna

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4-Generation (4G) communication system such as long-term evolution (LTE). The present disclosure provides a device and a method for calibrating a phased array antenna. A method for calibrating a phased array antenna according to various embodiments of the disclosure comprises the processes of: controlling a first radio frequency (RF) chain so as to transmit a first signal at a first phase, thereby determining the phase difference between the first phase and a reference phase; controlling the first RF chain so as to transmit a second signal at a second phase, thereby determining the phase condition of the phase difference; and calibrating the first RF chain on the basis of the phase difference and the phase condition. The reference phase may be the phase of a reference signal transmitted from a reference RF chain. Accordingly, the time necessary for calibration may be reduced, and mass production of phased array antennas may be facilitated. The present research has been financed by the Korean government (Ministry of Science and ICT) in 2017 and conducted with the support of 'Intra-ministry Giga Korean Project' (No. GK17N0100, Millimeter-wave 5G Mobile Communication System Development).

Device and method for calibrating phased array antenna

The present disclosure relates to a 5G or pre-5G communication system to be provided to support a higher data transmission rate after a 4G communication system such as LTE. An embodiment of the present specification relates to beamforming in a mobile communication system and comprises a step for configuring an operation of a limiter circuit for adjusting amplitude of a signal received by a receiver, and receiving the signal according the configuration. According to various embodiments of the present specification, a limiter circuit employed in a receiver supporting beamforming can prevent a reception circuit from being damaged. Further, when reception antenna gain is low or a high signal-to-noise ratio is required, a received signal is not allowed to pass through the limiter circuit so that the received signal can be prevented from deteriorating.

Method and apparatus for receiving signal in mobile communication system

Provided are a radio frequency (RF) signal transmission apparatus and a control method of the RF signal transmission apparatus, in which a local oscillator (LO) leakage signal may be suppressed. The RF signal transmission apparatus may perform beamforming to form a beam based on a plurality of RF signals generated in a plurality of transmission chains, measure magnitude of an LO leakage signal of the beam formed by performing beamforming, and generate an LO leakage suppression signal based on the magnitude of the LO leakage signal.

RF signal transmission apparatus and control method therefor

The present disclosure relates to a pre-5-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4-Generation (4G) communication system such as Long Term Evolution (LTE). A method for operating a terminal in a wireless communication system may comprise the steps of: receiving a first signal by using a first number of antennas during a first downlink interval; receiving a second signal by using a second number of antennas during a second downlink interval; and transmitting a third signal by using the second number of antennas during an uplink interval, with output power compensated on the basis of the first signal and the second signal.

Apparatus and method for controlling uplink transmission power in wireless communication system

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). A method of operating an electronic device in a wireless communication system is provided. The method includes inputting training signals into a first loopback route and a second loopback route, determining a loopback gain and a loopback phase, based on a first training signal passing through the first loopback route and a second training signal passing through the second loopback route, determining a frequency domain compensation filter, based on the loopback gain and the loopback phase, determining an FIR filter and a DC offset, based on the frequency domain compensation filter, and compensating for a transmission signal and a reception signal, based on the FIR filter and the DC offset.

Electronic device including transceiver for calibrating I/Q imbalance in millimeter wave communication system and method of operating same

An apparatus and method are provided for a communication scheme for converging a 5G communication system for supporting a higher data transfer rate than a post-4G system with the IoT technology. A method includes configuring a loopback path between a transmitter and a receiver; transmitting a preconfigured signal from the transmitter to the receiver through the loopback path; identifying an image signal, wherein the image signal includes a distorted signal of the preconfigured signal; determining a gain error value and a phase error value based on the preconfigured signal and the image signal; and performing I/Q calibration based on the gain error value and the phase error value. A subcarrier in which the preconfigured signal is transmitted and a subcarrier in which the image signal is generated do not overlap.

Growing community of inventors

Suwon-si, South Korea

Yuichi Aoki