公开(公告)号：US20150282001A1

公开(公告)日：2015-10-01

申请号：US14671105

申请日：2015-03-27

Applicant: Samsung Electronics Co., Ltd. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Se-Min KWAK ,  Yong-Hoon KIM ,  Hee-Seong YANG ,  Sang-Hyouk CHOI ,  Joo-Hwan CHUN

IPC: H04W28/02 ,  H04B7/06

CPC classification number: H04B7/0617 ,  H04B7/0695

Abstract: A beamforming method is provided. The beamforming method includes determining different beams for pieces of user equipment based on channel information fed back from the pieces of user equipment, predicting beam qualities of the pieces of user equipment for the beams, determining whether the beam qualities satisfy Quality of Service (QoS) for the pieces of user equipment, generating a wide nulling beam by applying wide nulling to a second beam having a side lobe acting as interference against one first beam, when the beam quality of the first beam does not satisfy the QoS; predicting beam qualities for the beams including the wide nulling beam instead of the second beam, and simultaneously communicating with the user equipment through the beams including the wide nulling beam instead of the second beam, when the beam qualities for the beams including the wide nulling beam instead of the second beam satisfy the QoS.

Abstract translation: 提供了波束成形方法。 波束成形方法包括基于从用户设备反馈的信道信息来确定用户设备的不同波束，预测用于波束的用户设备的波束质量，确定波束质量是否满足服务质量（QoS） 对于所述用户设备，当所述第一波束的波束质量不满足所述QoS时，通过对具有用于作为对一个第一波束的干扰的侧波瓣的第二波束应用宽零位来产生宽的归零波束; 预测包括宽零位光束而不是第二光束的光束的光束质量，并且当包括宽零位光束的光束的光束质量时，同时通过包括宽零位光束的光束而不是第二光束与用户设备通信 而不是第二个波束满足QoS。

公开(公告)号：US20160376716A1

公开(公告)日：2016-12-29

申请号：US14925431

申请日：2015-10-28

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Jeung Ku KANG ,  Dong Ki LEE ,  Gyu Heon LEE ,  Yong-Hoon KIM ,  Ji Il CHOI

IPC: C25B11/04

CPC classification number: C25B11/0478 ,  C02F2305/10 ,  Y02E10/52 ,  Y02P20/134

Abstract: Disclosed is a method for improving solar energy conversion efficiency of a metal oxide semiconductor photocatalyst, which includes rapidly performing hydrogenation and nitrogenation of a metal oxide semiconductor material through an H2/N2 mixed gas plasma treatment in a single process at room temperature, so as to enhance photocatalytic energy conversion efficiency. Specifically, disclosed is a treatment technique in which a plasma ball formed by controlling a mixing ratio of hydrogen gas to nitrogen gas in a range of 1:1 to 1:3 contacts with a surface of a metal oxide material, such that a great amount of oxygen vacancy and nitrogen elements are introduced in the surface of the metal oxide material to improve electron-hole pairs transfer ability thereof and decrease a size of the band-gap. A catalyst including the metal oxide material directly converts the solar energy into a compound by photocatalytic hydrogen generation and CO2 conversion.

Abstract translation: 公开了一种提高金属氧化物半导体光催化剂的太阳能转换效率的方法，其包括在室温下通过H 2 / N 2混合气体等离子体处理在单一工艺中迅速进行金属氧化物半导体材料的氢化和氮化，从而 提高光催化能量转换效率。 具体地说，公开了一种处理技术，其中通过控制氢气与氮气的混合比在1：1至1：3的范围内形成的等离子体球与金属氧化物材料的表面接触，使得大量 的氧空位和氮元素引入金属氧化物材料的表面，以改善其电子 - 空穴对转移能力并减小带隙的尺寸。 包括金属氧化物材料的催化剂通过光催化氢生成和CO 2转化将太阳能直接转化为化合物。

公开(公告)号：US20130165059A1

公开(公告)日：2013-06-27

申请号：US13727377

申请日：2012-12-26

Applicant: Samsung Electronics Co. Ltd. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)

Inventor： Mi-Hyun SON ,  Yong-Hoon KIM ,  Byung-Tae YOON ,  Jong-Wook ZEONG ,  Dong-Geun LEE ,  Jeong-Seon LEE ,  Sang-Gug LEE

IPC: H04B7/04

CPC classification number: H04B7/043 ,  H04B7/0848

Abstract: Provided is a beamforming apparatus in a receiver in a mobile communication system. The beamforming apparatus includes a Local Oscillator (LO) signal generator for generating an LO signal; a phase shifter for generating a predetermined number of phase-shifted LO signals with respect to the generated LO signal; a switching network for mapping the phase-shifted LO signals to RF signals received via a plurality of receive paths; and a mixer for mixing the RF signals with the mapped LO signals to down-convert a frequency of the RF signals.

Abstract translation: 提供了一种在移动通信系统中的接收机中的波束成形装置。 波束形成装置包括用于产生LO信号的本地振荡器（LO）信号发生器; 移相器，用于相对于所生成的LO信号产生预定数量的相移LO信号; 切换网络，用于将相移的LO信号映射到经由多个接收路径接收的RF信号; 以及用于将RF信号与所映射的LO信号混合以对RF信号的频率进行下变频的混频器。

公开(公告)号：US20130163696A1

公开(公告)日：2013-06-27

申请号：US13726901

申请日：2012-12-26

Applicant: Samsung Electronics Co., Ltd. ,  KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (KAIST)

Inventor： Mi-Hyun SON ,  Yong-Hoon KIM ,  Byung-Tae YOON ,  Jong-Wook ZEONG ,  Dong-Geun LEE ,  Jae-Hun LEE ,  Song-Cheol HONG

IPC: H03F1/32 ,  H04B1/04

CPC classification number: H03F1/3241 ,  H03F1/3247 ,  H03F1/3294 ,  H03F3/24 ,  H03F3/68 ,  H03F2200/102 ,  H03F2200/336 ,  H04B1/0475 ,  H04B2001/0425

Abstract: Provided is a method in which a Digital Pre-Distorter (DPD) performs digital pre-distortion on a received In-phase (I) signal, a received Quadrature-phase (Q) signal, a feedback I signal, and a feedback Q signal; a mixer mixes a signal output from the DPD with a frequency signal output from an oscillator; each of n phase shifters phase-shifts a signal output from the mixer according to a preset beamforming pattern; each of n Power Amplifiers (PAs) amplifies a signal output from an associated phase shifter according to a gain, the PAs connected to the associated phase shifter on a one-to-one basis; each of n envelope detectors detects an envelope signal from a signal output from an associated PA, the envelope detector connected to the associated PA on a one-to-one basis; and a control unit determines whether the n PAs operate normally, using the envelope signals output from the n envelope detectors.

Abstract translation: 提供了一种数字预失真器（DPD）对接收到的同相（I）信号，接收的正交相（Q）信号，反馈I信号和反馈Q信号进行数字预失真的方法 ; 混频器将从DPD输出的信号与从振荡器输出的频率信号混合; 每个n个移相器根据预设的波束形成模式将从混频器输出的信号相移; n个功率放大器（PA）中的每一个根据增益放大来自相关移相器的信号，一对一连接到相关联的移相器的PA; n个包络检测器中的每一个检测从相关联的PA输出的信号的包络信号，包络检测器以一对一的方式连接到相关联的PA; 并且控制单元使用从n个包络检测器输出的包络信号确定n个PA是否正常工作。

公开(公告)号：US20170014813A1

公开(公告)日：2017-01-19

申请号：US15194985

申请日：2016-06-28

Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jeung Ku KANG ,  Dong Ki LEE ,  Gyu Heon LEE ,  Yong-Hoon KIM ,  Ji Il CHOI

IPC: B01J27/24 ,  B01J23/42 ,  B01J37/02 ,  B01J35/02 ,  B01J37/08 ,  B01J37/34 ,  H01L31/18 ,  B01J35/00

CPC classification number: B01J27/24 ,  B01J21/063 ,  B01J23/755 ,  B01J35/0033 ,  B01J35/004 ,  B01J37/348 ,  B01J37/349

Abstract: The present invention discloses a method for improving solar energy conversion efficiency using metal oxide photocatalysts having an energy band of core-shell structure for ultraviolet (UV) ray and visible light absorption, comprising a first process of forming a nanoparticle thin film layer; a second process of preparing a core-shell metal oxide on metal oxide nanoparticles by a plasma reaction under a hydrogen and nitrogen gas atmosphere, and a third process of depositing a transition metal on surfaces of core-shell metal oxide nanoparticles to produce a photocatalyst for energy conversion. A great amount of oxygen vacancies is formed in a shell region by the core-shell metal oxide to achieve effects of improving transfer ability of electron-hole pairs excited by light, and extending a wavelength range of absorbable light to a visible light region by changing a band-gap structure.

Abstract translation: 本发明公开了一种使用金属氧化物光催化剂提高太阳能转换效率的方法，所述金属氧化物光催化剂具有用于紫外（UV）射线和可见光吸收的核 - 壳结构的能带，包括形成纳米颗粒薄膜层的第一工艺; 在氢气和氮气气氛下通过等离子体反应在金属氧化物纳米颗粒上制备核 - 壳金属氧化物的第二种方法，以及在核 - 壳金属氧化物纳米颗粒的表面上沉积过渡金属以产生光催化剂的第三种方法 能量转换。 通过核 - 壳金属氧化物在壳区域中形成大量的氧空位，以实现改善由光激发的电子 - 空穴对的转移能力的效果，并且通过改变可变光区域将可吸收光的波长范围扩展到可见光区域 带隙结构。